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/Problem10_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 18:49:12,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 18:49:12,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 18:49:12,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 18:49:12,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 18:49:12,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 18:49:12,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 18:49:12,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 18:49:12,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 18:49:12,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 18:49:12,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 18:49:12,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 18:49:12,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 18:49:12,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 18:49:12,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 18:49:12,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 18:49:12,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 18:49:12,831 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 18:49:12,847 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 18:49:12,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 18:49:12,848 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 18:49:12,848 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 18:49:12,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 18:49:12,849 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 18:49:12,849 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 18:49:12,849 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 18:49:12,849 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 18:49:12,850 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 18:49:12,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 18:49:12,850 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 18:49:12,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 18:49:12,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 18:49:12,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 18:49:12,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 18:49:12,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 18:49:12,852 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 18:49:12,852 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 18:49:12,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 18:49:12,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 18:49:12,852 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 18:49:12,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 18:49:12,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 18:49:12,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 18:49:12,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 18:49:12,853 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 18:49:12,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 18:49:12,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 18:49:12,854 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 18:49:12,882 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 18:49:12,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 18:49:12,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 18:49:12,899 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 18:49:12,899 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 18:49:12,900 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label21.c [2019-10-02 18:49:12,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2de4dbb4a/b030decaed6441e4824a54d2f4d00289/FLAG46339b224 [2019-10-02 18:49:13,520 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 18:49:13,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label21.c [2019-10-02 18:49:13,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2de4dbb4a/b030decaed6441e4824a54d2f4d00289/FLAG46339b224 [2019-10-02 18:49:13,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2de4dbb4a/b030decaed6441e4824a54d2f4d00289 [2019-10-02 18:49:13,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 18:49:13,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 18:49:13,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 18:49:13,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 18:49:13,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 18:49:13,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:49:13" (1/1) ... [2019-10-02 18:49:13,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439f53cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:49:13, skipping insertion in model container [2019-10-02 18:49:13,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:49:13" (1/1) ... [2019-10-02 18:49:13,784 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 18:49:13,849 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 18:49:14,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:49:14,384 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 18:49:14,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:49:14,522 INFO L192 MainTranslator]: Completed translation [2019-10-02 18:49:14,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:49:14 WrapperNode [2019-10-02 18:49:14,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 18:49:14,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 18:49:14,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 18:49:14,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 18:49:14,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:49:14" (1/1) ... [2019-10-02 18:49:14,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:49:14" (1/1) ... [2019-10-02 18:49:14,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:49:14" (1/1) ... [2019-10-02 18:49:14,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:49:14" (1/1) ... [2019-10-02 18:49:14,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:49:14" (1/1) ... [2019-10-02 18:49:14,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:49:14" (1/1) ... [2019-10-02 18:49:14,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:49:14" (1/1) ... [2019-10-02 18:49:14,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 18:49:14,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 18:49:14,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 18:49:14,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 18:49:14,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:49:14" (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 18:49:14,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 18:49:14,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 18:49:14,709 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 18:49:14,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 18:49:14,709 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 18:49:14,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 18:49:14,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 18:49:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 18:49:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 18:49:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 18:49:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 18:49:16,009 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 18:49:16,009 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 18:49:16,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:49:16 BoogieIcfgContainer [2019-10-02 18:49:16,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 18:49:16,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 18:49:16,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 18:49:16,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 18:49:16,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 06:49:13" (1/3) ... [2019-10-02 18:49:16,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c90d2d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:49:16, skipping insertion in model container [2019-10-02 18:49:16,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:49:14" (2/3) ... [2019-10-02 18:49:16,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c90d2d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:49:16, skipping insertion in model container [2019-10-02 18:49:16,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:49:16" (3/3) ... [2019-10-02 18:49:16,019 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label21.c [2019-10-02 18:49:16,029 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 18:49:16,037 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 18:49:16,053 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 18:49:16,077 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 18:49:16,077 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 18:49:16,077 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 18:49:16,077 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 18:49:16,078 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 18:49:16,078 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 18:49:16,078 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 18:49:16,078 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 18:49:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 18:49:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-02 18:49:16,109 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:49:16,110 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] [2019-10-02 18:49:16,112 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:49:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:49:16,118 INFO L82 PathProgramCache]: Analyzing trace with hash -689743650, now seen corresponding path program 1 times [2019-10-02 18:49:16,120 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:49:16,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:49:16,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:49:16,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:49:16,168 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:49:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:49:16,378 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 18:49:16,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:49:16,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 18:49:16,381 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:49:16,386 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 18:49:16,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 18:49:16,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:49:16,404 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-02 18:49:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:49:17,518 INFO L93 Difference]: Finished difference Result 362 states and 555 transitions. [2019-10-02 18:49:17,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 18:49:17,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-10-02 18:49:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:49:17,539 INFO L225 Difference]: With dead ends: 362 [2019-10-02 18:49:17,539 INFO L226 Difference]: Without dead ends: 294 [2019-10-02 18:49:17,544 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:49:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-02 18:49:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-02 18:49:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 18:49:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-02 18:49:17,639 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 33 [2019-10-02 18:49:17,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:49:17,640 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-02 18:49:17,640 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 18:49:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-02 18:49:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-02 18:49:17,645 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:49:17,646 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:49:17,646 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:49:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:49:17,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1458033486, now seen corresponding path program 1 times [2019-10-02 18:49:17,647 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:49:17,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:49:17,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:49:17,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:49:17,649 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:49:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:49:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:49:17,881 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:49:17,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 18:49:17,882 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:49:17,884 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 18:49:17,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 18:49:17,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 18:49:17,885 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-10-02 18:49:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:49:18,887 INFO L93 Difference]: Finished difference Result 600 states and 880 transitions. [2019-10-02 18:49:18,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 18:49:18,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-10-02 18:49:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:49:18,897 INFO L225 Difference]: With dead ends: 600 [2019-10-02 18:49:18,897 INFO L226 Difference]: Without dead ends: 600 [2019-10-02 18:49:18,898 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 18:49:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-02 18:49:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 447. [2019-10-02 18:49:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2019-10-02 18:49:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 661 transitions. [2019-10-02 18:49:18,936 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 661 transitions. Word has length 115 [2019-10-02 18:49:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:49:18,937 INFO L475 AbstractCegarLoop]: Abstraction has 447 states and 661 transitions. [2019-10-02 18:49:18,937 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 18:49:18,937 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 661 transitions. [2019-10-02 18:49:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-02 18:49:18,941 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:49:18,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:49:18,941 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:49:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:49:18,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1013478446, now seen corresponding path program 1 times [2019-10-02 18:49:18,942 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:49:18,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:49:18,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:49:18,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:49:18,944 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:49:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:49:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:49:19,173 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:49:19,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 18:49:19,173 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:49:19,176 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 18:49:19,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 18:49:19,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 18:49:19,177 INFO L87 Difference]: Start difference. First operand 447 states and 661 transitions. Second operand 6 states. [2019-10-02 18:49:20,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:49:20,124 INFO L93 Difference]: Finished difference Result 759 states and 1139 transitions. [2019-10-02 18:49:20,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:49:20,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2019-10-02 18:49:20,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:49:20,131 INFO L225 Difference]: With dead ends: 759 [2019-10-02 18:49:20,131 INFO L226 Difference]: Without dead ends: 759 [2019-10-02 18:49:20,132 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 18:49:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2019-10-02 18:49:20,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 745. [2019-10-02 18:49:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-10-02 18:49:20,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1096 transitions. [2019-10-02 18:49:20,168 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1096 transitions. Word has length 131 [2019-10-02 18:49:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:49:20,169 INFO L475 AbstractCegarLoop]: Abstraction has 745 states and 1096 transitions. [2019-10-02 18:49:20,169 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 18:49:20,169 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1096 transitions. [2019-10-02 18:49:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-02 18:49:20,174 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:49:20,174 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:49:20,175 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:49:20,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:49:20,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1627642498, now seen corresponding path program 1 times [2019-10-02 18:49:20,175 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:49:20,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:49:20,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:49:20,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:49:20,177 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:49:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:49:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:49:20,334 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:49:20,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 18:49:20,335 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:49:20,335 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 18:49:20,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 18:49:20,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 18:49:20,336 INFO L87 Difference]: Start difference. First operand 745 states and 1096 transitions. Second operand 6 states. [2019-10-02 18:49:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:49:21,264 INFO L93 Difference]: Finished difference Result 1075 states and 1530 transitions. [2019-10-02 18:49:21,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:49:21,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-10-02 18:49:21,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:49:21,275 INFO L225 Difference]: With dead ends: 1075 [2019-10-02 18:49:21,276 INFO L226 Difference]: Without dead ends: 1075 [2019-10-02 18:49:21,276 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 18:49:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2019-10-02 18:49:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1047. [2019-10-02 18:49:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2019-10-02 18:49:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1430 transitions. [2019-10-02 18:49:21,331 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1430 transitions. Word has length 155 [2019-10-02 18:49:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:49:21,333 INFO L475 AbstractCegarLoop]: Abstraction has 1047 states and 1430 transitions. [2019-10-02 18:49:21,333 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 18:49:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1430 transitions. [2019-10-02 18:49:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-02 18:49:21,347 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:49:21,347 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, 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 18:49:21,348 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:49:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:49:21,348 INFO L82 PathProgramCache]: Analyzing trace with hash 418106165, now seen corresponding path program 1 times [2019-10-02 18:49:21,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:49:21,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:49:21,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:49:21,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:49:21,353 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:49:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:49:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:49:21,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:49:21,874 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:49:21,875 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 195 with the following transitions: [2019-10-02 18:49:21,877 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], [534], [535], [539], [543], [546], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:49:21,925 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:49:21,926 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:49:33,738 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:49:49,916 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:49:49,919 INFO L272 AbstractInterpreter]: Visited 90 different actions 173 times. Merged at 3 different actions 3 times. Never widened. Performed 307 root evaluator evaluations with a maximum evaluation depth of 16. Performed 307 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 18:49:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:49:49,924 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:50:09,896 INFO L227 lantSequenceWeakener]: Weakened 191 states. On average, predicates are now at 72.99% of their original sizes. [2019-10-02 18:50:09,896 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:50:09,978 INFO L420 sIntCurrentIteration]: We unified 193 AI predicates to 193 [2019-10-02 18:50:09,978 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:50:09,979 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:50:09,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-10-02 18:50:09,979 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:09,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 18:50:09,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 18:50:09,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 18:50:09,981 INFO L87 Difference]: Start difference. First operand 1047 states and 1430 transitions. Second operand 11 states. [2019-10-02 18:53:40,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:53:40,994 INFO L93 Difference]: Finished difference Result 1357 states and 1759 transitions. [2019-10-02 18:53:40,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 18:53:40,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 194 [2019-10-02 18:53:40,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:53:41,001 INFO L225 Difference]: With dead ends: 1357 [2019-10-02 18:53:41,001 INFO L226 Difference]: Without dead ends: 1357 [2019-10-02 18:53:41,002 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 18:53:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2019-10-02 18:53:41,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1190. [2019-10-02 18:53:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2019-10-02 18:53:41,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1580 transitions. [2019-10-02 18:53:41,031 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1580 transitions. Word has length 194 [2019-10-02 18:53:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:53:41,032 INFO L475 AbstractCegarLoop]: Abstraction has 1190 states and 1580 transitions. [2019-10-02 18:53:41,032 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 18:53:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1580 transitions. [2019-10-02 18:53:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-02 18:53:41,037 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:53:41,037 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, 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] [2019-10-02 18:53:41,037 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:53:41,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:53:41,038 INFO L82 PathProgramCache]: Analyzing trace with hash -411764547, now seen corresponding path program 1 times [2019-10-02 18:53:41,038 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:53:41,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:53:41,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:53:41,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:53:41,040 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:53:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:53:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:53:41,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:53:41,206 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:53:41,206 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 231 with the following transitions: [2019-10-02 18:53:41,207 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], [546], [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], [655], [659], [663], [667], [671], [675], [678], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:53:41,213 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:53:41,214 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:54:14,336 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:55:16,326 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:55:16,327 INFO L272 AbstractInterpreter]: Visited 123 different actions 240 times. Merged at 4 different actions 4 times. Never widened. Performed 464 root evaluator evaluations with a maximum evaluation depth of 16. Performed 464 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 18:55:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:55:16,327 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:56:22,859 INFO L227 lantSequenceWeakener]: Weakened 227 states. On average, predicates are now at 72.95% of their original sizes. [2019-10-02 18:56:22,860 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:56:22,987 INFO L420 sIntCurrentIteration]: We unified 229 AI predicates to 229 [2019-10-02 18:56:22,987 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:56:22,987 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:56:22,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-10-02 18:56:22,989 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:56:22,991 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 18:56:22,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 18:56:22,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-02 18:56:22,992 INFO L87 Difference]: Start difference. First operand 1190 states and 1580 transitions. Second operand 12 states.