java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:50:02,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:50:02,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:50:02,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:50:02,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 19:50:02,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 19:50:02,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 19:50:02,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 19:50:02,203 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:50:02,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:50:02,204 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:50:02,204 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:50:02,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:50:02,205 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:50:02,205 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:50:02,205 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:50:02,205 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:50:02,205 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:50:02,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:50:02,206 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:50:02,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:50:02,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:50:02,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:50:02,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:50:02,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:50:02,208 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:50:02,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:50:02,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:50:02,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:50:02,208 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:50:02,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:50:02,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:50:02,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:50:02,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:50:02,209 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:50:02,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:50:02,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:50:02,210 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:50:02,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:50:02,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:50:02,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:50:02,260 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:50:02,260 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:50:02,261 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label43.c [2019-10-02 19:50:02,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010347484/9a5a7083a80749edb95d0c511b313420/FLAG8237d64dc [2019-10-02 19:50:02,902 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:50:02,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label43.c [2019-10-02 19:50:02,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010347484/9a5a7083a80749edb95d0c511b313420/FLAG8237d64dc [2019-10-02 19:50:03,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010347484/9a5a7083a80749edb95d0c511b313420 [2019-10-02 19:50:03,100 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:50:03,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:50:03,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:50:03,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:50:03,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:50:03,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:50:03" (1/1) ... [2019-10-02 19:50:03,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5f6572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:03, skipping insertion in model container [2019-10-02 19:50:03,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:50:03" (1/1) ... [2019-10-02 19:50:03,117 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:50:03,170 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:50:03,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:50:03,953 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:50:04,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:50:04,297 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:50:04,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:04 WrapperNode [2019-10-02 19:50:04,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:50:04,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:50:04,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:50:04,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:50:04,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:04" (1/1) ... [2019-10-02 19:50:04,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:04" (1/1) ... [2019-10-02 19:50:04,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:04" (1/1) ... [2019-10-02 19:50:04,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:04" (1/1) ... [2019-10-02 19:50:04,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:04" (1/1) ... [2019-10-02 19:50:04,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:04" (1/1) ... [2019-10-02 19:50:04,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:04" (1/1) ... [2019-10-02 19:50:04,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:50:04,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:50:04,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:50:04,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:50:04,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:50:04,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:50:04,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:50:04,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:50:04,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:50:04,562 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:50:04,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:50:04,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:50:04,563 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:50:04,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:50:04,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:50:04,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:50:06,349 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:50:06,350 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:50:06,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:50:06 BoogieIcfgContainer [2019-10-02 19:50:06,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:50:06,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:50:06,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:50:06,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:50:06,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:50:03" (1/3) ... [2019-10-02 19:50:06,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204b5028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:50:06, skipping insertion in model container [2019-10-02 19:50:06,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:50:04" (2/3) ... [2019-10-02 19:50:06,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204b5028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:50:06, skipping insertion in model container [2019-10-02 19:50:06,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:50:06" (3/3) ... [2019-10-02 19:50:06,363 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label43.c [2019-10-02 19:50:06,374 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:50:06,388 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:50:06,407 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:50:06,444 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:50:06,444 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:50:06,445 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:50:06,445 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:50:06,445 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:50:06,445 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:50:06,445 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:50:06,446 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:50:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-02 19:50:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-02 19:50:06,481 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:50:06,482 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:50:06,484 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:50:06,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:50:06,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1328885261, now seen corresponding path program 1 times [2019-10-02 19:50:06,491 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:50:06,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:06,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:50:06,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:06,538 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:50:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:50:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:50:06,816 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:50:06,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 19:50:06,817 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:50:06,823 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 19:50:06,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 19:50:06,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:50:06,842 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-02 19:50:08,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:50:08,306 INFO L93 Difference]: Finished difference Result 493 states and 793 transitions. [2019-10-02 19:50:08,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 19:50:08,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-02 19:50:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:50:08,341 INFO L225 Difference]: With dead ends: 493 [2019-10-02 19:50:08,342 INFO L226 Difference]: Without dead ends: 425 [2019-10-02 19:50:08,345 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 19:50:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-02 19:50:08,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-02 19:50:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-02 19:50:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 666 transitions. [2019-10-02 19:50:08,432 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 666 transitions. Word has length 18 [2019-10-02 19:50:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:50:08,433 INFO L475 AbstractCegarLoop]: Abstraction has 420 states and 666 transitions. [2019-10-02 19:50:08,433 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 19:50:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 666 transitions. [2019-10-02 19:50:08,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-02 19:50:08,437 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:50:08,438 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 19:50:08,438 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:50:08,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:50:08,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1087943286, now seen corresponding path program 1 times [2019-10-02 19:50:08,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:50:08,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:08,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:50:08,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:08,441 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:50:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:50:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:50:08,702 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:50:08,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:50:08,702 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:50:08,704 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:50:08,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:50:08,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:50:08,705 INFO L87 Difference]: Start difference. First operand 420 states and 666 transitions. Second operand 6 states. [2019-10-02 19:50:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:50:11,374 INFO L93 Difference]: Finished difference Result 1251 states and 1866 transitions. [2019-10-02 19:50:11,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 19:50:11,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2019-10-02 19:50:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:50:11,386 INFO L225 Difference]: With dead ends: 1251 [2019-10-02 19:50:11,386 INFO L226 Difference]: Without dead ends: 1251 [2019-10-02 19:50:11,387 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:50:11,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-10-02 19:50:11,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1217. [2019-10-02 19:50:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2019-10-02 19:50:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1739 transitions. [2019-10-02 19:50:11,463 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1739 transitions. Word has length 88 [2019-10-02 19:50:11,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:50:11,463 INFO L475 AbstractCegarLoop]: Abstraction has 1217 states and 1739 transitions. [2019-10-02 19:50:11,463 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:50:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1739 transitions. [2019-10-02 19:50:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-02 19:50:11,467 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:50:11,468 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 19:50:11,468 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:50:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:50:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash 492940226, now seen corresponding path program 1 times [2019-10-02 19:50:11,469 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:50:11,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:11,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:50:11,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:11,471 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:50:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:50:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:50:11,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:50:11,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:50:11,653 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:50:11,654 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:50:11,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:50:11,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:50:11,655 INFO L87 Difference]: Start difference. First operand 1217 states and 1739 transitions. Second operand 6 states. [2019-10-02 19:50:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:50:13,302 INFO L93 Difference]: Finished difference Result 2239 states and 3085 transitions. [2019-10-02 19:50:13,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:50:13,303 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-10-02 19:50:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:50:13,316 INFO L225 Difference]: With dead ends: 2239 [2019-10-02 19:50:13,317 INFO L226 Difference]: Without dead ends: 2239 [2019-10-02 19:50:13,317 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-02 19:50:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2019-10-02 19:50:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 2212. [2019-10-02 19:50:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-10-02 19:50:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3012 transitions. [2019-10-02 19:50:13,394 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3012 transitions. Word has length 98 [2019-10-02 19:50:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:50:13,395 INFO L475 AbstractCegarLoop]: Abstraction has 2212 states and 3012 transitions. [2019-10-02 19:50:13,395 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:50:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3012 transitions. [2019-10-02 19:50:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-02 19:50:13,400 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:50:13,401 INFO L411 BasicCegarLoop]: trace histogram [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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:50:13,401 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:50:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:50:13,401 INFO L82 PathProgramCache]: Analyzing trace with hash 610166376, now seen corresponding path program 1 times [2019-10-02 19:50:13,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:50:13,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:13,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:50:13,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:50:13,403 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:50:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:50:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:50:13,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:50:13,567 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:50:13,568 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 162 with the following transitions: [2019-10-02 19:50:13,571 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [510], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-10-02 19:50:13,649 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:50:13,649 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:50:39,430 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:50:39,432 INFO L272 AbstractInterpreter]: Visited 78 different actions 78 times. Never merged. Never widened. Performed 205 root evaluator evaluations with a maximum evaluation depth of 16. Performed 205 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 28 variables. [2019-10-02 19:50:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:50:39,436 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:51:17,995 INFO L227 lantSequenceWeakener]: Weakened 142 states. On average, predicates are now at 73.24% of their original sizes. [2019-10-02 19:51:17,995 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:51:18,078 INFO L420 sIntCurrentIteration]: We unified 160 AI predicates to 160 [2019-10-02 19:51:18,079 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:51:18,080 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:51:18,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 19:51:18,081 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:51:18,081 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:51:18,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:51:18,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:51:18,084 INFO L87 Difference]: Start difference. First operand 2212 states and 3012 transitions. Second operand 10 states.