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_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:19:06,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:19:06,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:19:06,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 20:19:06,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 20:19:06,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 20:19:06,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 20:19:06,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 20:19:06,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 20:19:06,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 20:19:06,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 20:19:06,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 20:19:06,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 20:19:06,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 20:19:06,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 20:19:06,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 20:19:06,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 20:19:06,615 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 20:19:06,629 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:19:06,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:19:06,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:19:06,630 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:19:06,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:19:06,631 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:19:06,631 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:19:06,631 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:19:06,631 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:19:06,631 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:19:06,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:19:06,632 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:19:06,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:19:06,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:19:06,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:19:06,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:19:06,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:19:06,634 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:19:06,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:19:06,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:19:06,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:19:06,634 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:19:06,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:19:06,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:19:06,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:19:06,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:19:06,635 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:19:06,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:19:06,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:19:06,636 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:19:06,664 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:19:06,677 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:19:06,680 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:19:06,681 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:19:06,681 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:19:06,682 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-10-02 20:19:06,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce1a5d9ec/8ed11af653ad4eae95a97a42725c09f8/FLAG1f79081a7 [2019-10-02 20:19:07,306 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:19:07,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-10-02 20:19:07,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce1a5d9ec/8ed11af653ad4eae95a97a42725c09f8/FLAG1f79081a7 [2019-10-02 20:19:07,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce1a5d9ec/8ed11af653ad4eae95a97a42725c09f8 [2019-10-02 20:19:07,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:19:07,580 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:19:07,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:19:07,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:19:07,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:19:07,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:19:07" (1/1) ... [2019-10-02 20:19:07,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40bebede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:19:07, skipping insertion in model container [2019-10-02 20:19:07,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:19:07" (1/1) ... [2019-10-02 20:19:07,597 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:19:07,664 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:19:08,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:19:08,246 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:19:08,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:19:08,422 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:19:08,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:19:08 WrapperNode [2019-10-02 20:19:08,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:19:08,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:19:08,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:19:08,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:19:08,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:19:08" (1/1) ... [2019-10-02 20:19:08,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:19:08" (1/1) ... [2019-10-02 20:19:08,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:19:08" (1/1) ... [2019-10-02 20:19:08,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:19:08" (1/1) ... [2019-10-02 20:19:08,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:19:08" (1/1) ... [2019-10-02 20:19:08,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:19:08" (1/1) ... [2019-10-02 20:19:08,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:19:08" (1/1) ... [2019-10-02 20:19:08,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:19:08,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:19:08,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:19:08,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:19:08,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:19:08" (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 20:19:08,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:19:08,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:19:08,662 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:19:08,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:19:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:19:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:19:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:19:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:19:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:19:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:19:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:19:10,176 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:19:10,176 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:19:10,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:19:10 BoogieIcfgContainer [2019-10-02 20:19:10,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:19:10,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:19:10,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:19:10,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:19:10,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:19:07" (1/3) ... [2019-10-02 20:19:10,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be0ab50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:19:10, skipping insertion in model container [2019-10-02 20:19:10,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:19:08" (2/3) ... [2019-10-02 20:19:10,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be0ab50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:19:10, skipping insertion in model container [2019-10-02 20:19:10,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:19:10" (3/3) ... [2019-10-02 20:19:10,186 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label00.c [2019-10-02 20:19:10,196 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:19:10,204 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:19:10,221 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:19:10,248 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:19:10,248 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:19:10,248 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:19:10,248 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:19:10,249 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:19:10,249 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:19:10,249 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:19:10,249 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:19:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-02 20:19:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-02 20:19:10,285 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:19:10,287 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:19:10,289 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:19:10,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:19:10,294 INFO L82 PathProgramCache]: Analyzing trace with hash -837227006, now seen corresponding path program 1 times [2019-10-02 20:19:10,297 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:19:10,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:10,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:19:10,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:10,347 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:19:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:19:10,609 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 20:19:10,613 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:19:10,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 20:19:10,616 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:19:10,624 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 20:19:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 20:19:10,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 20:19:10,668 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-02 20:19:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:19:11,937 INFO L93 Difference]: Finished difference Result 440 states and 711 transitions. [2019-10-02 20:19:11,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 20:19:11,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-10-02 20:19:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:19:11,976 INFO L225 Difference]: With dead ends: 440 [2019-10-02 20:19:11,977 INFO L226 Difference]: Without dead ends: 372 [2019-10-02 20:19:11,980 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 20:19:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-02 20:19:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-02 20:19:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-02 20:19:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-02 20:19:12,089 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 59 [2019-10-02 20:19:12,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:19:12,090 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-02 20:19:12,090 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 20:19:12,090 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-02 20:19:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-02 20:19:12,097 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:19:12,097 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 20:19:12,098 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:19:12,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:19:12,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1547926855, now seen corresponding path program 1 times [2019-10-02 20:19:12,098 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:19:12,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:12,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:19:12,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:12,100 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:19:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:19:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:19:12,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:19:12,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:19:12,403 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:19:12,405 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:19:12,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:19:12,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:19:12,405 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-02 20:19:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:19:13,755 INFO L93 Difference]: Finished difference Result 756 states and 1199 transitions. [2019-10-02 20:19:13,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:19:13,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2019-10-02 20:19:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:19:13,768 INFO L225 Difference]: With dead ends: 756 [2019-10-02 20:19:13,768 INFO L226 Difference]: Without dead ends: 756 [2019-10-02 20:19:13,769 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 20:19:13,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-10-02 20:19:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-10-02 20:19:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-10-02 20:19:13,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-10-02 20:19:13,812 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 128 [2019-10-02 20:19:13,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:19:13,812 INFO L475 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-10-02 20:19:13,812 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:19:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-10-02 20:19:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-02 20:19:13,818 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:19:13,818 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 20:19:13,819 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:19:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:19:13,819 INFO L82 PathProgramCache]: Analyzing trace with hash -186094754, now seen corresponding path program 1 times [2019-10-02 20:19:13,819 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:19:13,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:13,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:19:13,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:13,821 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:19:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:19:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:19:13,952 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:19:13,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:19:13,952 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:19:13,956 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:19:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:19:13,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:19:13,956 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-10-02 20:19:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:19:15,356 INFO L93 Difference]: Finished difference Result 1158 states and 1699 transitions. [2019-10-02 20:19:15,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:19:15,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2019-10-02 20:19:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:19:15,364 INFO L225 Difference]: With dead ends: 1158 [2019-10-02 20:19:15,364 INFO L226 Difference]: Without dead ends: 1158 [2019-10-02 20:19:15,365 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 20:19:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-10-02 20:19:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-10-02 20:19:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-10-02 20:19:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-10-02 20:19:15,410 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 129 [2019-10-02 20:19:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:19:15,410 INFO L475 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-10-02 20:19:15,410 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:19:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-10-02 20:19:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-02 20:19:15,416 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:19:15,416 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 20:19:15,416 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:19:15,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:19:15,417 INFO L82 PathProgramCache]: Analyzing trace with hash -547188926, now seen corresponding path program 1 times [2019-10-02 20:19:15,417 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:19:15,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:15,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:19:15,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:15,418 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:19:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:19:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:19:15,508 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:19:15,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:19:15,509 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:19:15,509 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:19:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:19:15,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:19:15,510 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-10-02 20:19:16,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:19:16,675 INFO L93 Difference]: Finished difference Result 1750 states and 2413 transitions. [2019-10-02 20:19:16,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 20:19:16,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-10-02 20:19:16,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:19:16,691 INFO L225 Difference]: With dead ends: 1750 [2019-10-02 20:19:16,692 INFO L226 Difference]: Without dead ends: 1750 [2019-10-02 20:19:16,693 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 20:19:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2019-10-02 20:19:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1514. [2019-10-02 20:19:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2019-10-02 20:19:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2084 transitions. [2019-10-02 20:19:16,764 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2084 transitions. Word has length 131 [2019-10-02 20:19:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:19:16,766 INFO L475 AbstractCegarLoop]: Abstraction has 1514 states and 2084 transitions. [2019-10-02 20:19:16,766 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:19:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2084 transitions. [2019-10-02 20:19:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-02 20:19:16,770 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:19:16,770 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 20:19:16,770 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:19:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:19:16,771 INFO L82 PathProgramCache]: Analyzing trace with hash -252421119, now seen corresponding path program 1 times [2019-10-02 20:19:16,771 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:19:16,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:16,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:19:16,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:16,775 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:19:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:19:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:19:16,949 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:19:16,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:19:16,949 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:19:16,950 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:19:16,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:19:16,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:19:16,951 INFO L87 Difference]: Start difference. First operand 1514 states and 2084 transitions. Second operand 4 states. [2019-10-02 20:19:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:19:18,669 INFO L93 Difference]: Finished difference Result 3176 states and 4205 transitions. [2019-10-02 20:19:18,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:19:18,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-10-02 20:19:18,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:19:18,688 INFO L225 Difference]: With dead ends: 3176 [2019-10-02 20:19:18,689 INFO L226 Difference]: Without dead ends: 3176 [2019-10-02 20:19:18,689 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:19:18,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2019-10-02 20:19:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2262. [2019-10-02 20:19:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2262 states. [2019-10-02 20:19:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3060 transitions. [2019-10-02 20:19:18,771 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3060 transitions. Word has length 132 [2019-10-02 20:19:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:19:18,772 INFO L475 AbstractCegarLoop]: Abstraction has 2262 states and 3060 transitions. [2019-10-02 20:19:18,772 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:19:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3060 transitions. [2019-10-02 20:19:18,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-10-02 20:19:18,781 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:19:18,781 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:19:18,782 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:19:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:19:18,782 INFO L82 PathProgramCache]: Analyzing trace with hash 382896273, now seen corresponding path program 1 times [2019-10-02 20:19:18,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:19:18,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:18,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:19:18,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:19:18,787 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:19:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:19:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 165 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:19:19,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:19:19,233 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:19:19,234 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 325 with the following transitions: [2019-10-02 20:19:19,236 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], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [381], [383], [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], [655], [659], [663], [666], [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], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:19:19,288 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:19:19,288 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:19:35,280 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:19:35,282 INFO L272 AbstractInterpreter]: Visited 158 different actions 158 times. Never merged. Never widened. Performed 355 root evaluator evaluations with a maximum evaluation depth of 14. Performed 355 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 20:19:35,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:19:35,286 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:19:52,086 INFO L227 lantSequenceWeakener]: Weakened 305 states. On average, predicates are now at 77.98% of their original sizes. [2019-10-02 20:19:52,086 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:19:52,204 INFO L420 sIntCurrentIteration]: We unified 323 AI predicates to 323 [2019-10-02 20:19:52,204 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:19:52,205 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:19:52,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2019-10-02 20:19:52,206 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:19:52,206 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 20:19:52,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 20:19:52,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-02 20:19:52,207 INFO L87 Difference]: Start difference. First operand 2262 states and 3060 transitions. Second operand 12 states. [2019-10-02 20:22:08,812 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:24:27,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:24:27,193 INFO L93 Difference]: Finished difference Result 2266 states and 3041 transitions. [2019-10-02 20:24:27,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 20:24:27,193 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 324 [2019-10-02 20:24:27,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:24:27,205 INFO L225 Difference]: With dead ends: 2266 [2019-10-02 20:24:27,205 INFO L226 Difference]: Without dead ends: 2266 [2019-10-02 20:24:27,205 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-10-02 20:24:27,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2019-10-02 20:24:27,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2262. [2019-10-02 20:24:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2262 states. [2019-10-02 20:24:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3034 transitions. [2019-10-02 20:24:27,255 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3034 transitions. Word has length 324 [2019-10-02 20:24:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:24:27,256 INFO L475 AbstractCegarLoop]: Abstraction has 2262 states and 3034 transitions. [2019-10-02 20:24:27,256 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 20:24:27,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3034 transitions. [2019-10-02 20:24:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-10-02 20:24:27,267 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:24:27,268 INFO L411 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, 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, 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, 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] [2019-10-02 20:24:27,268 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:24:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:24:27,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1608334599, now seen corresponding path program 1 times [2019-10-02 20:24:27,269 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:24:27,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:24:27,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:24:27,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:24:27,271 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:24:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:24:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 242 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 20:24:28,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:24:28,080 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:24:28,081 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 409 with the following transitions: [2019-10-02 20:24:28,081 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], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [381], [383], [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], [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], [666], [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], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:24:28,089 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:24:28,089 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:24:49,555 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:24:49,556 INFO L272 AbstractInterpreter]: Visited 162 different actions 319 times. Merged at 4 different actions 5 times. Never widened. Performed 607 root evaluator evaluations with a maximum evaluation depth of 14. Performed 607 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 20:24:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:24:49,557 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:24:57,944 INFO L227 lantSequenceWeakener]: Weakened 405 states. On average, predicates are now at 77.75% of their original sizes. [2019-10-02 20:24:57,945 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:24:58,032 INFO L420 sIntCurrentIteration]: We unified 407 AI predicates to 407 [2019-10-02 20:24:58,032 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:24:58,032 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:24:58,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2019-10-02 20:24:58,033 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:24:58,034 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 20:24:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 20:24:58,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-02 20:24:58,035 INFO L87 Difference]: Start difference. First operand 2262 states and 3034 transitions. Second operand 12 states. [2019-10-02 20:25:33,893 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:25:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:25:59,960 INFO L93 Difference]: Finished difference Result 2478 states and 3250 transitions. [2019-10-02 20:25:59,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 20:25:59,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 408 [2019-10-02 20:25:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:25:59,970 INFO L225 Difference]: With dead ends: 2478 [2019-10-02 20:25:59,970 INFO L226 Difference]: Without dead ends: 2263 [2019-10-02 20:25:59,971 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-10-02 20:25:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2019-10-02 20:26:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2262. [2019-10-02 20:26:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2262 states. [2019-10-02 20:26:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3028 transitions. [2019-10-02 20:26:00,021 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3028 transitions. Word has length 408 [2019-10-02 20:26:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:26:00,022 INFO L475 AbstractCegarLoop]: Abstraction has 2262 states and 3028 transitions. [2019-10-02 20:26:00,022 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 20:26:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3028 transitions. [2019-10-02 20:26:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2019-10-02 20:26:00,032 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:26:00,033 INFO L411 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, 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, 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, 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] [2019-10-02 20:26:00,033 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:26:00,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:26:00,034 INFO L82 PathProgramCache]: Analyzing trace with hash 433635045, now seen corresponding path program 1 times [2019-10-02 20:26:00,034 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:26:00,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:26:00,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:26:00,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:26:00,036 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:26:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:26:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 213 proven. 222 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-02 20:26:00,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:26:00,663 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:26:00,663 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 435 with the following transitions: [2019-10-02 20:26:00,664 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], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [381], [383], [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], [655], [658], [659], [663], [666], [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], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:26:00,677 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:26:00,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:26:30,187 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:26:30,188 INFO L272 AbstractInterpreter]: Visited 162 different actions 319 times. Merged at 4 different actions 5 times. Never widened. Performed 729 root evaluator evaluations with a maximum evaluation depth of 14. Performed 729 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 20:26:30,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:26:30,188 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:26:50,609 INFO L227 lantSequenceWeakener]: Weakened 431 states. On average, predicates are now at 77.72% of their original sizes. [2019-10-02 20:26:50,609 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:26:50,726 INFO L420 sIntCurrentIteration]: We unified 433 AI predicates to 433 [2019-10-02 20:26:50,726 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:26:50,727 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:26:50,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2019-10-02 20:26:50,727 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:26:50,728 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 20:26:50,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 20:26:50,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-02 20:26:50,729 INFO L87 Difference]: Start difference. First operand 2262 states and 3028 transitions. Second operand 13 states. [2019-10-02 20:27:38,538 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:30:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:30:58,688 INFO L93 Difference]: Finished difference Result 2446 states and 3220 transitions. [2019-10-02 20:30:58,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 20:30:58,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 434 [2019-10-02 20:30:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:30:58,699 INFO L225 Difference]: With dead ends: 2446 [2019-10-02 20:30:58,699 INFO L226 Difference]: Without dead ends: 2446 [2019-10-02 20:30:58,700 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2019-10-02 20:30:58,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2019-10-02 20:30:58,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2444. [2019-10-02 20:30:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2444 states. [2019-10-02 20:30:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 3218 transitions. [2019-10-02 20:30:58,750 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 3218 transitions. Word has length 434 [2019-10-02 20:30:58,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:30:58,751 INFO L475 AbstractCegarLoop]: Abstraction has 2444 states and 3218 transitions. [2019-10-02 20:30:58,751 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 20:30:58,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 3218 transitions. [2019-10-02 20:30:58,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2019-10-02 20:30:58,765 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:30:58,765 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2019-10-02 20:30:58,766 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:30:58,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:30:58,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1769415774, now seen corresponding path program 1 times [2019-10-02 20:30:58,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:30:58,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:30:58,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:30:58,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:30:58,768 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:30:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:30:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 314 proven. 483 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 20:30:59,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:30:59,665 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:30:59,666 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 522 with the following transitions: [2019-10-02 20:30:59,666 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], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [381], [383], [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], [566], [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], [666], [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], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:30:59,669 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:30:59,669 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:31:37,509 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-02 20:31:37,509 INFO L272 AbstractInterpreter]: Visited 164 different actions 482 times. Merged at 6 different actions 12 times. Never widened. Performed 929 root evaluator evaluations with a maximum evaluation depth of 14. Performed 929 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2019-10-02 20:31:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:31:37,511 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-02 20:31:37,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:31:37,511 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 20:31:37,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:31:37,532 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-02 20:31:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:31:37,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-02 20:31:37,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 20:31:37,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-02 20:31:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 529 proven. 135 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2019-10-02 20:31:38,180 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-02 20:31:38,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-02 20:31:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 227 proven. 486 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-02 20:31:38,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-02 20:31:38,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 24 [2019-10-02 20:31:38,990 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-02 20:31:38,991 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-02 20:31:38,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-02 20:31:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2019-10-02 20:31:38,992 INFO L87 Difference]: Start difference. First operand 2444 states and 3218 transitions. Second operand 19 states. [2019-10-02 20:31:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:31:43,782 INFO L93 Difference]: Finished difference Result 2731 states and 3564 transitions. [2019-10-02 20:31:43,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-02 20:31:43,782 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 521 [2019-10-02 20:31:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:31:43,795 INFO L225 Difference]: With dead ends: 2731 [2019-10-02 20:31:43,796 INFO L226 Difference]: Without dead ends: 2682 [2019-10-02 20:31:43,797 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1058 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=546, Invalid=1806, Unknown=0, NotChecked=0, Total=2352 [2019-10-02 20:31:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2019-10-02 20:31:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2628. [2019-10-02 20:31:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2628 states. [2019-10-02 20:31:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 3142 transitions. [2019-10-02 20:31:43,854 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 3142 transitions. Word has length 521 [2019-10-02 20:31:43,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:31:43,855 INFO L475 AbstractCegarLoop]: Abstraction has 2628 states and 3142 transitions. [2019-10-02 20:31:43,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-02 20:31:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 3142 transitions. [2019-10-02 20:31:43,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2019-10-02 20:31:43,871 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:31:43,871 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-10-02 20:31:43,872 INFO L418 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:31:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:31:43,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2012438250, now seen corresponding path program 1 times [2019-10-02 20:31:43,872 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:31:43,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:31:43,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:31:43,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:31:43,874 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:31:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:31:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 436 proven. 112 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-10-02 20:31:44,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:31:44,487 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:31:44,488 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 544 with the following transitions: [2019-10-02 20:31:44,488 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], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [381], [383], [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], [666], [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], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:31:44,491 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:31:44,491 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:32:04,617 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:32:44,615 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:32:44,616 INFO L272 AbstractInterpreter]: Visited 163 different actions 640 times. Merged at 6 different actions 18 times. Never widened. Performed 1126 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1126 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2019-10-02 20:32:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:32:44,616 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:33:00,749 INFO L227 lantSequenceWeakener]: Weakened 540 states. On average, predicates are now at 77.64% of their original sizes. [2019-10-02 20:33:00,749 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:33:00,814 INFO L420 sIntCurrentIteration]: We unified 542 AI predicates to 542 [2019-10-02 20:33:00,814 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:33:00,814 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:33:00,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-10-02 20:33:00,815 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:33:00,815 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:33:00,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:33:00,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:33:00,816 INFO L87 Difference]: Start difference. First operand 2628 states and 3142 transitions. Second operand 10 states.