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/Problem03_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 17:50:36,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 17:50:36,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 17:50:36,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 17:50:36,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 17:50:36,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 17:50:36,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 17:50:36,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 17:50:36,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 17:50:36,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 17:50:36,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 17:50:36,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 17:50:36,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 17:50:36,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 17:50:36,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 17:50:36,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 17:50:36,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 17:50:36,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 17:50:36,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 17:50:36,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 17:50:36,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 17:50:36,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 17:50:36,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 17:50:36,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 17:50:36,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2019-10-02 17:50:36,746 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 17:50:36,761 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 17:50:36,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 17:50:36,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 17:50:36,761 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 17:50:36,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 17:50:36,762 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 17:50:36,763 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 17:50:36,763 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 17:50:36,763 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 17:50:36,763 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 17:50:36,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 17:50:36,764 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 17:50:36,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 17:50:36,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 17:50:36,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 17:50:36,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 17:50:36,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 17:50:36,765 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 17:50:36,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 17:50:36,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 17:50:36,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 17:50:36,766 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 17:50:36,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 17:50:36,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:50:36,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 17:50:36,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 17:50:36,768 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 17:50:36,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 17:50:36,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 17:50:36,769 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 17:50:36,820 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 17:50:36,833 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 17:50:36,836 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 17:50:36,838 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 17:50:36,838 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 17:50:36,839 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2019-10-02 17:50:36,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe7d0580/9e59899245d647e698092e43a6dce768/FLAGe524a0278 [2019-10-02 17:50:37,513 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 17:50:37,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2019-10-02 17:50:37,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe7d0580/9e59899245d647e698092e43a6dce768/FLAGe524a0278 [2019-10-02 17:50:37,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe7d0580/9e59899245d647e698092e43a6dce768 [2019-10-02 17:50:37,732 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 17:50:37,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 17:50:37,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 17:50:37,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 17:50:37,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 17:50:37,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:50:37" (1/1) ... [2019-10-02 17:50:37,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35da1448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:50:37, skipping insertion in model container [2019-10-02 17:50:37,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:50:37" (1/1) ... [2019-10-02 17:50:37,748 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 17:50:37,829 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 17:50:38,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:50:38,633 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 17:50:38,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:50:38,952 INFO L192 MainTranslator]: Completed translation [2019-10-02 17:50:38,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:50:38 WrapperNode [2019-10-02 17:50:38,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 17:50:38,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 17:50:38,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 17:50:38,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 17:50:38,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:50:38" (1/1) ... [2019-10-02 17:50:38,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:50:38" (1/1) ... [2019-10-02 17:50:39,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:50:38" (1/1) ... [2019-10-02 17:50:39,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:50:38" (1/1) ... [2019-10-02 17:50:39,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:50:38" (1/1) ... [2019-10-02 17:50:39,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:50:38" (1/1) ... [2019-10-02 17:50:39,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:50:38" (1/1) ... [2019-10-02 17:50:39,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 17:50:39,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 17:50:39,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 17:50:39,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 17:50:39,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:50:38" (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 17:50:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 17:50:39,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 17:50:39,217 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 17:50:39,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 17:50:39,218 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 17:50:39,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 17:50:39,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 17:50:39,218 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 17:50:39,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 17:50:39,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 17:50:39,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 17:50:41,143 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 17:50:41,143 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 17:50:41,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:50:41 BoogieIcfgContainer [2019-10-02 17:50:41,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 17:50:41,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 17:50:41,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 17:50:41,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 17:50:41,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 05:50:37" (1/3) ... [2019-10-02 17:50:41,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310ebc88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:50:41, skipping insertion in model container [2019-10-02 17:50:41,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:50:38" (2/3) ... [2019-10-02 17:50:41,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310ebc88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:50:41, skipping insertion in model container [2019-10-02 17:50:41,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:50:41" (3/3) ... [2019-10-02 17:50:41,153 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label22.c [2019-10-02 17:50:41,163 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 17:50:41,172 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 17:50:41,189 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 17:50:41,224 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 17:50:41,225 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 17:50:41,226 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 17:50:41,226 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 17:50:41,226 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 17:50:41,226 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 17:50:41,226 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 17:50:41,226 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 17:50:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-02 17:50:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-02 17:50:41,289 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:50:41,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:50:41,293 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:50:41,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:50:41,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1955035064, now seen corresponding path program 1 times [2019-10-02 17:50:41,302 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:50:41,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:41,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:50:41,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:41,363 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:50:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:50:42,186 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 17:50:42,189 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:50:42,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:50:42,189 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:50:42,196 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:50:42,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:50:42,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:50:42,215 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-10-02 17:50:43,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:50:43,677 INFO L93 Difference]: Finished difference Result 530 states and 840 transitions. [2019-10-02 17:50:43,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:50:43,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-10-02 17:50:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:50:43,698 INFO L225 Difference]: With dead ends: 530 [2019-10-02 17:50:43,698 INFO L226 Difference]: Without dead ends: 462 [2019-10-02 17:50:43,700 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 17:50:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-10-02 17:50:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2019-10-02 17:50:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-10-02 17:50:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 739 transitions. [2019-10-02 17:50:43,783 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 739 transitions. Word has length 173 [2019-10-02 17:50:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:50:43,784 INFO L475 AbstractCegarLoop]: Abstraction has 460 states and 739 transitions. [2019-10-02 17:50:43,785 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:50:43,785 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 739 transitions. [2019-10-02 17:50:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-02 17:50:43,791 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:50:43,791 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:50:43,792 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:50:43,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:50:43,792 INFO L82 PathProgramCache]: Analyzing trace with hash -209024133, now seen corresponding path program 1 times [2019-10-02 17:50:43,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:50:43,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:43,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:50:43,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:43,795 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:50:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:50:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:50:43,946 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:50:43,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:50:43,946 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:50:43,948 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:50:43,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:50:43,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:50:43,949 INFO L87 Difference]: Start difference. First operand 460 states and 739 transitions. Second operand 6 states. [2019-10-02 17:50:45,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:50:45,713 INFO L93 Difference]: Finished difference Result 937 states and 1533 transitions. [2019-10-02 17:50:45,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 17:50:45,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 182 [2019-10-02 17:50:45,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:50:45,724 INFO L225 Difference]: With dead ends: 937 [2019-10-02 17:50:45,724 INFO L226 Difference]: Without dead ends: 937 [2019-10-02 17:50:45,725 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 17:50:45,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2019-10-02 17:50:45,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 899. [2019-10-02 17:50:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-10-02 17:50:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1431 transitions. [2019-10-02 17:50:45,802 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1431 transitions. Word has length 182 [2019-10-02 17:50:45,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:50:45,804 INFO L475 AbstractCegarLoop]: Abstraction has 899 states and 1431 transitions. [2019-10-02 17:50:45,804 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:50:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1431 transitions. [2019-10-02 17:50:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-02 17:50:45,815 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:50:45,816 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:50:45,816 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:50:45,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:50:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash -963709492, now seen corresponding path program 1 times [2019-10-02 17:50:45,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:50:45,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:45,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:50:45,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:45,819 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:50:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:50:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:50:46,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:50:46,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:50:46,094 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:50:46,095 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:50:46,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:50:46,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:50:46,096 INFO L87 Difference]: Start difference. First operand 899 states and 1431 transitions. Second operand 3 states. [2019-10-02 17:50:47,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:50:47,197 INFO L93 Difference]: Finished difference Result 1742 states and 2663 transitions. [2019-10-02 17:50:47,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:50:47,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2019-10-02 17:50:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:50:47,215 INFO L225 Difference]: With dead ends: 1742 [2019-10-02 17:50:47,215 INFO L226 Difference]: Without dead ends: 1742 [2019-10-02 17:50:47,216 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 17:50:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2019-10-02 17:50:47,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1737. [2019-10-02 17:50:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1737 states. [2019-10-02 17:50:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2653 transitions. [2019-10-02 17:50:47,294 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2653 transitions. Word has length 185 [2019-10-02 17:50:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:50:47,303 INFO L475 AbstractCegarLoop]: Abstraction has 1737 states and 2653 transitions. [2019-10-02 17:50:47,303 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:50:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2653 transitions. [2019-10-02 17:50:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-10-02 17:50:47,313 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:50:47,314 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:50:47,315 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:50:47,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:50:47,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1171011483, now seen corresponding path program 1 times [2019-10-02 17:50:47,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:50:47,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:47,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:50:47,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:47,318 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:50:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:50:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:50:47,662 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:50:47,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:50:47,662 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:50:47,663 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:50:47,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:50:47,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:50:47,664 INFO L87 Difference]: Start difference. First operand 1737 states and 2653 transitions. Second operand 3 states. [2019-10-02 17:50:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:50:48,762 INFO L93 Difference]: Finished difference Result 3427 states and 5300 transitions. [2019-10-02 17:50:48,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:50:48,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2019-10-02 17:50:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:50:48,789 INFO L225 Difference]: With dead ends: 3427 [2019-10-02 17:50:48,790 INFO L226 Difference]: Without dead ends: 3427 [2019-10-02 17:50:48,790 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 17:50:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2019-10-02 17:50:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3405. [2019-10-02 17:50:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3405 states. [2019-10-02 17:50:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 5256 transitions. [2019-10-02 17:50:48,895 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 5256 transitions. Word has length 205 [2019-10-02 17:50:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:50:48,896 INFO L475 AbstractCegarLoop]: Abstraction has 3405 states and 5256 transitions. [2019-10-02 17:50:48,897 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:50:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 5256 transitions. [2019-10-02 17:50:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-10-02 17:50:48,911 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:50:48,911 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:50:48,912 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:50:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:50:48,912 INFO L82 PathProgramCache]: Analyzing trace with hash -128205864, now seen corresponding path program 1 times [2019-10-02 17:50:48,912 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:50:48,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:48,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:50:48,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:48,914 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:50:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:50:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:50:49,267 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:50:49,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-02 17:50:49,267 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:50:49,268 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 17:50:49,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 17:50:49,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 17:50:49,269 INFO L87 Difference]: Start difference. First operand 3405 states and 5256 transitions. Second operand 7 states. [2019-10-02 17:50:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:50:51,975 INFO L93 Difference]: Finished difference Result 10476 states and 19346 transitions. [2019-10-02 17:50:51,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 17:50:51,975 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2019-10-02 17:50:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:50:52,096 INFO L225 Difference]: With dead ends: 10476 [2019-10-02 17:50:52,096 INFO L226 Difference]: Without dead ends: 10476 [2019-10-02 17:50:52,097 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-10-02 17:50:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10476 states. [2019-10-02 17:50:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10476 to 10288. [2019-10-02 17:50:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10288 states. [2019-10-02 17:50:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10288 states to 10288 states and 16830 transitions. [2019-10-02 17:50:52,526 INFO L78 Accepts]: Start accepts. Automaton has 10288 states and 16830 transitions. Word has length 250 [2019-10-02 17:50:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:50:52,526 INFO L475 AbstractCegarLoop]: Abstraction has 10288 states and 16830 transitions. [2019-10-02 17:50:52,526 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 17:50:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 10288 states and 16830 transitions. [2019-10-02 17:50:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-10-02 17:50:52,574 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:50:52,574 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:50:52,575 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:50:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:50:52,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1276991200, now seen corresponding path program 1 times [2019-10-02 17:50:52,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:50:52,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:52,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:50:52,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:50:52,580 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:50:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:50:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:50:52,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 17:50:52,983 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 17:50:52,984 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 265 with the following transitions: [2019-10-02 17:50:52,988 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [36], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [315], [318], [322], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [853], [855], [1157], [1161], [1170], [1174], [1176], [1181], [1182], [1183], [1185], [1186] [2019-10-02 17:50:53,073 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 17:50:53,074 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)