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/Problem12_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:03:17,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:03:17,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:03:17,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 20:03:17,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 20:03:17,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 20:03:17,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 20:03:17,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 20:03:17,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 20:03:17,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 20:03:17,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 20:03:17,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 20:03:17,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 20:03:17,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 20:03:17,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 20:03:17,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 20:03:17,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 20:03:17,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 20:03:17,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 20:03:17,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 20:03:17,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 20:03:17,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 20:03:17,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 20:03:17,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 20:03:17,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 20:03:17,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 20:03:17,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 20:03:17,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 20:03:17,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 20:03:17,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 20:03:17,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 20:03:17,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 20:03:17,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 20:03:17,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 20:03:17,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 20:03:17,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 20:03:17,727 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 20:03:17,757 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:03:17,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:03:17,757 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:03:17,758 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:03:17,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:03:17,760 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:03:17,760 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:03:17,760 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:03:17,761 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:03:17,761 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:03:17,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:03:17,763 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:03:17,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:03:17,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:03:17,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:03:17,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:03:17,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:03:17,764 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:03:17,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:03:17,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:03:17,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:03:17,765 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:03:17,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:03:17,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:03:17,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:03:17,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:03:17,767 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:03:17,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:03:17,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:03:17,767 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:03:17,799 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:03:17,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:03:17,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:03:17,817 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:03:17,818 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:03:17,819 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label12.c [2019-10-02 20:03:17,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e7bdec77/d023c645c8c0447c924d70d2a34eb829/FLAG75041851d [2019-10-02 20:03:18,568 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:03:18,569 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label12.c [2019-10-02 20:03:18,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e7bdec77/d023c645c8c0447c924d70d2a34eb829/FLAG75041851d [2019-10-02 20:03:18,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e7bdec77/d023c645c8c0447c924d70d2a34eb829 [2019-10-02 20:03:18,658 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:03:18,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:03:18,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:03:18,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:03:18,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:03:18,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:03:18" (1/1) ... [2019-10-02 20:03:18,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb11ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:18, skipping insertion in model container [2019-10-02 20:03:18,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:03:18" (1/1) ... [2019-10-02 20:03:18,680 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:03:18,840 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:03:20,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:03:20,197 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:03:20,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:03:20,821 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:03:20,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:20 WrapperNode [2019-10-02 20:03:20,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:03:20,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:03:20,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:03:20,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:03:20,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:20" (1/1) ... [2019-10-02 20:03:20,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:20" (1/1) ... [2019-10-02 20:03:20,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:20" (1/1) ... [2019-10-02 20:03:20,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:20" (1/1) ... [2019-10-02 20:03:21,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:20" (1/1) ... [2019-10-02 20:03:21,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:20" (1/1) ... [2019-10-02 20:03:21,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:20" (1/1) ... [2019-10-02 20:03:21,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:03:21,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:03:21,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:03:21,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:03:21,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:20" (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 20:03:21,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:03:21,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:03:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:03:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 20:03:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-02 20:03:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-02 20:03:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:03:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:03:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 20:03:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-02 20:03:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-02 20:03:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:03:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:03:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:03:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:03:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:03:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:03:26,470 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:03:26,471 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:03:26,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:03:26 BoogieIcfgContainer [2019-10-02 20:03:26,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:03:26,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:03:26,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:03:26,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:03:26,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:03:18" (1/3) ... [2019-10-02 20:03:26,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300232ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:03:26, skipping insertion in model container [2019-10-02 20:03:26,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:20" (2/3) ... [2019-10-02 20:03:26,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300232ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:03:26, skipping insertion in model container [2019-10-02 20:03:26,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:03:26" (3/3) ... [2019-10-02 20:03:26,488 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label12.c [2019-10-02 20:03:26,503 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:03:26,521 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:03:26,540 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:03:26,578 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:03:26,578 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:03:26,579 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:03:26,579 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:03:26,579 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:03:26,580 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:03:26,580 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:03:26,580 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:03:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-02 20:03:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-02 20:03:26,643 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:03:26,645 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] [2019-10-02 20:03:26,648 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:03:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:03:26,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1107355747, now seen corresponding path program 1 times [2019-10-02 20:03:26,656 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:03:26,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:26,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:03:26,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:26,719 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:03:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:03:27,089 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 20:03:27,091 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:03:27,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 20:03:27,092 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:03:27,097 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 20:03:27,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 20:03:27,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 20:03:27,115 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-10-02 20:03:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:03:33,090 INFO L93 Difference]: Finished difference Result 1610 states and 2855 transitions. [2019-10-02 20:03:33,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 20:03:33,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-10-02 20:03:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:03:33,135 INFO L225 Difference]: With dead ends: 1610 [2019-10-02 20:03:33,135 INFO L226 Difference]: Without dead ends: 1542 [2019-10-02 20:03:33,137 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 20:03:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-02 20:03:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-10-02 20:03:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-10-02 20:03:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2750 transitions. [2019-10-02 20:03:33,273 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2750 transitions. Word has length 64 [2019-10-02 20:03:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:03:33,274 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2750 transitions. [2019-10-02 20:03:33,274 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 20:03:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2750 transitions. [2019-10-02 20:03:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-02 20:03:33,283 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:03:33,283 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, 1, 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 20:03:33,284 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:03:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:03:33,284 INFO L82 PathProgramCache]: Analyzing trace with hash -493202935, now seen corresponding path program 1 times [2019-10-02 20:03:33,284 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:03:33,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:33,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:03:33,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:33,287 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:03:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:03:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:03:33,592 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:03:33,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:03:33,592 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:03:33,594 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:03:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:03:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:03:33,596 INFO L87 Difference]: Start difference. First operand 1542 states and 2750 transitions. Second operand 5 states. [2019-10-02 20:03:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:03:41,685 INFO L93 Difference]: Finished difference Result 3154 states and 5401 transitions. [2019-10-02 20:03:41,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:03:41,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2019-10-02 20:03:41,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:03:41,706 INFO L225 Difference]: With dead ends: 3154 [2019-10-02 20:03:41,706 INFO L226 Difference]: Without dead ends: 3154 [2019-10-02 20:03:41,708 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 20:03:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2019-10-02 20:03:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 3122. [2019-10-02 20:03:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3122 states. [2019-10-02 20:03:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 5336 transitions. [2019-10-02 20:03:41,799 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 5336 transitions. Word has length 137 [2019-10-02 20:03:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:03:41,801 INFO L475 AbstractCegarLoop]: Abstraction has 3122 states and 5336 transitions. [2019-10-02 20:03:41,802 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:03:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 5336 transitions. [2019-10-02 20:03:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-02 20:03:41,813 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:03:41,813 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, 1, 1, 1, 1, 1, 1, 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 20:03:41,814 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:03:41,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:03:41,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1291094684, now seen corresponding path program 1 times [2019-10-02 20:03:41,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:03:41,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:41,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:03:41,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:41,821 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:03:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:03:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:03:42,013 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:03:42,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:03:42,013 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:03:42,014 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:03:42,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:03:42,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:03:42,015 INFO L87 Difference]: Start difference. First operand 3122 states and 5336 transitions. Second operand 6 states. [2019-10-02 20:03:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:03:50,985 INFO L93 Difference]: Finished difference Result 6375 states and 10897 transitions. [2019-10-02 20:03:50,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:03:50,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-10-02 20:03:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:03:51,023 INFO L225 Difference]: With dead ends: 6375 [2019-10-02 20:03:51,024 INFO L226 Difference]: Without dead ends: 6375 [2019-10-02 20:03:51,033 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 20:03:51,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2019-10-02 20:03:51,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6333. [2019-10-02 20:03:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6333 states. [2019-10-02 20:03:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6333 states to 6333 states and 10771 transitions. [2019-10-02 20:03:51,214 INFO L78 Accepts]: Start accepts. Automaton has 6333 states and 10771 transitions. Word has length 142 [2019-10-02 20:03:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:03:51,216 INFO L475 AbstractCegarLoop]: Abstraction has 6333 states and 10771 transitions. [2019-10-02 20:03:51,216 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:03:51,216 INFO L276 IsEmpty]: Start isEmpty. Operand 6333 states and 10771 transitions. [2019-10-02 20:03:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-02 20:03:51,219 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:03:51,219 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:51,220 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:03:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:03:51,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1777138644, now seen corresponding path program 1 times [2019-10-02 20:03:51,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:03:51,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:51,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:03:51,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:51,223 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:03:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:03:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:03:51,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:03:51,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:03:51,470 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:03:51,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:03:51,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:03:51,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:03:51,472 INFO L87 Difference]: Start difference. First operand 6333 states and 10771 transitions. Second operand 6 states. [2019-10-02 20:03:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:03:58,860 INFO L93 Difference]: Finished difference Result 9653 states and 15963 transitions. [2019-10-02 20:03:58,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:03:58,861 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-10-02 20:03:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:03:58,913 INFO L225 Difference]: With dead ends: 9653 [2019-10-02 20:03:58,913 INFO L226 Difference]: Without dead ends: 9653 [2019-10-02 20:03:58,914 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 20:03:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9653 states. [2019-10-02 20:03:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9653 to 9576. [2019-10-02 20:03:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9576 states. [2019-10-02 20:03:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 15604 transitions. [2019-10-02 20:03:59,185 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 15604 transitions. Word has length 150 [2019-10-02 20:03:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:03:59,186 INFO L475 AbstractCegarLoop]: Abstraction has 9576 states and 15604 transitions. [2019-10-02 20:03:59,186 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:03:59,187 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 15604 transitions. [2019-10-02 20:03:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-02 20:03:59,190 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:03:59,190 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:59,191 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:03:59,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:03:59,192 INFO L82 PathProgramCache]: Analyzing trace with hash -124269619, now seen corresponding path program 1 times [2019-10-02 20:03:59,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:03:59,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:59,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:03:59,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:59,194 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:03:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:03:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:03:59,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:03:59,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:03:59,428 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:03:59,429 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:03:59,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:03:59,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:03:59,430 INFO L87 Difference]: Start difference. First operand 9576 states and 15604 transitions. Second operand 6 states. [2019-10-02 20:04:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:04:07,159 INFO L93 Difference]: Finished difference Result 14630 states and 22313 transitions. [2019-10-02 20:04:07,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:04:07,160 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2019-10-02 20:04:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:04:07,227 INFO L225 Difference]: With dead ends: 14630 [2019-10-02 20:04:07,227 INFO L226 Difference]: Without dead ends: 14630 [2019-10-02 20:04:07,227 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 20:04:07,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14630 states. [2019-10-02 20:04:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14630 to 14577. [2019-10-02 20:04:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14577 states. [2019-10-02 20:04:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14577 states to 14577 states and 21948 transitions. [2019-10-02 20:04:07,527 INFO L78 Accepts]: Start accepts. Automaton has 14577 states and 21948 transitions. Word has length 183 [2019-10-02 20:04:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:04:07,527 INFO L475 AbstractCegarLoop]: Abstraction has 14577 states and 21948 transitions. [2019-10-02 20:04:07,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:04:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 14577 states and 21948 transitions. [2019-10-02 20:04:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-10-02 20:04:07,536 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:04:07,537 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, 3, 3, 3, 3, 3, 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 20:04:07,537 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:04:07,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:04:07,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1910943348, now seen corresponding path program 1 times [2019-10-02 20:04:07,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:04:07,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:07,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:04:07,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:07,543 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:04:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:04:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 117 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-02 20:04:08,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:04:08,474 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:04:08,475 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2019-10-02 20:04:08,478 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2211], [2219], [2227], [2235], [2243], [2251], [2259], [2267], [2275], [2283], [2287], [2289], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2384], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2460], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-10-02 20:04:08,548 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:04:08,549 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:04:30,375 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:04:30,378 INFO L272 AbstractInterpreter]: Visited 102 different actions 199 times. Merged at 4 different actions 5 times. Never widened. Performed 443 root evaluator evaluations with a maximum evaluation depth of 16. Performed 443 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-10-02 20:04:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:04:30,383 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:04:40,965 INFO L227 lantSequenceWeakener]: Weakened 230 states. On average, predicates are now at 75.77% of their original sizes. [2019-10-02 20:04:40,965 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:04:41,066 INFO L420 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2019-10-02 20:04:41,066 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:04:41,067 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:04:41,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-10-02 20:04:41,068 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:04:41,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 20:04:41,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 20:04:41,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-02 20:04:41,069 INFO L87 Difference]: Start difference. First operand 14577 states and 21948 transitions. Second operand 12 states. [2019-10-02 20:05:36,789 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.