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/Problem16_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:25:06,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:25:06,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:25:06,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 20:25:06,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 20:25:06,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 20:25:06,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 20:25:06,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 20:25:06,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 20:25:06,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 20:25:06,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 20:25:06,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 20:25:06,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 20:25:06,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 20:25:06,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 20:25:06,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 20:25:06,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 20:25:06,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 20:25:06,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 20:25:06,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 20:25:06,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 20:25:06,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 20:25:06,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 20:25:06,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 20:25:06,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 20:25:06,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 20:25:06,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 20:25:06,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 20:25:06,705 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 [2019-09-09 20:25:06,722 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:25:06,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:25:06,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:25:06,723 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:25:06,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:25:06,723 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:25:06,724 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:25:06,724 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:25:06,724 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:25:06,724 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:25:06,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:25:06,725 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:25:06,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:25:06,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:25:06,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:25:06,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:25:06,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:25:06,726 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:25:06,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:25:06,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:25:06,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:25:06,727 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:25:06,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:25:06,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:25:06,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:25:06,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:25:06,728 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:25:06,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:25:06,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:25:06,729 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:25:06,762 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:25:06,774 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:25:06,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:25:06,779 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:25:06,779 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:25:06,780 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label37.c [2019-09-09 20:25:06,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14a3c9fb0/a7aa3c49d3af4a028702247de9e56558/FLAG429291de4 [2019-09-09 20:25:07,449 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:25:07,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label37.c [2019-09-09 20:25:07,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14a3c9fb0/a7aa3c49d3af4a028702247de9e56558/FLAG429291de4 [2019-09-09 20:25:07,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14a3c9fb0/a7aa3c49d3af4a028702247de9e56558 [2019-09-09 20:25:07,717 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:25:07,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:25:07,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:25:07,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:25:07,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:25:07,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:25:07" (1/1) ... [2019-09-09 20:25:07,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335c662c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:07, skipping insertion in model container [2019-09-09 20:25:07,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:25:07" (1/1) ... [2019-09-09 20:25:07,735 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:25:07,802 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:25:08,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:25:08,583 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:25:08,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:25:08,870 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:25:08,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:08 WrapperNode [2019-09-09 20:25:08,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:25:08,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:25:08,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:25:08,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:25:08,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:08" (1/1) ... [2019-09-09 20:25:08,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:08" (1/1) ... [2019-09-09 20:25:08,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:08" (1/1) ... [2019-09-09 20:25:08,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:08" (1/1) ... [2019-09-09 20:25:09,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:08" (1/1) ... [2019-09-09 20:25:09,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:08" (1/1) ... [2019-09-09 20:25:09,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:08" (1/1) ... [2019-09-09 20:25:09,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:25:09,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:25:09,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:25:09,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:25:09,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:25:09,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:25:09,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:25:09,171 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:25:09,171 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:25:09,171 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:25:09,171 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:25:09,172 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:25:09,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:25:09,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:25:09,172 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:25:09,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:25:09,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:25:09,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:25:11,666 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:25:11,669 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:25:11,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:25:11 BoogieIcfgContainer [2019-09-09 20:25:11,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:25:11,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:25:11,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:25:11,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:25:11,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:25:07" (1/3) ... [2019-09-09 20:25:11,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c88d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:25:11, skipping insertion in model container [2019-09-09 20:25:11,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:08" (2/3) ... [2019-09-09 20:25:11,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c88d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:25:11, skipping insertion in model container [2019-09-09 20:25:11,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:25:11" (3/3) ... [2019-09-09 20:25:11,688 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label37.c [2019-09-09 20:25:11,698 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:25:11,711 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:25:11,729 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:25:11,764 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:25:11,764 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:25:11,764 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:25:11,765 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:25:11,765 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:25:11,765 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:25:11,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:25:11,765 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:25:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 20:25:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-09 20:25:11,811 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:25:11,812 INFO L399 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] [2019-09-09 20:25:11,814 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:25:11,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1021054035, now seen corresponding path program 1 times [2019-09-09 20:25:11,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:25:11,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:11,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:25:11,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:11,875 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:25:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:25:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:25:12,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:25:12,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 20:25:12,147 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:25:12,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 20:25:12,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 20:25:12,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:25:12,171 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-09-09 20:25:15,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:25:15,840 INFO L93 Difference]: Finished difference Result 1106 states and 1825 transitions. [2019-09-09 20:25:15,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 20:25:15,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-09-09 20:25:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:25:15,872 INFO L225 Difference]: With dead ends: 1106 [2019-09-09 20:25:15,873 INFO L226 Difference]: Without dead ends: 1019 [2019-09-09 20:25:15,874 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:25:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-09-09 20:25:15,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 682. [2019-09-09 20:25:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 20:25:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1148 transitions. [2019-09-09 20:25:15,972 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1148 transitions. Word has length 26 [2019-09-09 20:25:15,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:25:15,972 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1148 transitions. [2019-09-09 20:25:15,973 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 20:25:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1148 transitions. [2019-09-09 20:25:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-09 20:25:15,977 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:25:15,978 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 20:25:15,978 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:25:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash -100109140, now seen corresponding path program 1 times [2019-09-09 20:25:15,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:25:15,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:15,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:25:15,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:15,980 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:25:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:25:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:25:16,179 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:25:16,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:25:16,179 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:25:16,181 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:25:16,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:25:16,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:25:16,182 INFO L87 Difference]: Start difference. First operand 682 states and 1148 transitions. Second operand 6 states. [2019-09-09 20:25:19,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:25:19,041 INFO L93 Difference]: Finished difference Result 1392 states and 2259 transitions. [2019-09-09 20:25:19,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:25:19,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-09-09 20:25:19,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:25:19,055 INFO L225 Difference]: With dead ends: 1392 [2019-09-09 20:25:19,055 INFO L226 Difference]: Without dead ends: 1392 [2019-09-09 20:25:19,056 INFO L628 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 [2019-09-09 20:25:19,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2019-09-09 20:25:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1374. [2019-09-09 20:25:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2019-09-09 20:25:19,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2217 transitions. [2019-09-09 20:25:19,115 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2217 transitions. Word has length 96 [2019-09-09 20:25:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:25:19,116 INFO L475 AbstractCegarLoop]: Abstraction has 1374 states and 2217 transitions. [2019-09-09 20:25:19,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:25:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2217 transitions. [2019-09-09 20:25:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-09 20:25:19,120 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:25:19,120 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 20:25:19,120 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:25:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:19,121 INFO L82 PathProgramCache]: Analyzing trace with hash -906707907, now seen corresponding path program 1 times [2019-09-09 20:25:19,121 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:25:19,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:19,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:25:19,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:19,123 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:25:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:25:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:25:19,287 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:25:19,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 20:25:19,287 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:25:19,288 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 20:25:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 20:25:19,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 20:25:19,289 INFO L87 Difference]: Start difference. First operand 1374 states and 2217 transitions. Second operand 5 states. [2019-09-09 20:25:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:25:21,797 INFO L93 Difference]: Finished difference Result 2095 states and 2832 transitions. [2019-09-09 20:25:21,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:25:21,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2019-09-09 20:25:21,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:25:21,821 INFO L225 Difference]: With dead ends: 2095 [2019-09-09 20:25:21,822 INFO L226 Difference]: Without dead ends: 2095 [2019-09-09 20:25:21,823 INFO L628 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 [2019-09-09 20:25:21,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2019-09-09 20:25:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2079. [2019-09-09 20:25:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2079 states. [2019-09-09 20:25:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 2787 transitions. [2019-09-09 20:25:21,912 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 2787 transitions. Word has length 97 [2019-09-09 20:25:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:25:21,913 INFO L475 AbstractCegarLoop]: Abstraction has 2079 states and 2787 transitions. [2019-09-09 20:25:21,913 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 20:25:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 2787 transitions. [2019-09-09 20:25:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-09 20:25:21,921 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:25:21,921 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-09-09 20:25:21,921 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:25:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:21,922 INFO L82 PathProgramCache]: Analyzing trace with hash -38259771, now seen corresponding path program 1 times [2019-09-09 20:25:21,922 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:25:21,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:21,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:25:21,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:21,923 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:25:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:25:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:25:22,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:25:22,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:25:22,186 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:25:22,186 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:25:22,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:25:22,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:25:22,187 INFO L87 Difference]: Start difference. First operand 2079 states and 2787 transitions. Second operand 6 states. [2019-09-09 20:25:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:25:24,934 INFO L93 Difference]: Finished difference Result 4195 states and 5686 transitions. [2019-09-09 20:25:24,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:25:24,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 189 [2019-09-09 20:25:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:25:24,964 INFO L225 Difference]: With dead ends: 4195 [2019-09-09 20:25:24,964 INFO L226 Difference]: Without dead ends: 4195 [2019-09-09 20:25:24,965 INFO L628 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 [2019-09-09 20:25:24,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2019-09-09 20:25:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4157. [2019-09-09 20:25:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4157 states. [2019-09-09 20:25:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 5579 transitions. [2019-09-09 20:25:25,074 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 5579 transitions. Word has length 189 [2019-09-09 20:25:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:25:25,076 INFO L475 AbstractCegarLoop]: Abstraction has 4157 states and 5579 transitions. [2019-09-09 20:25:25,076 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:25:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 5579 transitions. [2019-09-09 20:25:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-09 20:25:25,080 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:25:25,080 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:25:25,080 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:25:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:25,081 INFO L82 PathProgramCache]: Analyzing trace with hash -142054307, now seen corresponding path program 1 times [2019-09-09 20:25:25,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:25:25,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:25,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:25:25,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:25,082 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:25:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:25:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:25:25,344 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:25:25,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:25:25,345 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:25:25,345 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:25:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:25:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:25:25,346 INFO L87 Difference]: Start difference. First operand 4157 states and 5579 transitions. Second operand 6 states. [2019-09-09 20:25:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:25:28,128 INFO L93 Difference]: Finished difference Result 5948 states and 7858 transitions. [2019-09-09 20:25:28,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:25:28,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 209 [2019-09-09 20:25:28,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:25:28,163 INFO L225 Difference]: With dead ends: 5948 [2019-09-09 20:25:28,164 INFO L226 Difference]: Without dead ends: 5948 [2019-09-09 20:25:28,164 INFO L628 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 [2019-09-09 20:25:28,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5948 states. [2019-09-09 20:25:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5948 to 5913. [2019-09-09 20:25:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5913 states. [2019-09-09 20:25:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5913 states to 5913 states and 7738 transitions. [2019-09-09 20:25:28,333 INFO L78 Accepts]: Start accepts. Automaton has 5913 states and 7738 transitions. Word has length 209 [2019-09-09 20:25:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:25:28,334 INFO L475 AbstractCegarLoop]: Abstraction has 5913 states and 7738 transitions. [2019-09-09 20:25:28,334 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:25:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5913 states and 7738 transitions. [2019-09-09 20:25:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-09-09 20:25:28,338 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:25:28,338 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:25:28,339 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:25:28,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:28,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1669661992, now seen corresponding path program 1 times [2019-09-09 20:25:28,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:25:28,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:28,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:25:28,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:28,343 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:25:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:25:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 86 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 20:25:28,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:25:28,569 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:25:28,570 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 226 with the following transitions: [2019-09-09 20:25:28,572 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [295], [297], [300], [308], [316], [324], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [676], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 20:25:28,620 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:25:28,621 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:25:36,776 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:25:36,778 INFO L272 AbstractInterpreter]: Visited 134 different actions 134 times. Never merged. Never widened. Performed 305 root evaluator evaluations with a maximum evaluation depth of 14. Performed 305 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 20:25:36,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:36,782 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:25:43,175 INFO L227 lantSequenceWeakener]: Weakened 206 states. On average, predicates are now at 77.59% of their original sizes. [2019-09-09 20:25:43,175 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:25:43,283 INFO L420 sIntCurrentIteration]: We unified 224 AI predicates to 224 [2019-09-09 20:25:43,283 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:25:43,284 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:25:43,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 15 [2019-09-09 20:25:43,284 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:25:43,285 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 20:25:43,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 20:25:43,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-09-09 20:25:43,286 INFO L87 Difference]: Start difference. First operand 5913 states and 7738 transitions. Second operand 12 states. [2019-09-09 20:26:07,228 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.