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/Problem15_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:37:05,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:37:05,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:37:05,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:37:05,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 19:37:05,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 19:37:05,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 19:37:05,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 19:37:05,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 19:37:05,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 19:37:05,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 19:37:05,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 19:37:05,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 19:37:05,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 19:37:05,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 19:37:05,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 19:37:05,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 19:37:05,750 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 19:37:05,766 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:37:05,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:37:05,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:37:05,766 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:37:05,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:37:05,767 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:37:05,768 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:37:05,768 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:37:05,768 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:37:05,768 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:37:05,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:37:05,769 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:37:05,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:37:05,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:37:05,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:37:05,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:37:05,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:37:05,770 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:37:05,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:37:05,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:37:05,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:37:05,771 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:37:05,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:37:05,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:37:05,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:37:05,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:37:05,772 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:37:05,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:37:05,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:37:05,773 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:37:05,806 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:37:05,822 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:37:05,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:37:05,829 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:37:05,830 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:37:05,831 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label50.c [2019-09-09 19:37:05,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dd1d634b/9db4ba2b48034079b5b49a2d659cdacd/FLAGbd1362fb8 [2019-09-09 19:37:06,613 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:37:06,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label50.c [2019-09-09 19:37:06,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dd1d634b/9db4ba2b48034079b5b49a2d659cdacd/FLAGbd1362fb8 [2019-09-09 19:37:06,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dd1d634b/9db4ba2b48034079b5b49a2d659cdacd [2019-09-09 19:37:06,771 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:37:06,773 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:37:06,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:37:06,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:37:06,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:37:06,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:37:06" (1/1) ... [2019-09-09 19:37:06,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77661f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:37:06, skipping insertion in model container [2019-09-09 19:37:06,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:37:06" (1/1) ... [2019-09-09 19:37:06,799 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:37:06,894 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:37:07,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:37:07,733 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:37:08,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:37:08,052 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:37:08,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:37:08 WrapperNode [2019-09-09 19:37:08,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:37:08,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:37:08,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:37:08,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:37:08,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:37:08" (1/1) ... [2019-09-09 19:37:08,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:37:08" (1/1) ... [2019-09-09 19:37:08,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:37:08" (1/1) ... [2019-09-09 19:37:08,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:37:08" (1/1) ... [2019-09-09 19:37:08,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:37:08" (1/1) ... [2019-09-09 19:37:08,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:37:08" (1/1) ... [2019-09-09 19:37:08,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:37:08" (1/1) ... [2019-09-09 19:37:08,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:37:08,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:37:08,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:37:08,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:37:08,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:37:08" (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 19:37:08,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:37:08,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:37:08,344 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:37:08,344 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:37:08,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:37:08,344 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:37:08,345 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:37:08,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:37:08,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:37:08,345 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:37:08,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:37:08,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:37:08,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:37:11,683 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:37:11,684 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:37:11,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:37:11 BoogieIcfgContainer [2019-09-09 19:37:11,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:37:11,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:37:11,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:37:11,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:37:11,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:37:06" (1/3) ... [2019-09-09 19:37:11,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d56497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:37:11, skipping insertion in model container [2019-09-09 19:37:11,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:37:08" (2/3) ... [2019-09-09 19:37:11,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d56497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:37:11, skipping insertion in model container [2019-09-09 19:37:11,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:37:11" (3/3) ... [2019-09-09 19:37:11,694 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label50.c [2019-09-09 19:37:11,704 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:37:11,714 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:37:11,732 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:37:11,763 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:37:11,764 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:37:11,764 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:37:11,764 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:37:11,764 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:37:11,764 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:37:11,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:37:11,765 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:37:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:37:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-09 19:37:11,823 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:37:11,825 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:37:11,827 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:37:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:37:11,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1282983280, now seen corresponding path program 1 times [2019-09-09 19:37:11,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:37:11,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:37:11,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:37:11,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:37:11,899 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:37:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:37:12,173 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 19:37:12,176 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:37:12,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:37:12,176 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:37:12,182 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:37:12,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:37:12,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:37:12,201 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:37:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:37:17,917 INFO L93 Difference]: Finished difference Result 1066 states and 1447 transitions. [2019-09-09 19:37:17,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:37:17,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-09-09 19:37:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:37:17,949 INFO L225 Difference]: With dead ends: 1066 [2019-09-09 19:37:17,950 INFO L226 Difference]: Without dead ends: 993 [2019-09-09 19:37:17,951 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 19:37:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2019-09-09 19:37:18,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 682. [2019-09-09 19:37:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 19:37:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1002 transitions. [2019-09-09 19:37:18,059 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1002 transitions. Word has length 18 [2019-09-09 19:37:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:37:18,060 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1002 transitions. [2019-09-09 19:37:18,060 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:37:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1002 transitions. [2019-09-09 19:37:18,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-09 19:37:18,065 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:37:18,066 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:37:18,066 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:37:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:37:18,068 INFO L82 PathProgramCache]: Analyzing trace with hash -629755948, now seen corresponding path program 1 times [2019-09-09 19:37:18,068 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:37:18,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:37:18,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:37:18,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:37:18,070 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:37:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:37:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:37:18,293 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:37:18,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:37:18,294 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:37:18,299 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:37:18,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:37:18,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:37:18,300 INFO L87 Difference]: Start difference. First operand 682 states and 1002 transitions. Second operand 4 states. [2019-09-09 19:37:21,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:37:21,909 INFO L93 Difference]: Finished difference Result 1927 states and 2583 transitions. [2019-09-09 19:37:21,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:37:21,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-09-09 19:37:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:37:21,926 INFO L225 Difference]: With dead ends: 1927 [2019-09-09 19:37:21,927 INFO L226 Difference]: Without dead ends: 1927 [2019-09-09 19:37:21,928 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:37:21,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2019-09-09 19:37:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1923. [2019-09-09 19:37:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1923 states. [2019-09-09 19:37:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 2575 transitions. [2019-09-09 19:37:21,988 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 2575 transitions. Word has length 87 [2019-09-09 19:37:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:37:21,989 INFO L475 AbstractCegarLoop]: Abstraction has 1923 states and 2575 transitions. [2019-09-09 19:37:21,989 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:37:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 2575 transitions. [2019-09-09 19:37:21,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-09-09 19:37:22,000 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:37:22,000 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 19:37:22,000 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:37:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:37:22,001 INFO L82 PathProgramCache]: Analyzing trace with hash -435825076, now seen corresponding path program 1 times [2019-09-09 19:37:22,001 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:37:22,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:37:22,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:37:22,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:37:22,003 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:37:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:37:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 19:37:22,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:37:22,443 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:37:22,444 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 237 with the following transitions: [2019-09-09 19:37:22,447 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [125], [127], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [816], [821], [823], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:37:22,506 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:37:22,506 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:37:25,183 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:37:29,520 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:37:29,522 INFO L272 AbstractInterpreter]: Visited 129 different actions 253 times. Merged at 4 different actions 5 times. Never widened. Performed 531 root evaluator evaluations with a maximum evaluation depth of 14. Performed 531 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:37:29,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:37:29,527 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:37:31,251 INFO L227 lantSequenceWeakener]: Weakened 231 states. On average, predicates are now at 77.27% of their original sizes. [2019-09-09 19:37:31,251 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:37:31,410 INFO L420 sIntCurrentIteration]: We unified 235 AI predicates to 235 [2019-09-09 19:37:31,410 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:37:31,415 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:37:31,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 19:37:31,416 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:37:31,417 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 19:37:31,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 19:37:31,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 19:37:31,423 INFO L87 Difference]: Start difference. First operand 1923 states and 2575 transitions. Second operand 12 states.