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/Problem01_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 06:39:27,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 06:39:27,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 06:39:27,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 06:39:27,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 06:39:27,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 06:39:27,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 06:39:27,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 06:39:27,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 06:39:27,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 06:39:27,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 06:39:27,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 06:39:27,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 06:39:27,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 06:39:27,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 06:39:27,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 06:39:27,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 06:39:27,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 06:39:27,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 06:39:27,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 06:39:27,803 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 06:39:27,818 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 06:39:27,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 06:39:27,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 06:39:27,819 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 06:39:27,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 06:39:27,820 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 06:39:27,820 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 06:39:27,820 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 06:39:27,821 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 06:39:27,821 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 06:39:27,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 06:39:27,822 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 06:39:27,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 06:39:27,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 06:39:27,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 06:39:27,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 06:39:27,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 06:39:27,823 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 06:39:27,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 06:39:27,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 06:39:27,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 06:39:27,824 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 06:39:27,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 06:39:27,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 06:39:27,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 06:39:27,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 06:39:27,825 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 06:39:27,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 06:39:27,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 06:39:27,825 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 06:39:27,853 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 06:39:27,865 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 06:39:27,868 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 06:39:27,870 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 06:39:27,870 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 06:39:27,871 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label55.c [2019-09-09 06:39:27,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc0819e3c/c37ba10d109149b882d2457e286ebdb9/FLAG2565c3de8 [2019-09-09 06:39:28,465 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 06:39:28,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label55.c [2019-09-09 06:39:28,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc0819e3c/c37ba10d109149b882d2457e286ebdb9/FLAG2565c3de8 [2019-09-09 06:39:28,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc0819e3c/c37ba10d109149b882d2457e286ebdb9 [2019-09-09 06:39:28,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 06:39:28,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 06:39:28,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 06:39:28,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 06:39:28,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 06:39:28,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:39:28" (1/1) ... [2019-09-09 06:39:28,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24c983d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:28, skipping insertion in model container [2019-09-09 06:39:28,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:39:28" (1/1) ... [2019-09-09 06:39:28,784 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 06:39:28,849 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 06:39:29,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:39:29,541 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 06:39:29,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:39:29,692 INFO L192 MainTranslator]: Completed translation [2019-09-09 06:39:29,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:29 WrapperNode [2019-09-09 06:39:29,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 06:39:29,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 06:39:29,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 06:39:29,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 06:39:29,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:29" (1/1) ... [2019-09-09 06:39:29,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:29" (1/1) ... [2019-09-09 06:39:29,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:29" (1/1) ... [2019-09-09 06:39:29,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:29" (1/1) ... [2019-09-09 06:39:29,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:29" (1/1) ... [2019-09-09 06:39:29,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:29" (1/1) ... [2019-09-09 06:39:29,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:29" (1/1) ... [2019-09-09 06:39:29,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 06:39:29,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 06:39:29,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 06:39:29,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 06:39:29,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:29" (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 06:39:29,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 06:39:29,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 06:39:29,862 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 06:39:29,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 06:39:29,863 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 06:39:29,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 06:39:29,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 06:39:29,863 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 06:39:29,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 06:39:29,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 06:39:29,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 06:39:31,052 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 06:39:31,053 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 06:39:31,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:39:31 BoogieIcfgContainer [2019-09-09 06:39:31,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 06:39:31,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 06:39:31,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 06:39:31,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 06:39:31,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:39:28" (1/3) ... [2019-09-09 06:39:31,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5756efc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:39:31, skipping insertion in model container [2019-09-09 06:39:31,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:29" (2/3) ... [2019-09-09 06:39:31,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5756efc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:39:31, skipping insertion in model container [2019-09-09 06:39:31,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:39:31" (3/3) ... [2019-09-09 06:39:31,062 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label55.c [2019-09-09 06:39:31,071 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 06:39:31,079 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 06:39:31,096 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 06:39:31,126 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 06:39:31,127 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 06:39:31,127 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 06:39:31,128 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 06:39:31,128 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 06:39:31,128 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 06:39:31,128 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 06:39:31,129 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 06:39:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-09-09 06:39:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-09 06:39:31,165 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:39:31,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:39:31,168 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:39:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:39:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash -462333177, now seen corresponding path program 1 times [2019-09-09 06:39:31,176 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:39:31,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:39:31,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:39:31,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:39:31,221 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:39:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:39:31,598 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 06:39:31,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:39:31,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 06:39:31,601 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:39:31,611 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 06:39:31,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 06:39:31,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 06:39:31,630 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-09-09 06:39:32,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:39:32,571 INFO L93 Difference]: Finished difference Result 346 states and 515 transitions. [2019-09-09 06:39:32,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 06:39:32,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2019-09-09 06:39:32,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:39:32,601 INFO L225 Difference]: With dead ends: 346 [2019-09-09 06:39:32,602 INFO L226 Difference]: Without dead ends: 278 [2019-09-09 06:39:32,604 INFO L628 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 [2019-09-09 06:39:32,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-09-09 06:39:32,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-09-09 06:39:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-09-09 06:39:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2019-09-09 06:39:32,720 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 117 [2019-09-09 06:39:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:39:32,722 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2019-09-09 06:39:32,722 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 06:39:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2019-09-09 06:39:32,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-09 06:39:32,734 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:39:32,734 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 06:39:32,735 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:39:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:39:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1604702730, now seen corresponding path program 1 times [2019-09-09 06:39:32,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:39:32,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:39:32,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:39:32,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:39:32,739 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:39:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:39:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:39:32,911 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:39:32,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 06:39:32,911 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:39:32,913 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 06:39:32,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 06:39:32,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 06:39:32,914 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 5 states. [2019-09-09 06:39:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:39:33,784 INFO L93 Difference]: Finished difference Result 568 states and 809 transitions. [2019-09-09 06:39:33,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 06:39:33,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2019-09-09 06:39:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:39:33,790 INFO L225 Difference]: With dead ends: 568 [2019-09-09 06:39:33,791 INFO L226 Difference]: Without dead ends: 568 [2019-09-09 06:39:33,791 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 06:39:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-09-09 06:39:33,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2019-09-09 06:39:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-09-09 06:39:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 788 transitions. [2019-09-09 06:39:33,822 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 788 transitions. Word has length 126 [2019-09-09 06:39:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:39:33,822 INFO L475 AbstractCegarLoop]: Abstraction has 558 states and 788 transitions. [2019-09-09 06:39:33,822 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 06:39:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 788 transitions. [2019-09-09 06:39:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-09 06:39:33,825 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:39:33,826 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2019-09-09 06:39:33,826 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:39:33,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:39:33,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1555807011, now seen corresponding path program 1 times [2019-09-09 06:39:33,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:39:33,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:39:33,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:39:33,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:39:33,828 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:39:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:39:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:39:33,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 06:39:33,915 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 06:39:33,916 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 138 with the following transitions: [2019-09-09 06:39:33,918 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [10], [14], [17], [18], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [66], [70], [74], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [162], [166], [170], [174], [178], [182], [186], [190], [194], [198], [202], [206], [210], [214], [218], [222], [226], [230], [234], [238], [242], [246], [250], [254], [258], [262], [266], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [489], [497], [505], [513], [521], [529], [537], [545], [553], [561], [569], [577], [581], [583], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-09-09 06:39:33,969 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 06:39:33,970 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)