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/Problem10_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 18:50:35,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 18:50:35,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 18:50:35,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 18:50:35,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 18:50:35,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 18:50:35,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 18:50:35,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 18:50:35,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 18:50:35,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 18:50:35,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 18:50:35,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 18:50:35,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 18:50:35,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 18:50:35,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 18:50:35,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 18:50:35,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 18:50:35,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 18:50:35,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 18:50:35,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 18:50:35,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 18:50:35,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 18:50:35,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 18:50:35,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 18:50:36,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 18:50:36,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 18:50:36,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 18:50:36,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 18:50:36,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 18:50:36,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 18:50:36,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 18:50:36,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 18:50:36,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 18:50:36,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 18:50:36,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 18:50:36,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 18:50:36,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 18:50:36,032 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 18:50:36,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 18:50:36,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 18:50:36,033 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 18:50:36,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 18:50:36,034 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 18:50:36,034 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 18:50:36,034 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 18:50:36,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 18:50:36,035 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 18:50:36,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 18:50:36,035 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 18:50:36,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 18:50:36,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 18:50:36,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 18:50:36,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 18:50:36,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 18:50:36,037 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 18:50:36,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 18:50:36,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 18:50:36,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 18:50:36,037 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 18:50:36,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 18:50:36,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 18:50:36,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 18:50:36,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 18:50:36,038 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 18:50:36,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 18:50:36,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 18:50:36,039 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 18:50:36,080 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 18:50:36,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 18:50:36,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 18:50:36,097 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 18:50:36,098 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 18:50:36,099 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-10-02 18:50:36,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db47aa57b/95e8b570c52c4f6ca25dd7f5dcd6faf2/FLAG3bff3f04a [2019-10-02 18:50:36,757 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 18:50:36,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-10-02 18:50:36,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db47aa57b/95e8b570c52c4f6ca25dd7f5dcd6faf2/FLAG3bff3f04a [2019-10-02 18:50:37,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db47aa57b/95e8b570c52c4f6ca25dd7f5dcd6faf2 [2019-10-02 18:50:37,028 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 18:50:37,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 18:50:37,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 18:50:37,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 18:50:37,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 18:50:37,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:50:37" (1/1) ... [2019-10-02 18:50:37,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4198e4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:37, skipping insertion in model container [2019-10-02 18:50:37,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:50:37" (1/1) ... [2019-10-02 18:50:37,046 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 18:50:37,098 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 18:50:37,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:50:37,610 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 18:50:37,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:50:37,805 INFO L192 MainTranslator]: Completed translation [2019-10-02 18:50:37,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:37 WrapperNode [2019-10-02 18:50:37,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 18:50:37,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 18:50:37,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 18:50:37,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 18:50:37,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:37" (1/1) ... [2019-10-02 18:50:37,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:37" (1/1) ... [2019-10-02 18:50:37,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:37" (1/1) ... [2019-10-02 18:50:37,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:37" (1/1) ... [2019-10-02 18:50:37,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:37" (1/1) ... [2019-10-02 18:50:37,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:37" (1/1) ... [2019-10-02 18:50:37,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:37" (1/1) ... [2019-10-02 18:50:37,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 18:50:37,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 18:50:37,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 18:50:37,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 18:50:37,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 18:50:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 18:50:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 18:50:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 18:50:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 18:50:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 18:50:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 18:50:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 18:50:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 18:50:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 18:50:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 18:50:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 18:50:39,316 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 18:50:39,316 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 18:50:39,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:50:39 BoogieIcfgContainer [2019-10-02 18:50:39,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 18:50:39,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 18:50:39,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 18:50:39,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 18:50:39,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 06:50:37" (1/3) ... [2019-10-02 18:50:39,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acc1d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:50:39, skipping insertion in model container [2019-10-02 18:50:39,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:37" (2/3) ... [2019-10-02 18:50:39,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acc1d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:50:39, skipping insertion in model container [2019-10-02 18:50:39,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:50:39" (3/3) ... [2019-10-02 18:50:39,327 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label24.c [2019-10-02 18:50:39,337 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 18:50:39,349 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 18:50:39,367 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 18:50:39,406 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 18:50:39,407 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 18:50:39,407 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 18:50:39,407 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 18:50:39,408 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 18:50:39,408 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 18:50:39,408 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 18:50:39,409 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 18:50:39,430 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 18:50:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-02 18:50:39,440 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:39,441 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:50:39,444 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:39,450 INFO L82 PathProgramCache]: Analyzing trace with hash 894573055, now seen corresponding path program 1 times [2019-10-02 18:50:39,452 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:39,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:39,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:39,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:39,506 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:39,738 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:39,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 18:50:39,738 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:39,744 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 18:50:39,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 18:50:39,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:50:39,763 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-02 18:50:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:50:40,826 INFO L93 Difference]: Finished difference Result 362 states and 538 transitions. [2019-10-02 18:50:40,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 18:50:40,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-02 18:50:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:50:40,864 INFO L225 Difference]: With dead ends: 362 [2019-10-02 18:50:40,865 INFO L226 Difference]: Without dead ends: 294 [2019-10-02 18:50:40,870 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:50:40,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-02 18:50:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-02 18:50:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 18:50:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 421 transitions. [2019-10-02 18:50:40,956 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 421 transitions. Word has length 20 [2019-10-02 18:50:40,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:50:40,956 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 421 transitions. [2019-10-02 18:50:40,956 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 18:50:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 421 transitions. [2019-10-02 18:50:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-02 18:50:40,962 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:40,962 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 18:50:40,962 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:40,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:40,963 INFO L82 PathProgramCache]: Analyzing trace with hash 892965265, now seen corresponding path program 1 times [2019-10-02 18:50:40,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:40,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:40,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:40,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:40,965 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:41,252 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:41,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 18:50:41,253 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:41,256 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 18:50:41,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 18:50:41,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 18:50:41,258 INFO L87 Difference]: Start difference. First operand 294 states and 421 transitions. Second operand 6 states. [2019-10-02 18:50:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:50:42,203 INFO L93 Difference]: Finished difference Result 453 states and 620 transitions. [2019-10-02 18:50:42,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:50:42,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2019-10-02 18:50:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:50:42,208 INFO L225 Difference]: With dead ends: 453 [2019-10-02 18:50:42,208 INFO L226 Difference]: Without dead ends: 453 [2019-10-02 18:50:42,209 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 18:50:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-02 18:50:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-10-02 18:50:42,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-10-02 18:50:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 606 transitions. [2019-10-02 18:50:42,260 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 606 transitions. Word has length 89 [2019-10-02 18:50:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:50:42,261 INFO L475 AbstractCegarLoop]: Abstraction has 445 states and 606 transitions. [2019-10-02 18:50:42,261 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 18:50:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 606 transitions. [2019-10-02 18:50:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-02 18:50:42,265 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:42,265 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 18:50:42,265 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:42,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:42,266 INFO L82 PathProgramCache]: Analyzing trace with hash 712402589, now seen corresponding path program 1 times [2019-10-02 18:50:42,266 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:42,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:42,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:42,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:42,268 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:42,421 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:42,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 18:50:42,422 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:42,424 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 18:50:42,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 18:50:42,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 18:50:42,425 INFO L87 Difference]: Start difference. First operand 445 states and 606 transitions. Second operand 4 states. [2019-10-02 18:50:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:50:43,546 INFO L93 Difference]: Finished difference Result 1170 states and 1462 transitions. [2019-10-02 18:50:43,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 18:50:43,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-10-02 18:50:43,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:50:43,552 INFO L225 Difference]: With dead ends: 1170 [2019-10-02 18:50:43,552 INFO L226 Difference]: Without dead ends: 735 [2019-10-02 18:50:43,552 INFO L640 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 [2019-10-02 18:50:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-10-02 18:50:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 592. [2019-10-02 18:50:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-02 18:50:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 801 transitions. [2019-10-02 18:50:43,581 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 801 transitions. Word has length 99 [2019-10-02 18:50:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:50:43,583 INFO L475 AbstractCegarLoop]: Abstraction has 592 states and 801 transitions. [2019-10-02 18:50:43,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 18:50:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 801 transitions. [2019-10-02 18:50:43,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-02 18:50:43,590 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:43,590 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 18:50:43,591 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:43,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1290039418, now seen corresponding path program 1 times [2019-10-02 18:50:43,591 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:43,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:43,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:43,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:43,593 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:43,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:43,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 18:50:43,773 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:43,775 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 18:50:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 18:50:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 18:50:43,776 INFO L87 Difference]: Start difference. First operand 592 states and 801 transitions. Second operand 6 states. [2019-10-02 18:50:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:50:44,639 INFO L93 Difference]: Finished difference Result 906 states and 1181 transitions. [2019-10-02 18:50:44,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:50:44,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-10-02 18:50:44,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:50:44,647 INFO L225 Difference]: With dead ends: 906 [2019-10-02 18:50:44,647 INFO L226 Difference]: Without dead ends: 906 [2019-10-02 18:50:44,648 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 18:50:44,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-10-02 18:50:44,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 890. [2019-10-02 18:50:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-10-02 18:50:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1141 transitions. [2019-10-02 18:50:44,681 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1141 transitions. Word has length 142 [2019-10-02 18:50:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:50:44,682 INFO L475 AbstractCegarLoop]: Abstraction has 890 states and 1141 transitions. [2019-10-02 18:50:44,682 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 18:50:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1141 transitions. [2019-10-02 18:50:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-02 18:50:44,701 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:44,701 INFO L411 BasicCegarLoop]: trace histogram [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, 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] [2019-10-02 18:50:44,702 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:44,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1377962712, now seen corresponding path program 1 times [2019-10-02 18:50:44,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:44,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:44,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:44,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:44,708 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:45,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:50:45,039 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:50:45,041 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 190 with the following transitions: [2019-10-02 18:50:45,044 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [69], [71], [74], [82], [90], [98], [106], [114], [122], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [546], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:50:45,126 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:50:45,126 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:51:00,645 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:51:00,648 INFO L272 AbstractInterpreter]: Visited 92 different actions 92 times. Never merged. Never widened. Performed 129 root evaluator evaluations with a maximum evaluation depth of 16. Performed 129 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 18:51:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:51:00,653 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:51:21,591 INFO L227 lantSequenceWeakener]: Weakened 180 states. On average, predicates are now at 72.62% of their original sizes. [2019-10-02 18:51:21,591 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:51:21,641 INFO L420 sIntCurrentIteration]: We unified 188 AI predicates to 188 [2019-10-02 18:51:21,642 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:51:21,642 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:51:21,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-10-02 18:51:21,643 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:51:21,643 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 18:51:21,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 18:51:21,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 18:51:21,644 INFO L87 Difference]: Start difference. First operand 890 states and 1141 transitions. Second operand 7 states. [2019-10-02 18:51:26,161 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:54:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:54:00,451 INFO L93 Difference]: Finished difference Result 1034 states and 1291 transitions. [2019-10-02 18:54:00,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:54:00,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 189 [2019-10-02 18:54:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:54:00,457 INFO L225 Difference]: With dead ends: 1034 [2019-10-02 18:54:00,457 INFO L226 Difference]: Without dead ends: 1034 [2019-10-02 18:54:00,457 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-02 18:54:00,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2019-10-02 18:54:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1033. [2019-10-02 18:54:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2019-10-02 18:54:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1290 transitions. [2019-10-02 18:54:00,483 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1290 transitions. Word has length 189 [2019-10-02 18:54:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:54:00,484 INFO L475 AbstractCegarLoop]: Abstraction has 1033 states and 1290 transitions. [2019-10-02 18:54:00,484 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 18:54:00,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1290 transitions. [2019-10-02 18:54:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-02 18:54:00,488 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:54:00,489 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 18:54:00,489 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:54:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:54:00,490 INFO L82 PathProgramCache]: Analyzing trace with hash -608870379, now seen corresponding path program 1 times [2019-10-02 18:54:00,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:54:00,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:54:00,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:54:00,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:54:00,492 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:54:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:54:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 111 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-02 18:54:01,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:54:01,457 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:54:01,457 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 260 with the following transitions: [2019-10-02 18:54:01,457 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [69], [71], [74], [82], [90], [98], [106], [114], [122], [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], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [546], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:54:01,478 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:54:01,478 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:54:04,102 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:54:42,553 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:54:42,556 INFO L272 AbstractInterpreter]: Visited 96 different actions 186 times. Merged at 4 different actions 4 times. Never widened. Performed 383 root evaluator evaluations with a maximum evaluation depth of 16. Performed 383 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 18:54:42,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:54:42,557 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:55:25,914 INFO L227 lantSequenceWeakener]: Weakened 256 states. On average, predicates are now at 72.72% of their original sizes. [2019-10-02 18:55:25,914 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:55:26,002 INFO L420 sIntCurrentIteration]: We unified 258 AI predicates to 258 [2019-10-02 18:55:26,002 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:55:26,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:55:26,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2019-10-02 18:55:26,003 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:55:26,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 18:55:26,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 18:55:26,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 18:55:26,005 INFO L87 Difference]: Start difference. First operand 1033 states and 1290 transitions. Second operand 10 states. [2019-10-02 19:00:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:00:15,120 INFO L93 Difference]: Finished difference Result 1180 states and 1448 transitions. [2019-10-02 19:00:15,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 19:00:15,120 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 259 [2019-10-02 19:00:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:00:15,126 INFO L225 Difference]: With dead ends: 1180 [2019-10-02 19:00:15,126 INFO L226 Difference]: Without dead ends: 1180 [2019-10-02 19:00:15,126 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-02 19:00:15,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2019-10-02 19:00:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1178. [2019-10-02 19:00:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2019-10-02 19:00:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1446 transitions. [2019-10-02 19:00:15,155 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1446 transitions. Word has length 259 [2019-10-02 19:00:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:00:15,156 INFO L475 AbstractCegarLoop]: Abstraction has 1178 states and 1446 transitions. [2019-10-02 19:00:15,156 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 19:00:15,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1446 transitions. [2019-10-02 19:00:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-10-02 19:00:15,162 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:00:15,162 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 19:00:15,162 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:00:15,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:00:15,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1479931902, now seen corresponding path program 1 times [2019-10-02 19:00:15,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:00:15,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:00:15,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:00:15,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:00:15,165 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:00:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:00:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 125 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-02 19:00:15,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:00:15,824 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:00:15,824 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 305 with the following transitions: [2019-10-02 19:00:15,825 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [69], [71], [74], [82], [90], [98], [106], [114], [122], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [546], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:00:15,830 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:00:15,831 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:00:47,402 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:01:45,702 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:01:45,703 INFO L272 AbstractInterpreter]: Visited 124 different actions 242 times. Merged at 4 different actions 4 times. Never widened. Performed 467 root evaluator evaluations with a maximum evaluation depth of 16. Performed 467 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:01:45,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:01:45,703 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:03:07,767 INFO L227 lantSequenceWeakener]: Weakened 301 states. On average, predicates are now at 72.72% of their original sizes. [2019-10-02 19:03:07,767 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:03:07,888 INFO L420 sIntCurrentIteration]: We unified 303 AI predicates to 303 [2019-10-02 19:03:07,888 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:03:07,889 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:03:07,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2019-10-02 19:03:07,889 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:03:07,889 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 19:03:07,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 19:03:07,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-02 19:03:07,890 INFO L87 Difference]: Start difference. First operand 1178 states and 1446 transitions. Second operand 12 states.