java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:24:16,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:24:16,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:24:16,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 21:24:16,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 21:24:16,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 21:24:16,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 21:24:16,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 21:24:16,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 21:24:16,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 21:24:16,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 21:24:16,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 21:24:16,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 21:24:16,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 21:24:16,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 21:24:16,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 21:24:16,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 21:24:16,659 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 21:24:16,674 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:24:16,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:24:16,675 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:24:16,675 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:24:16,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:24:16,676 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:24:16,676 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:24:16,677 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:24:16,677 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:24:16,677 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:24:16,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:24:16,678 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:24:16,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:24:16,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:24:16,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:24:16,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:24:16,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:24:16,679 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:24:16,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:24:16,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:24:16,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:24:16,680 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:24:16,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:24:16,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:24:16,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:24:16,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:24:16,681 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:24:16,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:24:16,681 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:24:16,682 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:24:16,718 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:24:16,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:24:16,733 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:24:16,734 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:24:16,734 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:24:16,735 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-10-02 21:24:16,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22b0da659/49cf9fc54602470fbe22217da5a99ed7/FLAG27b779c08 [2019-10-02 21:24:17,371 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:24:17,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-10-02 21:24:17,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22b0da659/49cf9fc54602470fbe22217da5a99ed7/FLAG27b779c08 [2019-10-02 21:24:17,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22b0da659/49cf9fc54602470fbe22217da5a99ed7 [2019-10-02 21:24:17,621 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:24:17,622 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:24:17,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:24:17,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:24:17,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:24:17,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:24:17" (1/1) ... [2019-10-02 21:24:17,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:24:17, skipping insertion in model container [2019-10-02 21:24:17,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:24:17" (1/1) ... [2019-10-02 21:24:17,639 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:24:17,724 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:24:18,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:24:18,557 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:24:18,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:24:18,883 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:24:18,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:24:18 WrapperNode [2019-10-02 21:24:18,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:24:18,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:24:18,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:24:18,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:24:18,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:24:18" (1/1) ... [2019-10-02 21:24:18,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:24:18" (1/1) ... [2019-10-02 21:24:18,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:24:18" (1/1) ... [2019-10-02 21:24:18,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:24:18" (1/1) ... [2019-10-02 21:24:19,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:24:18" (1/1) ... [2019-10-02 21:24:19,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:24:18" (1/1) ... [2019-10-02 21:24:19,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:24:18" (1/1) ... [2019-10-02 21:24:19,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:24:19,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:24:19,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:24:19,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:24:19,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:24:18" (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 21:24:19,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:24:19,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:24:19,138 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:24:19,138 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:24:19,138 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:24:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:24:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:24:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:24:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:24:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:24:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:24:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:24:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:24:21,549 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:24:21,550 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:24:21,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:24:21 BoogieIcfgContainer [2019-10-02 21:24:21,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:24:21,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:24:21,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:24:21,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:24:21,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:24:17" (1/3) ... [2019-10-02 21:24:21,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d224d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:24:21, skipping insertion in model container [2019-10-02 21:24:21,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:24:18" (2/3) ... [2019-10-02 21:24:21,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d224d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:24:21, skipping insertion in model container [2019-10-02 21:24:21,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:24:21" (3/3) ... [2019-10-02 21:24:21,563 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label17.c [2019-10-02 21:24:21,576 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:24:21,588 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:24:21,610 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:24:21,646 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:24:21,646 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:24:21,646 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:24:21,646 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:24:21,646 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:24:21,647 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:24:21,647 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:24:21,647 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:24:21,687 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-02 21:24:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-02 21:24:21,703 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:24:21,704 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:24:21,706 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:24:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:24:21,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1802126811, now seen corresponding path program 1 times [2019-10-02 21:24:21,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:24:21,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:21,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:24:21,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:21,775 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:24:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:24:22,157 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 21:24:22,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:24:22,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 21:24:22,160 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:24:22,167 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 21:24:22,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 21:24:22,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 21:24:22,185 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-02 21:24:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:24:24,904 INFO L93 Difference]: Finished difference Result 750 states and 1301 transitions. [2019-10-02 21:24:24,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 21:24:24,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-10-02 21:24:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:24:24,928 INFO L225 Difference]: With dead ends: 750 [2019-10-02 21:24:24,929 INFO L226 Difference]: Without dead ends: 682 [2019-10-02 21:24:24,930 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 21:24:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-02 21:24:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-02 21:24:25,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-02 21:24:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-10-02 21:24:25,043 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 64 [2019-10-02 21:24:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:24:25,043 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-10-02 21:24:25,044 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 21:24:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-10-02 21:24:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-02 21:24:25,050 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:24:25,051 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:24:25,051 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:24:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:24:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2014427524, now seen corresponding path program 1 times [2019-10-02 21:24:25,052 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:24:25,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:25,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:24:25,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:25,054 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:24:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:24:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:24:25,262 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:24:25,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:24:25,263 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:24:25,265 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:24:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:24:25,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:24:25,266 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 6 states. [2019-10-02 21:24:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:24:28,104 INFO L93 Difference]: Finished difference Result 1387 states and 2310 transitions. [2019-10-02 21:24:28,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:24:28,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-10-02 21:24:28,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:24:28,117 INFO L225 Difference]: With dead ends: 1387 [2019-10-02 21:24:28,117 INFO L226 Difference]: Without dead ends: 1387 [2019-10-02 21:24:28,118 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 21:24:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2019-10-02 21:24:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1372. [2019-10-02 21:24:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-10-02 21:24:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2274 transitions. [2019-10-02 21:24:28,171 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2274 transitions. Word has length 134 [2019-10-02 21:24:28,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:24:28,172 INFO L475 AbstractCegarLoop]: Abstraction has 1372 states and 2274 transitions. [2019-10-02 21:24:28,172 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:24:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2274 transitions. [2019-10-02 21:24:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-02 21:24:28,176 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:24:28,176 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:24:28,177 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:24:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:24:28,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2143421116, now seen corresponding path program 1 times [2019-10-02 21:24:28,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:24:28,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:28,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:24:28,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:28,179 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:24:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:24:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:24:28,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:24:28,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:24:28,349 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:24:28,352 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:24:28,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:24:28,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:24:28,353 INFO L87 Difference]: Start difference. First operand 1372 states and 2274 transitions. Second operand 6 states. [2019-10-02 21:24:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:24:31,294 INFO L93 Difference]: Finished difference Result 2100 states and 3398 transitions. [2019-10-02 21:24:31,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:24:31,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-10-02 21:24:31,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:24:31,308 INFO L225 Difference]: With dead ends: 2100 [2019-10-02 21:24:31,308 INFO L226 Difference]: Without dead ends: 2100 [2019-10-02 21:24:31,309 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 21:24:31,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-02 21:24:31,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2073. [2019-10-02 21:24:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2073 states. [2019-10-02 21:24:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3322 transitions. [2019-10-02 21:24:31,370 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3322 transitions. Word has length 138 [2019-10-02 21:24:31,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:24:31,371 INFO L475 AbstractCegarLoop]: Abstraction has 2073 states and 3322 transitions. [2019-10-02 21:24:31,371 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:24:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3322 transitions. [2019-10-02 21:24:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-02 21:24:31,375 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:24:31,375 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:24:31,375 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:24:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:24:31,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1919929679, now seen corresponding path program 1 times [2019-10-02 21:24:31,376 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:24:31,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:31,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:24:31,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:31,378 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:24:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:24:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:24:31,609 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:24:31,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:24:31,609 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:24:31,610 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:24:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:24:31,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:24:31,611 INFO L87 Difference]: Start difference. First operand 2073 states and 3322 transitions. Second operand 6 states. [2019-10-02 21:24:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:24:34,229 INFO L93 Difference]: Finished difference Result 3149 states and 4752 transitions. [2019-10-02 21:24:34,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:24:34,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2019-10-02 21:24:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:24:34,249 INFO L225 Difference]: With dead ends: 3149 [2019-10-02 21:24:34,249 INFO L226 Difference]: Without dead ends: 3149 [2019-10-02 21:24:34,250 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 21:24:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2019-10-02 21:24:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3128. [2019-10-02 21:24:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3128 states. [2019-10-02 21:24:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 4658 transitions. [2019-10-02 21:24:34,324 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 4658 transitions. Word has length 169 [2019-10-02 21:24:34,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:24:34,324 INFO L475 AbstractCegarLoop]: Abstraction has 3128 states and 4658 transitions. [2019-10-02 21:24:34,324 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:24:34,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 4658 transitions. [2019-10-02 21:24:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-02 21:24:34,328 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:24:34,328 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:34,329 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:24:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:24:34,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1854023577, now seen corresponding path program 1 times [2019-10-02 21:24:34,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:24:34,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:34,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:24:34,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:34,331 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:24:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:24:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:24:34,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:24:34,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:24:34,535 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:24:34,536 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:24:34,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:24:34,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:24:34,537 INFO L87 Difference]: Start difference. First operand 3128 states and 4658 transitions. Second operand 6 states. [2019-10-02 21:24:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:24:39,154 INFO L93 Difference]: Finished difference Result 6967 states and 10599 transitions. [2019-10-02 21:24:39,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:24:39,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 213 [2019-10-02 21:24:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:24:39,192 INFO L225 Difference]: With dead ends: 6967 [2019-10-02 21:24:39,193 INFO L226 Difference]: Without dead ends: 6967 [2019-10-02 21:24:39,193 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-02 21:24:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2019-10-02 21:24:39,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 6961. [2019-10-02 21:24:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6961 states. [2019-10-02 21:24:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 10570 transitions. [2019-10-02 21:24:39,405 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 10570 transitions. Word has length 213 [2019-10-02 21:24:39,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:24:39,406 INFO L475 AbstractCegarLoop]: Abstraction has 6961 states and 10570 transitions. [2019-10-02 21:24:39,406 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:24:39,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 10570 transitions. [2019-10-02 21:24:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-10-02 21:24:39,426 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:24:39,427 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:39,427 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:24:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:24:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash -37255589, now seen corresponding path program 1 times [2019-10-02 21:24:39,428 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:24:39,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:39,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:24:39,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:24:39,430 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:24:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:24:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 114 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 21:24:39,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:24:39,834 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:24:39,835 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 337 with the following transitions: [2019-10-02 21:24:39,838 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [587], [595], [599], [601], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [692], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1188], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-10-02 21:24:39,915 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:24:39,916 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:24:53,623 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:24:53,626 INFO L272 AbstractInterpreter]: Visited 203 different actions 203 times. Never merged. Never widened. Performed 380 root evaluator evaluations with a maximum evaluation depth of 14. Performed 380 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 21:24:53,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:24:53,630 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:25:06,663 INFO L227 lantSequenceWeakener]: Weakened 130 states. On average, predicates are now at 79.11% of their original sizes. [2019-10-02 21:25:06,663 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:25:06,905 INFO L420 sIntCurrentIteration]: We unified 335 AI predicates to 335 [2019-10-02 21:25:06,906 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:25:06,906 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:25:06,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2019-10-02 21:25:06,907 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:25:06,908 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-02 21:25:06,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-02 21:25:06,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-02 21:25:06,909 INFO L87 Difference]: Start difference. First operand 6961 states and 10570 transitions. Second operand 16 states. [2019-10-02 21:25:20,496 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.