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/Problem18_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 22:10:01,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 22:10:01,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 22:10:01,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 22:10:01,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 22:10:01,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 22:10:01,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 22:10:01,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 22:10:01,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 22:10:01,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 22:10:01,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 22:10:01,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 22:10:01,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 22:10:01,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 22:10:01,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 22:10:01,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 22:10:01,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 22:10:01,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 22:10:01,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 22:10:01,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 22:10:01,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 22:10:01,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 22:10:01,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 22:10:01,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 22:10:01,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 22:10:01,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 22:10:01,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 22:10:01,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 22:10:01,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 22:10:01,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 22:10:01,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 22:10:01,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 22:10:01,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 22:10:01,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 22:10:01,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 22:10:01,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 22:10:01,871 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 22:10:01,889 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 22:10:01,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 22:10:01,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 22:10:01,891 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 22:10:01,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 22:10:01,892 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 22:10:01,892 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 22:10:01,893 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 22:10:01,893 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 22:10:01,893 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 22:10:01,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 22:10:01,894 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 22:10:01,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 22:10:01,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 22:10:01,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 22:10:01,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 22:10:01,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 22:10:01,895 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 22:10:01,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 22:10:01,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 22:10:01,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 22:10:01,896 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 22:10:01,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 22:10:01,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 22:10:01,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 22:10:01,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 22:10:01,897 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 22:10:01,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 22:10:01,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 22:10:01,897 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 22:10:01,925 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 22:10:01,938 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 22:10:01,941 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 22:10:01,942 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 22:10:01,943 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 22:10:01,943 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label44.c [2019-10-02 22:10:02,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1645cf9e/b4abe65f2edf4f69a30863c53db994e8/FLAGd9878c847 [2019-10-02 22:10:02,746 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 22:10:02,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label44.c [2019-10-02 22:10:02,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1645cf9e/b4abe65f2edf4f69a30863c53db994e8/FLAGd9878c847 [2019-10-02 22:10:02,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1645cf9e/b4abe65f2edf4f69a30863c53db994e8 [2019-10-02 22:10:02,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 22:10:02,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 22:10:02,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 22:10:02,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 22:10:02,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 22:10:02,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 10:10:02" (1/1) ... [2019-10-02 22:10:02,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a76cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:10:02, skipping insertion in model container [2019-10-02 22:10:02,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 10:10:02" (1/1) ... [2019-10-02 22:10:02,884 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 22:10:03,015 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 22:10:04,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 22:10:04,169 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 22:10:04,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 22:10:04,655 INFO L192 MainTranslator]: Completed translation [2019-10-02 22:10:04,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:10:04 WrapperNode [2019-10-02 22:10:04,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 22:10:04,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 22:10:04,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 22:10:04,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 22:10:04,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:10:04" (1/1) ... [2019-10-02 22:10:04,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:10:04" (1/1) ... [2019-10-02 22:10:04,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:10:04" (1/1) ... [2019-10-02 22:10:04,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:10:04" (1/1) ... [2019-10-02 22:10:04,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:10:04" (1/1) ... [2019-10-02 22:10:04,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:10:04" (1/1) ... [2019-10-02 22:10:04,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:10:04" (1/1) ... [2019-10-02 22:10:04,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 22:10:04,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 22:10:04,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 22:10:04,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 22:10:04,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:10:04" (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 22:10:05,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 22:10:05,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 22:10:05,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 22:10:05,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 22:10:05,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-02 22:10:05,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 22:10:05,075 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 22:10:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 22:10:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-02 22:10:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 22:10:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 22:10:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 22:10:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 22:10:05,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 22:10:05,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 22:10:08,537 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 22:10:08,537 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 22:10:08,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 10:10:08 BoogieIcfgContainer [2019-10-02 22:10:08,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 22:10:08,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 22:10:08,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 22:10:08,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 22:10:08,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 10:10:02" (1/3) ... [2019-10-02 22:10:08,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363cfe5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 10:10:08, skipping insertion in model container [2019-10-02 22:10:08,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:10:04" (2/3) ... [2019-10-02 22:10:08,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363cfe5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 10:10:08, skipping insertion in model container [2019-10-02 22:10:08,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 10:10:08" (3/3) ... [2019-10-02 22:10:08,552 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label44.c [2019-10-02 22:10:08,564 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 22:10:08,574 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 22:10:08,591 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 22:10:08,624 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 22:10:08,624 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 22:10:08,624 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 22:10:08,624 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 22:10:08,625 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 22:10:08,625 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 22:10:08,625 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 22:10:08,625 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 22:10:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-02 22:10:08,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-02 22:10:08,675 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 22:10:08,676 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] [2019-10-02 22:10:08,678 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 22:10:08,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:10:08,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1139178023, now seen corresponding path program 1 times [2019-10-02 22:10:08,686 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 22:10:08,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:08,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 22:10:08,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:08,739 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 22:10:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 22:10:09,031 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 22:10:09,034 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 22:10:09,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 22:10:09,034 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 22:10:09,040 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 22:10:09,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 22:10:09,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 22:10:09,063 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-10-02 22:10:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 22:10:16,243 INFO L93 Difference]: Finished difference Result 2202 states and 3268 transitions. [2019-10-02 22:10:16,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 22:10:16,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-10-02 22:10:16,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 22:10:16,288 INFO L225 Difference]: With dead ends: 2202 [2019-10-02 22:10:16,288 INFO L226 Difference]: Without dead ends: 2114 [2019-10-02 22:10:16,290 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 22:10:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-10-02 22:10:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1412. [2019-10-02 22:10:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-02 22:10:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2246 transitions. [2019-10-02 22:10:16,421 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2246 transitions. Word has length 38 [2019-10-02 22:10:16,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 22:10:16,422 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2246 transitions. [2019-10-02 22:10:16,422 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 22:10:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2246 transitions. [2019-10-02 22:10:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-02 22:10:16,427 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 22:10:16,427 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:16,427 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 22:10:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:10:16,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1991333515, now seen corresponding path program 1 times [2019-10-02 22:10:16,428 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 22:10:16,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:16,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 22:10:16,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:16,430 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 22:10:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 22:10:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 22:10:16,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 22:10:16,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 22:10:16,578 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 22:10:16,583 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 22:10:16,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 22:10:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 22:10:16,584 INFO L87 Difference]: Start difference. First operand 1412 states and 2246 transitions. Second operand 5 states. [2019-10-02 22:10:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 22:10:22,716 INFO L93 Difference]: Finished difference Result 2888 states and 4349 transitions. [2019-10-02 22:10:22,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 22:10:22,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2019-10-02 22:10:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 22:10:22,734 INFO L225 Difference]: With dead ends: 2888 [2019-10-02 22:10:22,735 INFO L226 Difference]: Without dead ends: 2888 [2019-10-02 22:10:22,735 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 22:10:22,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-02 22:10:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2866. [2019-10-02 22:10:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2866 states. [2019-10-02 22:10:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 4300 transitions. [2019-10-02 22:10:22,812 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 4300 transitions. Word has length 107 [2019-10-02 22:10:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 22:10:22,813 INFO L475 AbstractCegarLoop]: Abstraction has 2866 states and 4300 transitions. [2019-10-02 22:10:22,813 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 22:10:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 4300 transitions. [2019-10-02 22:10:22,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-02 22:10:22,817 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 22:10:22,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:22,818 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 22:10:22,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:10:22,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1573098451, now seen corresponding path program 1 times [2019-10-02 22:10:22,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 22:10:22,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:22,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 22:10:22,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:22,820 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 22:10:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 22:10:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 22:10:22,944 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 22:10:22,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 22:10:22,945 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 22:10:22,947 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 22:10:22,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 22:10:22,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 22:10:22,948 INFO L87 Difference]: Start difference. First operand 2866 states and 4300 transitions. Second operand 6 states. [2019-10-02 22:10:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 22:10:29,317 INFO L93 Difference]: Finished difference Result 5892 states and 8817 transitions. [2019-10-02 22:10:29,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 22:10:29,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2019-10-02 22:10:29,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 22:10:29,362 INFO L225 Difference]: With dead ends: 5892 [2019-10-02 22:10:29,363 INFO L226 Difference]: Without dead ends: 5892 [2019-10-02 22:10:29,363 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 22:10:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2019-10-02 22:10:29,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5837. [2019-10-02 22:10:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5837 states. [2019-10-02 22:10:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5837 states to 5837 states and 8644 transitions. [2019-10-02 22:10:29,531 INFO L78 Accepts]: Start accepts. Automaton has 5837 states and 8644 transitions. Word has length 111 [2019-10-02 22:10:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 22:10:29,531 INFO L475 AbstractCegarLoop]: Abstraction has 5837 states and 8644 transitions. [2019-10-02 22:10:29,531 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 22:10:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5837 states and 8644 transitions. [2019-10-02 22:10:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-02 22:10:29,543 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 22:10:29,544 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:29,544 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 22:10:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:10:29,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1086561052, now seen corresponding path program 1 times [2019-10-02 22:10:29,545 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 22:10:29,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:29,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 22:10:29,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:29,548 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 22:10:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 22:10:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 22:10:29,774 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 22:10:29,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 22:10:29,774 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 22:10:29,774 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 22:10:29,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 22:10:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 22:10:29,775 INFO L87 Difference]: Start difference. First operand 5837 states and 8644 transitions. Second operand 6 states. [2019-10-02 22:10:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 22:10:35,838 INFO L93 Difference]: Finished difference Result 8852 states and 12859 transitions. [2019-10-02 22:10:35,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 22:10:35,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2019-10-02 22:10:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 22:10:35,877 INFO L225 Difference]: With dead ends: 8852 [2019-10-02 22:10:35,878 INFO L226 Difference]: Without dead ends: 8852 [2019-10-02 22:10:35,879 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 22:10:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2019-10-02 22:10:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 8798. [2019-10-02 22:10:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8798 states. [2019-10-02 22:10:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8798 states to 8798 states and 12610 transitions. [2019-10-02 22:10:36,065 INFO L78 Accepts]: Start accepts. Automaton has 8798 states and 12610 transitions. Word has length 132 [2019-10-02 22:10:36,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 22:10:36,066 INFO L475 AbstractCegarLoop]: Abstraction has 8798 states and 12610 transitions. [2019-10-02 22:10:36,067 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 22:10:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 8798 states and 12610 transitions. [2019-10-02 22:10:36,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-02 22:10:36,069 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 22:10:36,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:36,069 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 22:10:36,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:10:36,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565869, now seen corresponding path program 1 times [2019-10-02 22:10:36,070 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 22:10:36,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:36,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 22:10:36,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:36,071 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 22:10:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 22:10:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 22:10:36,325 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 22:10:36,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 22:10:36,325 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 22:10:36,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 22:10:36,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 22:10:36,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 22:10:36,327 INFO L87 Difference]: Start difference. First operand 8798 states and 12610 transitions. Second operand 6 states. [2019-10-02 22:10:41,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 22:10:41,682 INFO L93 Difference]: Finished difference Result 13145 states and 16778 transitions. [2019-10-02 22:10:41,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 22:10:41,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2019-10-02 22:10:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 22:10:41,724 INFO L225 Difference]: With dead ends: 13145 [2019-10-02 22:10:41,725 INFO L226 Difference]: Without dead ends: 13145 [2019-10-02 22:10:41,725 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 22:10:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2019-10-02 22:10:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 12393. [2019-10-02 22:10:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12393 states. [2019-10-02 22:10:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12393 states to 12393 states and 15748 transitions. [2019-10-02 22:10:41,944 INFO L78 Accepts]: Start accepts. Automaton has 12393 states and 15748 transitions. Word has length 175 [2019-10-02 22:10:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 22:10:41,944 INFO L475 AbstractCegarLoop]: Abstraction has 12393 states and 15748 transitions. [2019-10-02 22:10:41,944 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 22:10:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 12393 states and 15748 transitions. [2019-10-02 22:10:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-02 22:10:41,949 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 22:10:41,949 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 22:10:41,950 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 22:10:41,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:10:41,950 INFO L82 PathProgramCache]: Analyzing trace with hash 460105283, now seen corresponding path program 1 times [2019-10-02 22:10:41,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 22:10:41,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:41,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 22:10:41,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:41,954 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 22:10:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 22:10:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-10-02 22:10:42,259 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 22:10:42,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 22:10:42,260 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 22:10:42,260 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 22:10:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 22:10:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 22:10:42,261 INFO L87 Difference]: Start difference. First operand 12393 states and 15748 transitions. Second operand 4 states. [2019-10-02 22:10:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 22:10:49,378 INFO L93 Difference]: Finished difference Result 33721 states and 42912 transitions. [2019-10-02 22:10:49,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 22:10:49,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 232 [2019-10-02 22:10:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 22:10:49,472 INFO L225 Difference]: With dead ends: 33721 [2019-10-02 22:10:49,472 INFO L226 Difference]: Without dead ends: 33721 [2019-10-02 22:10:49,473 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 22:10:49,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33721 states. [2019-10-02 22:10:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33721 to 29501. [2019-10-02 22:10:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29501 states. [2019-10-02 22:10:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29501 states to 29501 states and 37975 transitions. [2019-10-02 22:10:50,793 INFO L78 Accepts]: Start accepts. Automaton has 29501 states and 37975 transitions. Word has length 232 [2019-10-02 22:10:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 22:10:50,794 INFO L475 AbstractCegarLoop]: Abstraction has 29501 states and 37975 transitions. [2019-10-02 22:10:50,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 22:10:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 29501 states and 37975 transitions. [2019-10-02 22:10:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-10-02 22:10:50,803 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 22:10:50,804 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 22:10:50,804 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 22:10:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:10:50,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1743980154, now seen corresponding path program 1 times [2019-10-02 22:10:50,809 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 22:10:50,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:50,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 22:10:50,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:10:50,811 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 22:10:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 22:10:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 58 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 22:10:51,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 22:10:51,092 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 22:10:51,094 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 298 with the following transitions: [2019-10-02 22:10:51,096 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1835], [1837], [1840], [1848], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2265], [2269], [2273], [2277], [2281], [2285], [2289], [2293], [2297], [2301], [2305], [2309], [2313], [2317], [2321], [2325], [2328], [2329], [2333], [2337], [2341], [2345], [2349], [2353], [2357], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2388], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-10-02 22:10:51,166 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 22:10:51,166 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 22:11:00,368 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 22:11:00,371 INFO L272 AbstractInterpreter]: Visited 142 different actions 142 times. Never merged. Never widened. Performed 323 root evaluator evaluations with a maximum evaluation depth of 13. Performed 323 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 22:11:00,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:11:00,374 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 22:11:10,903 INFO L227 lantSequenceWeakener]: Weakened 278 states. On average, predicates are now at 77.7% of their original sizes. [2019-10-02 22:11:10,903 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 22:11:11,002 INFO L420 sIntCurrentIteration]: We unified 296 AI predicates to 296 [2019-10-02 22:11:11,002 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 22:11:11,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 22:11:11,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2019-10-02 22:11:11,003 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 22:11:11,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 22:11:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 22:11:11,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 22:11:11,005 INFO L87 Difference]: Start difference. First operand 29501 states and 37975 transitions. Second operand 10 states. [2019-10-02 22:13:00,182 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.