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/Problem14_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:29:10,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:29:10,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:29:10,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 20:29:10,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 20:29:10,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 20:29:10,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 20:29:10,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 20:29:10,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 20:29:10,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 20:29:10,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 20:29:10,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 20:29:10,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 20:29:10,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 20:29:10,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 20:29:10,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 20:29:10,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 20:29:10,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 20:29:10,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 20:29:10,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 20:29:10,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 20:29:10,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 20:29:10,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 20:29:10,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 20:29:10,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 20:29:10,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 20:29:10,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 20:29:10,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 20:29:10,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 20:29:10,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 20:29:10,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 20:29:10,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 20:29:10,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 20:29:10,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 20:29:10,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 20:29:10,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 20:29:10,755 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 20:29:10,770 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:29:10,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:29:10,771 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:29:10,771 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:29:10,772 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:29:10,772 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:29:10,772 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:29:10,772 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:29:10,773 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:29:10,773 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:29:10,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:29:10,774 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:29:10,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:29:10,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:29:10,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:29:10,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:29:10,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:29:10,775 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:29:10,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:29:10,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:29:10,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:29:10,776 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:29:10,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:29:10,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:29:10,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:29:10,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:29:10,777 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:29:10,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:29:10,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:29:10,777 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:29:10,825 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:29:10,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:29:10,845 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:29:10,847 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:29:10,847 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:29:10,848 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-10-02 20:29:10,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8840d87ee/4393b94f902c47a2a0fcc7c902ff3347/FLAG71a7c9ef3 [2019-10-02 20:29:11,496 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:29:11,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-10-02 20:29:11,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8840d87ee/4393b94f902c47a2a0fcc7c902ff3347/FLAG71a7c9ef3 [2019-10-02 20:29:11,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8840d87ee/4393b94f902c47a2a0fcc7c902ff3347 [2019-10-02 20:29:11,739 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:29:11,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:29:11,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:29:11,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:29:11,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:29:11,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:29:11" (1/1) ... [2019-10-02 20:29:11,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7f709c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:29:11, skipping insertion in model container [2019-10-02 20:29:11,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:29:11" (1/1) ... [2019-10-02 20:29:11,760 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:29:11,829 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:29:12,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:29:12,535 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:29:12,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:29:12,702 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:29:12,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:29:12 WrapperNode [2019-10-02 20:29:12,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:29:12,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:29:12,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:29:12,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:29:12,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:29:12" (1/1) ... [2019-10-02 20:29:12,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:29:12" (1/1) ... [2019-10-02 20:29:12,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:29:12" (1/1) ... [2019-10-02 20:29:12,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:29:12" (1/1) ... [2019-10-02 20:29:12,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:29:12" (1/1) ... [2019-10-02 20:29:12,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:29:12" (1/1) ... [2019-10-02 20:29:12,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:29:12" (1/1) ... [2019-10-02 20:29:12,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:29:12,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:29:12,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:29:12,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:29:12,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:29:12" (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 20:29:12,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:29:12,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:29:12,926 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:29:12,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:29:12,926 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:29:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:29:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:29:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:29:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:29:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:29:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:29:14,523 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:29:14,524 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:29:14,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:29:14 BoogieIcfgContainer [2019-10-02 20:29:14,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:29:14,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:29:14,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:29:14,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:29:14,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:29:11" (1/3) ... [2019-10-02 20:29:14,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397d27be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:29:14, skipping insertion in model container [2019-10-02 20:29:14,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:29:12" (2/3) ... [2019-10-02 20:29:14,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397d27be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:29:14, skipping insertion in model container [2019-10-02 20:29:14,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:29:14" (3/3) ... [2019-10-02 20:29:14,534 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label15.c [2019-10-02 20:29:14,543 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:29:14,551 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:29:14,568 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:29:14,595 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:29:14,595 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:29:14,596 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:29:14,596 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:29:14,596 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:29:14,596 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:29:14,597 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:29:14,597 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:29:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-02 20:29:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-02 20:29:14,633 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:29:14,635 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:29:14,636 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:29:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:29:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash -598870286, now seen corresponding path program 1 times [2019-10-02 20:29:14,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:29:14,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:14,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:29:14,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:14,706 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:29:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:29:15,057 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 20:29:15,060 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:29:15,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 20:29:15,061 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:29:15,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 20:29:15,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 20:29:15,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 20:29:15,090 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-02 20:29:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:29:16,251 INFO L93 Difference]: Finished difference Result 440 states and 711 transitions. [2019-10-02 20:29:16,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 20:29:16,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-10-02 20:29:16,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:29:16,271 INFO L225 Difference]: With dead ends: 440 [2019-10-02 20:29:16,271 INFO L226 Difference]: Without dead ends: 372 [2019-10-02 20:29:16,273 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 20:29:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-02 20:29:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-02 20:29:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-02 20:29:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-02 20:29:16,356 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 71 [2019-10-02 20:29:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:29:16,356 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-02 20:29:16,357 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 20:29:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-02 20:29:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-02 20:29:16,363 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:29:16,363 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:29:16,364 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:29:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:29:16,364 INFO L82 PathProgramCache]: Analyzing trace with hash 96309737, now seen corresponding path program 1 times [2019-10-02 20:29:16,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:29:16,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:16,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:29:16,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:16,366 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:29:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:29:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:29:16,614 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:29:16,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:29:16,614 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:29:16,616 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:29:16,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:29:16,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:29:16,619 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-02 20:29:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:29:18,112 INFO L93 Difference]: Finished difference Result 756 states and 1199 transitions. [2019-10-02 20:29:18,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:29:18,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2019-10-02 20:29:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:29:18,136 INFO L225 Difference]: With dead ends: 756 [2019-10-02 20:29:18,136 INFO L226 Difference]: Without dead ends: 756 [2019-10-02 20:29:18,137 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 20:29:18,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-10-02 20:29:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-10-02 20:29:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-10-02 20:29:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-10-02 20:29:18,190 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 140 [2019-10-02 20:29:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:29:18,191 INFO L475 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-10-02 20:29:18,191 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:29:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-10-02 20:29:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-02 20:29:18,194 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:29:18,195 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:29:18,195 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:29:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:29:18,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1593048690, now seen corresponding path program 1 times [2019-10-02 20:29:18,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:29:18,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:18,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:29:18,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:18,198 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:29:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:29:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:29:18,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:29:18,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:29:18,311 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:29:18,312 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:29:18,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:29:18,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:29:18,313 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-10-02 20:29:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:29:19,660 INFO L93 Difference]: Finished difference Result 1158 states and 1699 transitions. [2019-10-02 20:29:19,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:29:19,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-10-02 20:29:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:29:19,668 INFO L225 Difference]: With dead ends: 1158 [2019-10-02 20:29:19,668 INFO L226 Difference]: Without dead ends: 1158 [2019-10-02 20:29:19,669 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 20:29:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-10-02 20:29:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-10-02 20:29:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-10-02 20:29:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-10-02 20:29:19,716 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 141 [2019-10-02 20:29:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:29:19,717 INFO L475 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-10-02 20:29:19,717 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:29:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-10-02 20:29:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-02 20:29:19,721 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:29:19,721 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:29:19,721 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:29:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:29:19,722 INFO L82 PathProgramCache]: Analyzing trace with hash -552951950, now seen corresponding path program 1 times [2019-10-02 20:29:19,722 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:29:19,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:19,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:29:19,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:19,731 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:29:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:29:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:29:19,847 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:29:19,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:29:19,847 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:29:19,848 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:29:19,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:29:19,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:29:19,850 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-10-02 20:29:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:29:20,953 INFO L93 Difference]: Finished difference Result 1748 states and 2410 transitions. [2019-10-02 20:29:20,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 20:29:20,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-10-02 20:29:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:29:20,970 INFO L225 Difference]: With dead ends: 1748 [2019-10-02 20:29:20,970 INFO L226 Difference]: Without dead ends: 1748 [2019-10-02 20:29:20,972 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 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 20:29:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2019-10-02 20:29:21,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1326. [2019-10-02 20:29:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2019-10-02 20:29:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1863 transitions. [2019-10-02 20:29:21,067 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1863 transitions. Word has length 143 [2019-10-02 20:29:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:29:21,068 INFO L475 AbstractCegarLoop]: Abstraction has 1326 states and 1863 transitions. [2019-10-02 20:29:21,069 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:29:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1863 transitions. [2019-10-02 20:29:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-02 20:29:21,079 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:29:21,079 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, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 20:29:21,079 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:29:21,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:29:21,080 INFO L82 PathProgramCache]: Analyzing trace with hash -621255906, now seen corresponding path program 1 times [2019-10-02 20:29:21,080 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:29:21,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:21,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:29:21,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:21,084 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:29:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:29:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-02 20:29:21,332 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:29:21,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:29:21,332 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:29:21,333 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:29:21,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:29:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:29:21,334 INFO L87 Difference]: Start difference. First operand 1326 states and 1863 transitions. Second operand 4 states. [2019-10-02 20:29:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:29:22,843 INFO L93 Difference]: Finished difference Result 2806 states and 3788 transitions. [2019-10-02 20:29:22,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:29:22,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 227 [2019-10-02 20:29:22,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:29:22,859 INFO L225 Difference]: With dead ends: 2806 [2019-10-02 20:29:22,860 INFO L226 Difference]: Without dead ends: 2806 [2019-10-02 20:29:22,861 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 20:29:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2019-10-02 20:29:22,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2258. [2019-10-02 20:29:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2258 states. [2019-10-02 20:29:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 3058 transitions. [2019-10-02 20:29:22,924 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 3058 transitions. Word has length 227 [2019-10-02 20:29:22,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:29:22,925 INFO L475 AbstractCegarLoop]: Abstraction has 2258 states and 3058 transitions. [2019-10-02 20:29:22,926 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:29:22,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 3058 transitions. [2019-10-02 20:29:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-10-02 20:29:22,936 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:29:22,937 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:29:22,937 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:29:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:29:22,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1660138625, now seen corresponding path program 1 times [2019-10-02 20:29:22,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:29:22,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:22,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:29:22,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:22,939 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:29:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:29:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:29:23,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:29:23,267 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:29:23,268 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 337 with the following transitions: [2019-10-02 20:29:23,270 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [477], [479], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:29:23,332 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:29:23,332 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:29:40,382 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:29:40,384 INFO L272 AbstractInterpreter]: Visited 158 different actions 158 times. Never merged. Never widened. Performed 355 root evaluator evaluations with a maximum evaluation depth of 14. Performed 355 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 20:29:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:29:40,388 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:29:57,950 INFO L227 lantSequenceWeakener]: Weakened 317 states. On average, predicates are now at 78.12% of their original sizes. [2019-10-02 20:29:57,950 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:29:58,050 INFO L420 sIntCurrentIteration]: We unified 335 AI predicates to 335 [2019-10-02 20:29:58,051 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:29:58,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:29:58,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-10-02 20:29:58,052 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:29:58,053 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 20:29:58,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 20:29:58,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-02 20:29:58,054 INFO L87 Difference]: Start difference. First operand 2258 states and 3058 transitions. Second operand 12 states. [2019-10-02 20:31:40,769 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:33:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:33:54,210 INFO L93 Difference]: Finished difference Result 2262 states and 3039 transitions. [2019-10-02 20:33:54,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 20:33:54,210 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 336 [2019-10-02 20:33:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:33:54,221 INFO L225 Difference]: With dead ends: 2262 [2019-10-02 20:33:54,221 INFO L226 Difference]: Without dead ends: 2262 [2019-10-02 20:33:54,222 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-10-02 20:33:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2019-10-02 20:33:54,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2258. [2019-10-02 20:33:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2258 states. [2019-10-02 20:33:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 3032 transitions. [2019-10-02 20:33:54,276 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 3032 transitions. Word has length 336 [2019-10-02 20:33:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:33:54,276 INFO L475 AbstractCegarLoop]: Abstraction has 2258 states and 3032 transitions. [2019-10-02 20:33:54,276 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 20:33:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 3032 transitions. [2019-10-02 20:33:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-10-02 20:33:54,288 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:33:54,289 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2019-10-02 20:33:54,289 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:33:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:33:54,290 INFO L82 PathProgramCache]: Analyzing trace with hash -178670679, now seen corresponding path program 1 times [2019-10-02 20:33:54,290 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:33:54,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:33:54,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:33:54,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:33:54,291 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:33:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:33:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 278 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 20:33:55,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:33:55,077 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:33:55,077 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 421 with the following transitions: [2019-10-02 20:33:55,078 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [477], [479], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:33:55,086 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:33:55,087 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:34:18,934 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:34:18,936 INFO L272 AbstractInterpreter]: Visited 162 different actions 319 times. Merged at 4 different actions 5 times. Never widened. Performed 607 root evaluator evaluations with a maximum evaluation depth of 14. Performed 607 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 20:34:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:34:18,936 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:34:27,659 INFO L227 lantSequenceWeakener]: Weakened 417 states. On average, predicates are now at 77.86% of their original sizes. [2019-10-02 20:34:27,659 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:34:27,744 INFO L420 sIntCurrentIteration]: We unified 419 AI predicates to 419 [2019-10-02 20:34:27,745 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:34:27,745 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:34:27,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2019-10-02 20:34:27,746 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:34:27,748 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 20:34:27,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 20:34:27,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-02 20:34:27,749 INFO L87 Difference]: Start difference. First operand 2258 states and 3032 transitions. Second operand 12 states. [2019-10-02 20:35:05,898 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:38:37,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:38:37,477 INFO L93 Difference]: Finished difference Result 2474 states and 3248 transitions. [2019-10-02 20:38:37,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 20:38:37,477 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 420 [2019-10-02 20:38:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:38:37,489 INFO L225 Difference]: With dead ends: 2474 [2019-10-02 20:38:37,489 INFO L226 Difference]: Without dead ends: 2259 [2019-10-02 20:38:37,490 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-10-02 20:38:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2019-10-02 20:38:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2258. [2019-10-02 20:38:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2258 states. [2019-10-02 20:38:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 3026 transitions. [2019-10-02 20:38:37,542 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 3026 transitions. Word has length 420 [2019-10-02 20:38:37,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:38:37,542 INFO L475 AbstractCegarLoop]: Abstraction has 2258 states and 3026 transitions. [2019-10-02 20:38:37,542 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 20:38:37,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 3026 transitions. [2019-10-02 20:38:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2019-10-02 20:38:37,554 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:38:37,554 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 20:38:37,555 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:38:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:38:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1746779541, now seen corresponding path program 1 times [2019-10-02 20:38:37,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:38:37,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:38:37,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:38:37,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:38:37,557 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:38:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:38:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 249 proven. 222 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-02 20:38:38,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:38:38,041 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:38:38,041 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 447 with the following transitions: [2019-10-02 20:38:38,041 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [477], [479], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:38:38,046 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:38:38,046 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:39:09,905 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:39:09,906 INFO L272 AbstractInterpreter]: Visited 162 different actions 319 times. Merged at 4 different actions 5 times. Never widened. Performed 729 root evaluator evaluations with a maximum evaluation depth of 14. Performed 729 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 20:39:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:39:09,906 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:39:31,291 INFO L227 lantSequenceWeakener]: Weakened 443 states. On average, predicates are now at 77.83% of their original sizes. [2019-10-02 20:39:31,292 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:39:31,396 INFO L420 sIntCurrentIteration]: We unified 445 AI predicates to 445 [2019-10-02 20:39:31,397 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:39:31,397 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:39:31,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2019-10-02 20:39:31,397 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:39:31,398 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 20:39:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 20:39:31,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-02 20:39:31,399 INFO L87 Difference]: Start difference. First operand 2258 states and 3026 transitions. Second operand 13 states. [2019-10-02 20:40:20,617 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:42:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:42:00,841 INFO L93 Difference]: Finished difference Result 2444 states and 3219 transitions. [2019-10-02 20:42:00,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 20:42:00,841 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 446 [2019-10-02 20:42:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:42:00,852 INFO L225 Difference]: With dead ends: 2444 [2019-10-02 20:42:00,853 INFO L226 Difference]: Without dead ends: 2444 [2019-10-02 20:42:00,854 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2019-10-02 20:42:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2019-10-02 20:42:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2442. [2019-10-02 20:42:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2442 states. [2019-10-02 20:42:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3217 transitions. [2019-10-02 20:42:00,905 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3217 transitions. Word has length 446 [2019-10-02 20:42:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:42:00,906 INFO L475 AbstractCegarLoop]: Abstraction has 2442 states and 3217 transitions. [2019-10-02 20:42:00,906 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 20:42:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3217 transitions. [2019-10-02 20:42:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2019-10-02 20:42:00,923 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:42:00,924 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 20:42:00,924 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:42:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:42:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1556179822, now seen corresponding path program 1 times [2019-10-02 20:42:00,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:42:00,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:42:00,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:42:00,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:42:00,928 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:42:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:42:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 362 proven. 483 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 20:42:01,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:42:01,860 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:42:01,860 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 534 with the following transitions: [2019-10-02 20:42:01,860 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [477], [479], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:42:01,864 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:42:01,864 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:42:42,943 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:42:42,944 INFO L272 AbstractInterpreter]: Visited 163 different actions 481 times. Merged at 6 different actions 12 times. Never widened. Performed 928 root evaluator evaluations with a maximum evaluation depth of 14. Performed 928 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2019-10-02 20:42:42,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:42:42,944 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:42:52,892 INFO L227 lantSequenceWeakener]: Weakened 530 states. On average, predicates are now at 77.75% of their original sizes. [2019-10-02 20:42:52,892 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:42:52,954 INFO L420 sIntCurrentIteration]: We unified 532 AI predicates to 532 [2019-10-02 20:42:52,954 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:42:52,955 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:42:52,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 24 [2019-10-02 20:42:52,955 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:42:52,956 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:42:52,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:42:52,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:42:52,956 INFO L87 Difference]: Start difference. First operand 2442 states and 3217 transitions. Second operand 10 states. [2019-10-02 20:43:26,555 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.