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_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:29:57,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:29:57,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:29:57,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:29:57,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 18:29:57,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 18:29:57,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 18:29:57,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 18:29:57,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 18:29:57,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 18:29:57,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 18:29:57,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 18:29:57,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 18:29:57,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 18:29:57,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 18:29:57,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 18:29:57,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 18:29:57,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 18:29:57,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 18:29:57,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 18:29:57,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 18:29:57,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 18:29:57,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 18:29:57,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 18:29:57,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 18:29:57,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:29:57,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:29:57,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:29:57,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 18:29:57,831 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:29:57,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:29:57,835 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:29:57,835 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:29:57,836 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:29:57,836 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:29:57,836 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:29:57,836 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:29:57,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:29:57,837 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:29:57,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:29:57,838 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:29:57,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:29:57,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:29:57,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:29:57,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:29:57,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:29:57,840 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:29:57,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:29:57,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:29:57,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:29:57,841 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:29:57,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:29:57,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:29:57,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:29:57,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:29:57,843 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:29:57,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:29:57,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:29:57,844 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:29:57,894 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:29:57,910 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:29:57,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:29:57,914 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:29:57,915 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:29:57,915 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label44.c [2019-09-09 18:29:57,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51a22c98/59d1f4bdb8874d4a870b1c5264ecf897/FLAGcc51e1958 [2019-09-09 18:29:58,566 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:29:58,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label44.c [2019-09-09 18:29:58,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51a22c98/59d1f4bdb8874d4a870b1c5264ecf897/FLAGcc51e1958 [2019-09-09 18:29:58,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51a22c98/59d1f4bdb8874d4a870b1c5264ecf897 [2019-09-09 18:29:58,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:29:58,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:29:58,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:29:58,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:29:58,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:29:58,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:29:58" (1/1) ... [2019-09-09 18:29:58,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d915ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:58, skipping insertion in model container [2019-09-09 18:29:58,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:29:58" (1/1) ... [2019-09-09 18:29:58,858 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:29:58,922 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:29:59,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:29:59,521 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:29:59,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:29:59,750 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:29:59,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:59 WrapperNode [2019-09-09 18:29:59,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:29:59,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:29:59,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:29:59,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:29:59,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:59" (1/1) ... [2019-09-09 18:29:59,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:59" (1/1) ... [2019-09-09 18:29:59,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:59" (1/1) ... [2019-09-09 18:29:59,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:59" (1/1) ... [2019-09-09 18:29:59,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:59" (1/1) ... [2019-09-09 18:29:59,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:59" (1/1) ... [2019-09-09 18:29:59,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:59" (1/1) ... [2019-09-09 18:29:59,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:29:59,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:29:59,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:29:59,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:29:59,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:30:00,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:30:00,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:30:00,044 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:30:00,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:30:00,045 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:30:00,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:30:00,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:30:00,045 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:30:00,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:30:00,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:30:00,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:30:01,892 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:30:01,896 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:30:01,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:30:01 BoogieIcfgContainer [2019-09-09 18:30:01,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:30:01,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:30:01,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:30:01,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:30:01,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:29:58" (1/3) ... [2019-09-09 18:30:01,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494828b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:30:01, skipping insertion in model container [2019-09-09 18:30:01,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:59" (2/3) ... [2019-09-09 18:30:01,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494828b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:30:01, skipping insertion in model container [2019-09-09 18:30:01,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:30:01" (3/3) ... [2019-09-09 18:30:01,918 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label44.c [2019-09-09 18:30:01,932 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:30:01,941 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:30:01,958 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:30:01,992 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:30:01,993 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:30:01,993 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:30:01,993 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:30:01,994 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:30:01,994 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:30:01,994 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:30:01,995 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:30:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:30:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-09 18:30:02,047 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:02,048 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:30:02,051 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash -989093190, now seen corresponding path program 1 times [2019-09-09 18:30:02,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:02,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:02,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:02,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:02,125 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:02,390 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:30:02,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:30:02,391 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:02,397 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:30:02,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:30:02,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:02,417 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-09-09 18:30:04,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:30:04,626 INFO L93 Difference]: Finished difference Result 642 states and 849 transitions. [2019-09-09 18:30:04,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:30:04,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-09-09 18:30:04,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:30:04,650 INFO L225 Difference]: With dead ends: 642 [2019-09-09 18:30:04,651 INFO L226 Difference]: Without dead ends: 554 [2019-09-09 18:30:04,653 INFO L628 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 [2019-09-09 18:30:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-09-09 18:30:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 372. [2019-09-09 18:30:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-09-09 18:30:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2019-09-09 18:30:04,741 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 17 [2019-09-09 18:30:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:30:04,741 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2019-09-09 18:30:04,741 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:30:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2019-09-09 18:30:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-09 18:30:04,751 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:04,751 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 18:30:04,752 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:04,754 INFO L82 PathProgramCache]: Analyzing trace with hash 649942285, now seen corresponding path program 1 times [2019-09-09 18:30:04,754 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:04,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:04,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:04,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:04,756 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:04,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:30:04,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:30:04,980 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:04,986 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:30:04,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:30:04,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:04,988 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand 4 states. [2019-09-09 18:30:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:30:06,673 INFO L93 Difference]: Finished difference Result 1100 states and 1417 transitions. [2019-09-09 18:30:06,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:30:06,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2019-09-09 18:30:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:30:06,682 INFO L225 Difference]: With dead ends: 1100 [2019-09-09 18:30:06,682 INFO L226 Difference]: Without dead ends: 736 [2019-09-09 18:30:06,683 INFO L628 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 [2019-09-09 18:30:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-09-09 18:30:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 554. [2019-09-09 18:30:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-09-09 18:30:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 809 transitions. [2019-09-09 18:30:06,724 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 809 transitions. Word has length 100 [2019-09-09 18:30:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:30:06,724 INFO L475 AbstractCegarLoop]: Abstraction has 554 states and 809 transitions. [2019-09-09 18:30:06,725 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:30:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 809 transitions. [2019-09-09 18:30:06,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-09 18:30:06,727 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:06,727 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 18:30:06,728 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:06,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2036174565, now seen corresponding path program 1 times [2019-09-09 18:30:06,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:06,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:06,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:06,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:06,730 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:07,096 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:30:07,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-09 18:30:07,097 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:07,098 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 18:30:07,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 18:30:07,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-09 18:30:07,099 INFO L87 Difference]: Start difference. First operand 554 states and 809 transitions. Second operand 7 states. [2019-09-09 18:30:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:30:08,726 INFO L93 Difference]: Finished difference Result 780 states and 1134 transitions. [2019-09-09 18:30:08,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-09 18:30:08,727 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2019-09-09 18:30:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:30:08,740 INFO L225 Difference]: With dead ends: 780 [2019-09-09 18:30:08,741 INFO L226 Difference]: Without dead ends: 780 [2019-09-09 18:30:08,741 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-09-09 18:30:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2019-09-09 18:30:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 750. [2019-09-09 18:30:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-09-09 18:30:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1044 transitions. [2019-09-09 18:30:08,826 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1044 transitions. Word has length 112 [2019-09-09 18:30:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:30:08,835 INFO L475 AbstractCegarLoop]: Abstraction has 750 states and 1044 transitions. [2019-09-09 18:30:08,835 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 18:30:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1044 transitions. [2019-09-09 18:30:08,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-09-09 18:30:08,848 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:08,849 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:30:08,849 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:08,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1918057, now seen corresponding path program 1 times [2019-09-09 18:30:08,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:08,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:08,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:08,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:08,852 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:30:09,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:30:09,066 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:30:09,067 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 183 with the following transitions: [2019-09-09 18:30:09,071 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:30:09,130 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:30:09,131 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:30:14,432 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:30:14,434 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Performed 239 root evaluator evaluations with a maximum evaluation depth of 13. Performed 239 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:30:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:14,438 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:30:18,012 INFO L227 lantSequenceWeakener]: Weakened 163 states. On average, predicates are now at 77.42% of their original sizes. [2019-09-09 18:30:18,012 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:30:18,106 INFO L420 sIntCurrentIteration]: We unified 181 AI predicates to 181 [2019-09-09 18:30:18,106 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:30:18,107 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:30:18,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2019-09-09 18:30:18,107 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:18,108 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:30:18,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:30:18,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:30:18,109 INFO L87 Difference]: Start difference. First operand 750 states and 1044 transitions. Second operand 10 states. [2019-09-09 18:31:43,242 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:34:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:34:38,702 INFO L93 Difference]: Finished difference Result 936 states and 1241 transitions. [2019-09-09 18:34:38,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 18:34:38,702 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 182 [2019-09-09 18:34:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:34:38,708 INFO L225 Difference]: With dead ends: 936 [2019-09-09 18:34:38,708 INFO L226 Difference]: Without dead ends: 936 [2019-09-09 18:34:38,709 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-09-09 18:34:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2019-09-09 18:34:38,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 932. [2019-09-09 18:34:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2019-09-09 18:34:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1234 transitions. [2019-09-09 18:34:38,732 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1234 transitions. Word has length 182 [2019-09-09 18:34:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:34:38,732 INFO L475 AbstractCegarLoop]: Abstraction has 932 states and 1234 transitions. [2019-09-09 18:34:38,733 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:34:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1234 transitions. [2019-09-09 18:34:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-09-09 18:34:38,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:34:38,736 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:34:38,737 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:34:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:34:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash -438667603, now seen corresponding path program 1 times [2019-09-09 18:34:38,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:34:38,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:34:38,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:34:38,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:34:38,739 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:34:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:34:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:34:39,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:34:39,375 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:34:39,375 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 197 with the following transitions: [2019-09-09 18:34:39,376 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:34:39,397 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:34:39,397 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:34:44,498 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:34:44,500 INFO L272 AbstractInterpreter]: Visited 103 different actions 201 times. Merged at 4 different actions 5 times. Never widened. Performed 431 root evaluator evaluations with a maximum evaluation depth of 13. Performed 431 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:34:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:34:44,500 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:34:46,523 INFO L227 lantSequenceWeakener]: Weakened 193 states. On average, predicates are now at 77.24% of their original sizes. [2019-09-09 18:34:46,523 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:34:46,632 INFO L420 sIntCurrentIteration]: We unified 195 AI predicates to 195 [2019-09-09 18:34:46,633 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:34:46,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:34:46,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:34:46,633 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:34:46,634 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:34:46,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:34:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:34:46,635 INFO L87 Difference]: Start difference. First operand 932 states and 1234 transitions. Second operand 11 states. [2019-09-09 18:35:19,948 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:35:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:35:43,276 INFO L93 Difference]: Finished difference Result 1148 states and 1460 transitions. [2019-09-09 18:35:43,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:35:43,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 196 [2019-09-09 18:35:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:35:43,287 INFO L225 Difference]: With dead ends: 1148 [2019-09-09 18:35:43,288 INFO L226 Difference]: Without dead ends: 1148 [2019-09-09 18:35:43,288 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:35:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2019-09-09 18:35:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1116. [2019-09-09 18:35:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1116 states. [2019-09-09 18:35:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1425 transitions. [2019-09-09 18:35:43,326 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1425 transitions. Word has length 196 [2019-09-09 18:35:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:35:43,327 INFO L475 AbstractCegarLoop]: Abstraction has 1116 states and 1425 transitions. [2019-09-09 18:35:43,327 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:35:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1425 transitions. [2019-09-09 18:35:43,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-09-09 18:35:43,332 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:35:43,332 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:35:43,332 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:35:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:35:43,333 INFO L82 PathProgramCache]: Analyzing trace with hash -316356835, now seen corresponding path program 1 times [2019-09-09 18:35:43,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:35:43,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:35:43,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:35:43,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:35:43,335 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:35:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:35:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 102 proven. 95 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 18:35:43,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:35:43,630 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:35:43,636 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 293 with the following transitions: [2019-09-09 18:35:43,639 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:35:43,649 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:35:43,649 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:35:58,812 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:35:58,812 INFO L272 AbstractInterpreter]: Visited 119 different actions 233 times. Merged at 4 different actions 5 times. Never widened. Performed 557 root evaluator evaluations with a maximum evaluation depth of 13. Performed 557 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:35:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:35:58,813 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:36:07,031 INFO L227 lantSequenceWeakener]: Weakened 289 states. On average, predicates are now at 77.28% of their original sizes. [2019-09-09 18:36:07,031 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:36:07,109 INFO L420 sIntCurrentIteration]: We unified 291 AI predicates to 291 [2019-09-09 18:36:07,109 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:36:07,110 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:36:07,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 18:36:07,110 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:36:07,111 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:36:07,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:36:07,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:36:07,111 INFO L87 Difference]: Start difference. First operand 1116 states and 1425 transitions. Second operand 11 states. [2019-09-09 18:36:51,257 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:39:33,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:39:33,244 INFO L93 Difference]: Finished difference Result 1302 states and 1625 transitions. [2019-09-09 18:39:33,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:39:33,244 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 292 [2019-09-09 18:39:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:39:33,251 INFO L225 Difference]: With dead ends: 1302 [2019-09-09 18:39:33,251 INFO L226 Difference]: Without dead ends: 1302 [2019-09-09 18:39:33,252 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 18:39:33,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2019-09-09 18:39:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1300. [2019-09-09 18:39:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1300 states. [2019-09-09 18:39:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1623 transitions. [2019-09-09 18:39:33,290 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1623 transitions. Word has length 292 [2019-09-09 18:39:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:39:33,291 INFO L475 AbstractCegarLoop]: Abstraction has 1300 states and 1623 transitions. [2019-09-09 18:39:33,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:39:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1623 transitions. [2019-09-09 18:39:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2019-09-09 18:39:33,297 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:39:33,297 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:39:33,297 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:39:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash 603853409, now seen corresponding path program 1 times [2019-09-09 18:39:33,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:39:33,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:33,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:39:33,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:33,299 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:39:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:39:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 116 proven. 95 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-09-09 18:39:33,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:39:33,546 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:39:33,546 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 307 with the following transitions: [2019-09-09 18:39:33,547 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:39:33,554 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:39:33,554 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:39:53,558 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:39:53,559 INFO L272 AbstractInterpreter]: Visited 119 different actions 355 times. Merged at 6 different actions 18 times. Never widened. Performed 783 root evaluator evaluations with a maximum evaluation depth of 13. Performed 783 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:39:53,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:53,559 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:40:03,391 INFO L227 lantSequenceWeakener]: Weakened 303 states. On average, predicates are now at 77.28% of their original sizes. [2019-09-09 18:40:03,391 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:40:03,467 INFO L420 sIntCurrentIteration]: We unified 305 AI predicates to 305 [2019-09-09 18:40:03,467 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:40:03,468 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:40:03,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 18:40:03,468 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:40:03,469 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:40:03,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:40:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:40:03,470 INFO L87 Difference]: Start difference. First operand 1300 states and 1623 transitions. Second operand 11 states. [2019-09-09 18:40:51,157 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:43:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:43:49,264 INFO L93 Difference]: Finished difference Result 1490 states and 1826 transitions. [2019-09-09 18:43:49,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:43:49,264 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 306 [2019-09-09 18:43:49,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:43:49,271 INFO L225 Difference]: With dead ends: 1490 [2019-09-09 18:43:49,271 INFO L226 Difference]: Without dead ends: 1490 [2019-09-09 18:43:49,272 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 18:43:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2019-09-09 18:43:49,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1116. [2019-09-09 18:43:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1116 states. [2019-09-09 18:43:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1430 transitions. [2019-09-09 18:43:49,300 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1430 transitions. Word has length 306 [2019-09-09 18:43:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:43:49,300 INFO L475 AbstractCegarLoop]: Abstraction has 1116 states and 1430 transitions. [2019-09-09 18:43:49,301 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:43:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1430 transitions. [2019-09-09 18:43:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2019-09-09 18:43:49,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:43:49,306 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:43:49,306 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:43:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:43:49,307 INFO L82 PathProgramCache]: Analyzing trace with hash -298790671, now seen corresponding path program 1 times [2019-09-09 18:43:49,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:43:49,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:43:49,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:43:49,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:43:49,308 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:43:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:43:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 166 proven. 77 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 18:43:49,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:43:49,620 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:43:49,621 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 323 with the following transitions: [2019-09-09 18:43:49,621 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:43:49,624 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:43:49,624 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:44:03,510 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.