java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 14:09:50,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 14:09:50,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 14:09:50,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 14:09:50,658 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 14:09:50,673 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 14:09:50,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 14:09:50,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 14:09:50,674 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 14:09:50,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 14:09:50,674 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 14:09:50,675 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 14:09:50,675 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 14:09:50,675 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 14:09:50,675 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 14:09:50,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 14:09:50,676 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 14:09:50,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 14:09:50,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 14:09:50,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 14:09:50,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 14:09:50,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 14:09:50,677 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 14:09:50,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 14:09:50,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 14:09:50,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 14:09:50,678 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 14:09:50,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 14:09:50,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:09:50,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 14:09:50,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 14:09:50,679 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 14:09:50,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 14:09:50,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 14:09:50,680 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 14:09:50,708 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 14:09:50,721 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 14:09:50,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 14:09:50,726 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 14:09:50,726 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 14:09:50,727 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label16.c [2019-09-09 14:09:50,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32358a71b/121e5fbd2b1048a29f704b340172dc07/FLAGc7fb6916f [2019-09-09 14:09:51,357 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 14:09:51,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label16.c [2019-09-09 14:09:51,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32358a71b/121e5fbd2b1048a29f704b340172dc07/FLAGc7fb6916f [2019-09-09 14:09:51,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32358a71b/121e5fbd2b1048a29f704b340172dc07 [2019-09-09 14:09:51,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 14:09:51,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 14:09:51,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 14:09:51,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 14:09:51,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 14:09:51,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:09:51" (1/1) ... [2019-09-09 14:09:51,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6576007c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:09:51, skipping insertion in model container [2019-09-09 14:09:51,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:09:51" (1/1) ... [2019-09-09 14:09:51,654 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 14:09:51,717 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 14:09:52,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:09:52,284 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 14:09:52,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:09:52,444 INFO L192 MainTranslator]: Completed translation [2019-09-09 14:09:52,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:09:52 WrapperNode [2019-09-09 14:09:52,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 14:09:52,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 14:09:52,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 14:09:52,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 14:09:52,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:09:52" (1/1) ... [2019-09-09 14:09:52,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:09:52" (1/1) ... [2019-09-09 14:09:52,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:09:52" (1/1) ... [2019-09-09 14:09:52,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:09:52" (1/1) ... [2019-09-09 14:09:52,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:09:52" (1/1) ... [2019-09-09 14:09:52,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:09:52" (1/1) ... [2019-09-09 14:09:52,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:09:52" (1/1) ... [2019-09-09 14:09:52,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 14:09:52,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 14:09:52,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 14:09:52,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 14:09:52,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:09:52" (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 14:09:52,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 14:09:52,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 14:09:52,673 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 14:09:52,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 14:09:52,673 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 14:09:52,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 14:09:52,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 14:09:52,674 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 14:09:52,674 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 14:09:52,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 14:09:52,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 14:09:53,858 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 14:09:53,858 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 14:09:53,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:09:53 BoogieIcfgContainer [2019-09-09 14:09:53,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 14:09:53,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 14:09:53,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 14:09:53,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 14:09:53,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 02:09:51" (1/3) ... [2019-09-09 14:09:53,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8023725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:09:53, skipping insertion in model container [2019-09-09 14:09:53,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:09:52" (2/3) ... [2019-09-09 14:09:53,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8023725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:09:53, skipping insertion in model container [2019-09-09 14:09:53,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:09:53" (3/3) ... [2019-09-09 14:09:53,868 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label16.c [2019-09-09 14:09:53,877 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 14:09:53,886 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 14:09:53,902 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 14:09:53,932 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 14:09:53,932 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 14:09:53,932 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 14:09:53,933 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 14:09:53,934 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 14:09:53,934 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 14:09:53,934 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 14:09:53,935 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 14:09:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-09-09 14:09:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-09 14:09:53,968 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:09:53,969 INFO L399 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] [2019-09-09 14:09:53,971 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:09:53,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:09:53,977 INFO L82 PathProgramCache]: Analyzing trace with hash -369766826, now seen corresponding path program 1 times [2019-09-09 14:09:53,980 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:09:54,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:09:54,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:09:54,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:09:54,020 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:09:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:09:54,297 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 14:09:54,299 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:09:54,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 14:09:54,300 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:09:54,306 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 14:09:54,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 14:09:54,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 14:09:54,326 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-09-09 14:09:55,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:09:55,300 INFO L93 Difference]: Finished difference Result 362 states and 555 transitions. [2019-09-09 14:09:55,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 14:09:55,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-09-09 14:09:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:09:55,329 INFO L225 Difference]: With dead ends: 362 [2019-09-09 14:09:55,330 INFO L226 Difference]: Without dead ends: 294 [2019-09-09 14:09:55,333 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 14:09:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-09-09 14:09:55,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-09-09 14:09:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-09-09 14:09:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-09-09 14:09:55,404 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 39 [2019-09-09 14:09:55,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:09:55,405 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-09-09 14:09:55,405 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 14:09:55,405 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-09-09 14:09:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-09-09 14:09:55,412 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:09:55,413 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:09:55,413 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:09:55,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:09:55,414 INFO L82 PathProgramCache]: Analyzing trace with hash -986233207, now seen corresponding path program 1 times [2019-09-09 14:09:55,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:09:55,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:09:55,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:09:55,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:09:55,416 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:09:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:09:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:09:55,688 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:09:55,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 14:09:55,689 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:09:55,692 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 14:09:55,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 14:09:55,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 14:09:55,693 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 4 states. [2019-09-09 14:09:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:09:56,866 INFO L93 Difference]: Finished difference Result 866 states and 1202 transitions. [2019-09-09 14:09:56,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 14:09:56,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-09-09 14:09:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:09:56,875 INFO L225 Difference]: With dead ends: 866 [2019-09-09 14:09:56,876 INFO L226 Difference]: Without dead ends: 866 [2019-09-09 14:09:56,877 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 14:09:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-09-09 14:09:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 723. [2019-09-09 14:09:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2019-09-09 14:09:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1036 transitions. [2019-09-09 14:09:56,926 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1036 transitions. Word has length 158 [2019-09-09 14:09:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:09:56,927 INFO L475 AbstractCegarLoop]: Abstraction has 723 states and 1036 transitions. [2019-09-09 14:09:56,927 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 14:09:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1036 transitions. [2019-09-09 14:09:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-09-09 14:09:56,932 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:09:56,933 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:09:56,933 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:09:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:09:56,934 INFO L82 PathProgramCache]: Analyzing trace with hash -585229963, now seen corresponding path program 1 times [2019-09-09 14:09:56,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:09:56,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:09:56,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:09:56,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:09:56,935 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:09:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:09:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:09:57,077 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:09:57,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 14:09:57,077 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:09:57,078 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 14:09:57,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 14:09:57,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 14:09:57,079 INFO L87 Difference]: Start difference. First operand 723 states and 1036 transitions. Second operand 5 states. [2019-09-09 14:09:58,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:09:58,081 INFO L93 Difference]: Finished difference Result 1182 states and 1624 transitions. [2019-09-09 14:09:58,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 14:09:58,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2019-09-09 14:09:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:09:58,091 INFO L225 Difference]: With dead ends: 1182 [2019-09-09 14:09:58,092 INFO L226 Difference]: Without dead ends: 1182 [2019-09-09 14:09:58,092 INFO L628 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 [2019-09-09 14:09:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2019-09-09 14:09:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1172. [2019-09-09 14:09:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2019-09-09 14:09:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1604 transitions. [2019-09-09 14:09:58,141 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1604 transitions. Word has length 164 [2019-09-09 14:09:58,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:09:58,142 INFO L475 AbstractCegarLoop]: Abstraction has 1172 states and 1604 transitions. [2019-09-09 14:09:58,142 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 14:09:58,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1604 transitions. [2019-09-09 14:09:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-09-09 14:09:58,154 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:09:58,154 INFO L399 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:09:58,154 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:09:58,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:09:58,156 INFO L82 PathProgramCache]: Analyzing trace with hash 385637137, now seen corresponding path program 1 times [2019-09-09 14:09:58,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:09:58,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:09:58,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:09:58,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:09:58,157 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:09:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:09:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 14:09:58,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:09:58,485 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:09:58,486 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 239 with the following transitions: [2019-09-09 14:09:58,490 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], [221], [223], [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], [514], [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], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [718], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:09:58,602 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:09:58,603 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:10:37,082 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:10:37,084 INFO L272 AbstractInterpreter]: Visited 130 different actions 130 times. Never merged. Never widened. Performed 167 root evaluator evaluations with a maximum evaluation depth of 16. Performed 167 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 14:10:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:10:37,089 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:11:12,878 INFO L227 lantSequenceWeakener]: Weakened 229 states. On average, predicates are now at 73.02% of their original sizes. [2019-09-09 14:11:12,878 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:11:12,918 INFO L420 sIntCurrentIteration]: We unified 237 AI predicates to 237 [2019-09-09 14:11:12,918 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:11:12,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:11:12,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-09-09 14:11:12,919 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:11:12,920 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 14:11:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 14:11:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 14:11:12,921 INFO L87 Difference]: Start difference. First operand 1172 states and 1604 transitions. Second operand 7 states. [2019-09-09 14:11:17,472 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:14:17,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:14:17,799 INFO L93 Difference]: Finished difference Result 1316 states and 1755 transitions. [2019-09-09 14:14:17,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:14:17,800 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 238 [2019-09-09 14:14:17,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:14:17,807 INFO L225 Difference]: With dead ends: 1316 [2019-09-09 14:14:17,807 INFO L226 Difference]: Without dead ends: 1316 [2019-09-09 14:14:17,808 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-09-09 14:14:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2019-09-09 14:14:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1315. [2019-09-09 14:14:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1315 states. [2019-09-09 14:14:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1754 transitions. [2019-09-09 14:14:17,843 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1754 transitions. Word has length 238 [2019-09-09 14:14:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:14:17,844 INFO L475 AbstractCegarLoop]: Abstraction has 1315 states and 1754 transitions. [2019-09-09 14:14:17,844 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 14:14:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1754 transitions. [2019-09-09 14:14:17,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-09-09 14:14:17,848 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:14:17,849 INFO L399 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:14:17,849 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:14:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:14:17,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1331299086, now seen corresponding path program 1 times [2019-09-09 14:14:17,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:14:17,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:14:17,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:14:17,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:14:17,852 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:14:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:14:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:14:18,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:14:18,037 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:14:18,037 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 244 with the following transitions: [2019-09-09 14:14:18,039 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], [221], [223], [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], [534], [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], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [718], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:14:18,053 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:14:18,054 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:14:29,186 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:15:37,975 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:15:37,976 INFO L272 AbstractInterpreter]: Visited 133 different actions 259 times. Merged at 3 different actions 3 times. Never widened. Performed 393 root evaluator evaluations with a maximum evaluation depth of 16. Performed 393 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:15:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:15:37,977 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:16:20,243 INFO L227 lantSequenceWeakener]: Weakened 240 states. On average, predicates are now at 73.05% of their original sizes. [2019-09-09 14:16:20,244 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:16:20,350 INFO L420 sIntCurrentIteration]: We unified 242 AI predicates to 242 [2019-09-09 14:16:20,351 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:16:20,351 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:16:20,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 14:16:20,351 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:16:20,352 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 14:16:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 14:16:20,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 14:16:20,353 INFO L87 Difference]: Start difference. First operand 1315 states and 1754 transitions. Second operand 11 states. [2019-09-09 14:20:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:20:31,138 INFO L93 Difference]: Finished difference Result 1482 states and 1933 transitions. [2019-09-09 14:20:31,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 14:20:31,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 243 [2019-09-09 14:20:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:20:31,146 INFO L225 Difference]: With dead ends: 1482 [2019-09-09 14:20:31,147 INFO L226 Difference]: Without dead ends: 1482 [2019-09-09 14:20:31,147 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 233 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 14:20:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2019-09-09 14:20:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1315. [2019-09-09 14:20:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1315 states. [2019-09-09 14:20:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1754 transitions. [2019-09-09 14:20:31,184 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1754 transitions. Word has length 243 [2019-09-09 14:20:31,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:20:31,185 INFO L475 AbstractCegarLoop]: Abstraction has 1315 states and 1754 transitions. [2019-09-09 14:20:31,185 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 14:20:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1754 transitions. [2019-09-09 14:20:31,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-09-09 14:20:31,191 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:20:31,191 INFO L399 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:20:31,192 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:20:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:20:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash -406757270, now seen corresponding path program 1 times [2019-09-09 14:20:31,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:20:31,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:20:31,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:20:31,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:20:31,194 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:20:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:20:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 46 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 14:20:31,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:20:31,451 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:20:31,451 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 280 with the following transitions: [2019-09-09 14:20:31,452 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], [221], [223], [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], [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], [667], [671], [675], [678], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [718], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:20:31,468 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:20:31,469 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:21:06,490 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:22:30,534 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:22:30,535 INFO L272 AbstractInterpreter]: Visited 133 different actions 260 times. Merged at 4 different actions 4 times. Never widened. Performed 494 root evaluator evaluations with a maximum evaluation depth of 16. Performed 494 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:22:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:22:30,535 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates