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/Problem17_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:19:55,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:19:55,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:19:55,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:19:55,925 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 21:19:55,952 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:19:55,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:19:55,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:19:55,954 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:19:55,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:19:55,955 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:19:55,955 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:19:55,955 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:19:55,955 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:19:55,955 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:19:55,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:19:55,957 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:19:55,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:19:55,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:19:55,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:19:55,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:19:55,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:19:55,959 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:19:55,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:19:55,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:19:55,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:19:55,960 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:19:55,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:19:55,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:19:55,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:19:55,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:19:55,961 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:19:55,961 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:19:55,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:19:55,962 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:19:56,011 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:19:56,024 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:19:56,027 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:19:56,028 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:19:56,028 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:19:56,029 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label31.c [2019-09-09 21:19:56,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97de7b0ab/2c0969c1e1774e19a453a766521513d6/FLAG0c8d4d583 [2019-09-09 21:19:56,867 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:19:56,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label31.c [2019-09-09 21:19:56,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97de7b0ab/2c0969c1e1774e19a453a766521513d6/FLAG0c8d4d583 [2019-09-09 21:19:56,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97de7b0ab/2c0969c1e1774e19a453a766521513d6 [2019-09-09 21:19:56,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:19:56,944 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:19:56,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:19:56,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:19:56,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:19:56,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:19:56" (1/1) ... [2019-09-09 21:19:56,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4037b39f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:56, skipping insertion in model container [2019-09-09 21:19:56,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:19:56" (1/1) ... [2019-09-09 21:19:56,963 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:19:57,083 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:19:58,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:19:58,253 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:19:58,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:19:58,698 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:19:58,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:58 WrapperNode [2019-09-09 21:19:58,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:19:58,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:19:58,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:19:58,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:19:58,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:58" (1/1) ... [2019-09-09 21:19:58,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:58" (1/1) ... [2019-09-09 21:19:58,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:58" (1/1) ... [2019-09-09 21:19:58,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:58" (1/1) ... [2019-09-09 21:19:58,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:58" (1/1) ... [2019-09-09 21:19:58,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:58" (1/1) ... [2019-09-09 21:19:58,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:58" (1/1) ... [2019-09-09 21:19:58,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:19:58,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:19:58,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:19:58,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:19:58,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:58" (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 21:19:59,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:19:59,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:19:59,071 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:19:59,071 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:19:59,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:19:59,072 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:19:59,072 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:19:59,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:19:59,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:19:59,073 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:19:59,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:19:59,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:19:59,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:20:02,988 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:20:02,989 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:20:02,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:20:02 BoogieIcfgContainer [2019-09-09 21:20:02,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:20:03,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:20:03,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:20:03,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:20:03,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:19:56" (1/3) ... [2019-09-09 21:20:03,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b389ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:20:03, skipping insertion in model container [2019-09-09 21:20:03,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:58" (2/3) ... [2019-09-09 21:20:03,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b389ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:20:03, skipping insertion in model container [2019-09-09 21:20:03,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:20:02" (3/3) ... [2019-09-09 21:20:03,011 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label31.c [2019-09-09 21:20:03,023 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:20:03,035 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:20:03,053 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:20:03,083 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:20:03,083 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:20:03,084 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:20:03,084 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:20:03,084 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:20:03,084 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:20:03,084 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:20:03,084 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:20:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:20:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-09 21:20:03,140 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:20:03,141 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 21:20:03,143 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:20:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:20:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash -46686471, now seen corresponding path program 1 times [2019-09-09 21:20:03,151 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:20:03,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:20:03,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:20:03,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:20:03,189 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:20:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:20:03,340 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 21:20:03,342 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:20:03,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:20:03,343 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:20:03,348 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:20:03,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:20:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:20:03,365 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:20:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:20:09,530 INFO L93 Difference]: Finished difference Result 1517 states and 2104 transitions. [2019-09-09 21:20:09,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:20:09,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-09-09 21:20:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:20:09,568 INFO L225 Difference]: With dead ends: 1517 [2019-09-09 21:20:09,568 INFO L226 Difference]: Without dead ends: 1432 [2019-09-09 21:20:09,570 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 21:20:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2019-09-09 21:20:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 977. [2019-09-09 21:20:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2019-09-09 21:20:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1461 transitions. [2019-09-09 21:20:09,679 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1461 transitions. Word has length 14 [2019-09-09 21:20:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:20:09,680 INFO L475 AbstractCegarLoop]: Abstraction has 977 states and 1461 transitions. [2019-09-09 21:20:09,680 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:20:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1461 transitions. [2019-09-09 21:20:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-09 21:20:09,684 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:20:09,685 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 21:20:09,685 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:20:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:20:09,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1839741392, now seen corresponding path program 1 times [2019-09-09 21:20:09,686 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:20:09,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:20:09,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:20:09,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:20:09,687 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:20:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:20:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:20:09,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:20:09,968 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:20:09,969 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 89 with the following transitions: [2019-09-09 21:20:09,971 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [730], [732], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:20:10,031 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:20:10,032 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:20:13,552 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 21:20:15,050 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:20:15,053 INFO L272 AbstractInterpreter]: Visited 81 different actions 157 times. Merged at 4 different actions 5 times. Never widened. Performed 374 root evaluator evaluations with a maximum evaluation depth of 15. Performed 374 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 21:20:15,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:20:15,058 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:20:16,860 INFO L227 lantSequenceWeakener]: Weakened 85 states. On average, predicates are now at 74.56% of their original sizes. [2019-09-09 21:20:16,861 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:20:16,953 INFO L420 sIntCurrentIteration]: We unified 87 AI predicates to 87 [2019-09-09 21:20:16,954 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:20:16,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:20:16,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 21:20:16,955 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:20:16,956 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 21:20:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 21:20:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 21:20:16,960 INFO L87 Difference]: Start difference. First operand 977 states and 1461 transitions. Second operand 11 states.