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/Problem11_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 15:25:59,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 15:25:59,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 15:25:59,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 15:25:59,859 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 15:25:59,874 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 15:25:59,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 15:25:59,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 15:25:59,874 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 15:25:59,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 15:25:59,875 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 15:25:59,875 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 15:25:59,876 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 15:25:59,876 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 15:25:59,876 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 15:25:59,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 15:25:59,877 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 15:25:59,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 15:25:59,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 15:25:59,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 15:25:59,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 15:25:59,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 15:25:59,878 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 15:25:59,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 15:25:59,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 15:25:59,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 15:25:59,879 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 15:25:59,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 15:25:59,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:25:59,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 15:25:59,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 15:25:59,880 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 15:25:59,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 15:25:59,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 15:25:59,881 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 15:25:59,908 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 15:25:59,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 15:25:59,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 15:25:59,927 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 15:25:59,927 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 15:25:59,928 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label36.c [2019-09-09 15:25:59,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ea5cbef/ade264e6830945d1a92e0e4f4e5a5e03/FLAGd50b1fbcc [2019-09-09 15:26:00,507 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 15:26:00,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label36.c [2019-09-09 15:26:00,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ea5cbef/ade264e6830945d1a92e0e4f4e5a5e03/FLAGd50b1fbcc [2019-09-09 15:26:00,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ea5cbef/ade264e6830945d1a92e0e4f4e5a5e03 [2019-09-09 15:26:00,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 15:26:00,737 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 15:26:00,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 15:26:00,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 15:26:00,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 15:26:00,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:26:00" (1/1) ... [2019-09-09 15:26:00,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16572f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:26:00, skipping insertion in model container [2019-09-09 15:26:00,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:26:00" (1/1) ... [2019-09-09 15:26:00,756 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 15:26:00,815 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 15:26:01,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:26:01,472 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 15:26:01,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:26:01,660 INFO L192 MainTranslator]: Completed translation [2019-09-09 15:26:01,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:26:01 WrapperNode [2019-09-09 15:26:01,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 15:26:01,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 15:26:01,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 15:26:01,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 15:26:01,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:26:01" (1/1) ... [2019-09-09 15:26:01,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:26:01" (1/1) ... [2019-09-09 15:26:01,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:26:01" (1/1) ... [2019-09-09 15:26:01,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:26:01" (1/1) ... [2019-09-09 15:26:01,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:26:01" (1/1) ... [2019-09-09 15:26:01,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:26:01" (1/1) ... [2019-09-09 15:26:01,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:26:01" (1/1) ... [2019-09-09 15:26:01,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 15:26:01,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 15:26:01,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 15:26:01,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 15:26:01,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:26:01" (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 15:26:01,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 15:26:01,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 15:26:01,919 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 15:26:01,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 15:26:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 15:26:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 15:26:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 15:26:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 15:26:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 15:26:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 15:26:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 15:26:03,935 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 15:26:03,935 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 15:26:03,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:26:03 BoogieIcfgContainer [2019-09-09 15:26:03,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 15:26:03,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 15:26:03,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 15:26:03,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 15:26:03,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 03:26:00" (1/3) ... [2019-09-09 15:26:03,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52624ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:26:03, skipping insertion in model container [2019-09-09 15:26:03,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:26:01" (2/3) ... [2019-09-09 15:26:03,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52624ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:26:03, skipping insertion in model container [2019-09-09 15:26:03,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:26:03" (3/3) ... [2019-09-09 15:26:03,945 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label36.c [2019-09-09 15:26:03,955 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 15:26:03,967 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 15:26:03,985 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 15:26:04,017 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 15:26:04,019 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 15:26:04,019 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 15:26:04,019 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 15:26:04,019 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 15:26:04,019 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 15:26:04,020 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 15:26:04,020 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 15:26:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-09-09 15:26:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-09 15:26:04,075 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:26:04,076 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:26:04,078 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:26:04,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:26:04,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1754233962, now seen corresponding path program 1 times [2019-09-09 15:26:04,086 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:26:04,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:26:04,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:26:04,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:26:04,131 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:26:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:26:04,365 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 15:26:04,367 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:26:04,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 15:26:04,368 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:26:04,375 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 15:26:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 15:26:04,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 15:26:04,393 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-09-09 15:26:05,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:26:05,876 INFO L93 Difference]: Finished difference Result 493 states and 799 transitions. [2019-09-09 15:26:05,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 15:26:05,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-09-09 15:26:05,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:26:05,902 INFO L225 Difference]: With dead ends: 493 [2019-09-09 15:26:05,903 INFO L226 Difference]: Without dead ends: 425 [2019-09-09 15:26:05,904 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 15:26:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-09-09 15:26:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-09-09 15:26:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-09-09 15:26:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-09-09 15:26:06,012 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 19 [2019-09-09 15:26:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:26:06,013 INFO L475 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-09-09 15:26:06,013 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 15:26:06,013 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-09-09 15:26:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-09 15:26:06,021 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:26:06,022 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 15:26:06,022 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:26:06,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:26:06,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2108634866, now seen corresponding path program 1 times [2019-09-09 15:26:06,025 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:26:06,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:26:06,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:26:06,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:26:06,027 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:26:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:26:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:26:06,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:26:06,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 15:26:06,273 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:26:06,276 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 15:26:06,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 15:26:06,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 15:26:06,277 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 4 states. [2019-09-09 15:26:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:26:08,033 INFO L93 Difference]: Finished difference Result 1181 states and 1861 transitions. [2019-09-09 15:26:08,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 15:26:08,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2019-09-09 15:26:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:26:08,045 INFO L225 Difference]: With dead ends: 1181 [2019-09-09 15:26:08,045 INFO L226 Difference]: Without dead ends: 1181 [2019-09-09 15:26:08,046 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 15:26:08,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2019-09-09 15:26:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 799. [2019-09-09 15:26:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2019-09-09 15:26:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1259 transitions. [2019-09-09 15:26:08,116 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1259 transitions. Word has length 93 [2019-09-09 15:26:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:26:08,118 INFO L475 AbstractCegarLoop]: Abstraction has 799 states and 1259 transitions. [2019-09-09 15:26:08,119 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 15:26:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1259 transitions. [2019-09-09 15:26:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-09 15:26:08,126 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:26:08,126 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 15:26:08,127 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:26:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:26:08,127 INFO L82 PathProgramCache]: Analyzing trace with hash -625871230, now seen corresponding path program 1 times [2019-09-09 15:26:08,127 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:26:08,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:26:08,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:26:08,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:26:08,130 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:26:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:26:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:26:08,338 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:26:08,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:26:08,339 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:26:08,340 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:26:08,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:26:08,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:26:08,341 INFO L87 Difference]: Start difference. First operand 799 states and 1259 transitions. Second operand 6 states. [2019-09-09 15:26:10,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:26:10,056 INFO L93 Difference]: Finished difference Result 1417 states and 2096 transitions. [2019-09-09 15:26:10,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-09 15:26:10,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2019-09-09 15:26:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:26:10,070 INFO L225 Difference]: With dead ends: 1417 [2019-09-09 15:26:10,070 INFO L226 Difference]: Without dead ends: 1417 [2019-09-09 15:26:10,071 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-09 15:26:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2019-09-09 15:26:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1204. [2019-09-09 15:26:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2019-09-09 15:26:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1796 transitions. [2019-09-09 15:26:10,143 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1796 transitions. Word has length 103 [2019-09-09 15:26:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:26:10,153 INFO L475 AbstractCegarLoop]: Abstraction has 1204 states and 1796 transitions. [2019-09-09 15:26:10,153 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:26:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1796 transitions. [2019-09-09 15:26:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-09 15:26:10,161 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:26:10,162 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 15:26:10,163 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:26:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:26:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash -79682620, now seen corresponding path program 1 times [2019-09-09 15:26:10,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:26:10,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:26:10,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:26:10,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:26:10,165 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:26:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:26:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:26:10,354 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:26:10,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:26:10,355 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:26:10,356 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:26:10,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:26:10,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:26:10,357 INFO L87 Difference]: Start difference. First operand 1204 states and 1796 transitions. Second operand 6 states. [2019-09-09 15:26:12,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:26:12,196 INFO L93 Difference]: Finished difference Result 2451 states and 3529 transitions. [2019-09-09 15:26:12,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 15:26:12,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2019-09-09 15:26:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:26:12,213 INFO L225 Difference]: With dead ends: 2451 [2019-09-09 15:26:12,213 INFO L226 Difference]: Without dead ends: 2451 [2019-09-09 15:26:12,214 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 15:26:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2019-09-09 15:26:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1627. [2019-09-09 15:26:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1627 states. [2019-09-09 15:26:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 2349 transitions. [2019-09-09 15:26:12,284 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 2349 transitions. Word has length 121 [2019-09-09 15:26:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:26:12,285 INFO L475 AbstractCegarLoop]: Abstraction has 1627 states and 2349 transitions. [2019-09-09 15:26:12,285 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:26:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 2349 transitions. [2019-09-09 15:26:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-09-09 15:26:12,289 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:26:12,289 INFO L399 BasicCegarLoop]: trace histogram [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, 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 15:26:12,290 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:26:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:26:12,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1401869634, now seen corresponding path program 1 times [2019-09-09 15:26:12,290 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:26:12,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:26:12,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:26:12,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:26:12,292 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:26:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:26:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 15:26:12,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 15:26:12,428 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 15:26:12,429 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 176 with the following transitions: [2019-09-09 15:26:12,432 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [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], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-09-09 15:26:12,508 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 15:26:12,508 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 15:27:18,479 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 15:27:18,481 INFO L272 AbstractInterpreter]: Visited 89 different actions 89 times. Never merged. Never widened. Performed 227 root evaluator evaluations with a maximum evaluation depth of 17. Performed 227 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 28 variables. [2019-09-09 15:27:18,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:27:18,485 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 15:28:28,924 INFO L227 lantSequenceWeakener]: Weakened 156 states. On average, predicates are now at 73.25% of their original sizes. [2019-09-09 15:28:28,925 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 15:28:29,006 INFO L420 sIntCurrentIteration]: We unified 174 AI predicates to 174 [2019-09-09 15:28:29,007 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 15:28:29,007 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 15:28:29,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 15:28:29,008 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:28:29,008 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 15:28:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 15:28:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 15:28:29,010 INFO L87 Difference]: Start difference. First operand 1627 states and 2349 transitions. Second operand 10 states.