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_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 15:07:47,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 15:07:47,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 15:07:47,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 15:07:47,995 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 15:07:48,010 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 15:07:48,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 15:07:48,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 15:07:48,010 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 15:07:48,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 15:07:48,011 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 15:07:48,012 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 15:07:48,012 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 15:07:48,012 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 15:07:48,012 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 15:07:48,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 15:07:48,013 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 15:07:48,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 15:07:48,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 15:07:48,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 15:07:48,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 15:07:48,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 15:07:48,014 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 15:07:48,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 15:07:48,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 15:07:48,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 15:07:48,015 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 15:07:48,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 15:07:48,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:07:48,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 15:07:48,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 15:07:48,016 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 15:07:48,016 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 15:07:48,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 15:07:48,017 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 15:07:48,045 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 15:07:48,061 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 15:07:48,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 15:07:48,066 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 15:07:48,066 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 15:07:48,067 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label16.c [2019-09-09 15:07:48,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3b1bdc4/1170cf86121a4c308001fd91bd434e27/FLAG5200fe479 [2019-09-09 15:07:48,869 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 15:07:48,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label16.c [2019-09-09 15:07:48,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3b1bdc4/1170cf86121a4c308001fd91bd434e27/FLAG5200fe479 [2019-09-09 15:07:48,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3b1bdc4/1170cf86121a4c308001fd91bd434e27 [2019-09-09 15:07:48,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 15:07:48,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 15:07:49,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 15:07:49,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 15:07:49,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 15:07:49,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:07:48" (1/1) ... [2019-09-09 15:07:49,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@724f12c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:07:49, skipping insertion in model container [2019-09-09 15:07:49,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:07:48" (1/1) ... [2019-09-09 15:07:49,020 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 15:07:49,093 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 15:07:49,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:07:49,848 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 15:07:50,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:07:50,243 INFO L192 MainTranslator]: Completed translation [2019-09-09 15:07:50,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:07:50 WrapperNode [2019-09-09 15:07:50,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 15:07:50,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 15:07:50,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 15:07:50,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 15:07:50,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:07:50" (1/1) ... [2019-09-09 15:07:50,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:07:50" (1/1) ... [2019-09-09 15:07:50,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:07:50" (1/1) ... [2019-09-09 15:07:50,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:07:50" (1/1) ... [2019-09-09 15:07:50,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:07:50" (1/1) ... [2019-09-09 15:07:50,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:07:50" (1/1) ... [2019-09-09 15:07:50,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:07:50" (1/1) ... [2019-09-09 15:07:50,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 15:07:50,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 15:07:50,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 15:07:50,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 15:07:50,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:07:50" (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 15:07:50,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 15:07:50,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 15:07:50,486 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 15:07:50,486 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 15:07:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 15:07:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 15:07:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 15:07:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 15:07:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 15:07:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 15:07:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 15:07:52,157 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 15:07:52,158 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 15:07:52,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:07:52 BoogieIcfgContainer [2019-09-09 15:07:52,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 15:07:52,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 15:07:52,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 15:07:52,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 15:07:52,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 03:07:48" (1/3) ... [2019-09-09 15:07:52,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b255ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:07:52, skipping insertion in model container [2019-09-09 15:07:52,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:07:50" (2/3) ... [2019-09-09 15:07:52,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b255ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:07:52, skipping insertion in model container [2019-09-09 15:07:52,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:07:52" (3/3) ... [2019-09-09 15:07:52,168 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label16.c [2019-09-09 15:07:52,179 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 15:07:52,188 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 15:07:52,207 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 15:07:52,235 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 15:07:52,236 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 15:07:52,236 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 15:07:52,236 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 15:07:52,236 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 15:07:52,237 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 15:07:52,237 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 15:07:52,237 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 15:07:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-09-09 15:07:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-09 15:07:52,274 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:07:52,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:07:52,278 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:07:52,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:07:52,283 INFO L82 PathProgramCache]: Analyzing trace with hash -467621694, now seen corresponding path program 1 times [2019-09-09 15:07:52,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:07:52,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:07:52,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:07:52,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:07:52,331 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:07:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:07:52,720 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 15:07:52,725 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:07:52,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 15:07:52,725 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:07:52,730 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 15:07:52,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 15:07:52,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 15:07:52,746 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-09-09 15:07:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:07:54,906 INFO L93 Difference]: Finished difference Result 695 states and 994 transitions. [2019-09-09 15:07:54,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 15:07:54,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2019-09-09 15:07:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:07:54,932 INFO L225 Difference]: With dead ends: 695 [2019-09-09 15:07:54,932 INFO L226 Difference]: Without dead ends: 622 [2019-09-09 15:07:54,935 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 15:07:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-09-09 15:07:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-09-09 15:07:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-09-09 15:07:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-09-09 15:07:55,029 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 49 [2019-09-09 15:07:55,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:07:55,030 INFO L475 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-09-09 15:07:55,030 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 15:07:55,030 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-09-09 15:07:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-09-09 15:07:55,037 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:07:55,037 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, 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] [2019-09-09 15:07:55,038 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:07:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:07:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2099265230, now seen corresponding path program 1 times [2019-09-09 15:07:55,038 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:07:55,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:07:55,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:07:55,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:07:55,040 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:07:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:07:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:07:55,321 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:07:55,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:07:55,321 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:07:55,323 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:07:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:07:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:07:55,324 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-09-09 15:07:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:07:57,052 INFO L93 Difference]: Finished difference Result 1221 states and 1621 transitions. [2019-09-09 15:07:57,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 15:07:57,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-09-09 15:07:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:07:57,063 INFO L225 Difference]: With dead ends: 1221 [2019-09-09 15:07:57,063 INFO L226 Difference]: Without dead ends: 1221 [2019-09-09 15:07:57,067 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 15:07:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-09-09 15:07:57,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-09-09 15:07:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-09-09 15:07:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-09-09 15:07:57,160 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 129 [2019-09-09 15:07:57,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:07:57,160 INFO L475 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-09-09 15:07:57,161 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:07:57,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-09-09 15:07:57,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-09-09 15:07:57,171 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:07:57,172 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, 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] [2019-09-09 15:07:57,172 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:07:57,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:07:57,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2045537286, now seen corresponding path program 1 times [2019-09-09 15:07:57,173 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:07:57,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:07:57,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:07:57,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:07:57,175 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:07:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:07:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:07:57,355 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:07:57,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 15:07:57,355 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:07:57,356 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 15:07:57,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 15:07:57,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 15:07:57,357 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 4 states. [2019-09-09 15:07:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:07:59,344 INFO L93 Difference]: Finished difference Result 3135 states and 4163 transitions. [2019-09-09 15:07:59,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 15:07:59,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2019-09-09 15:07:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:07:59,365 INFO L225 Difference]: With dead ends: 3135 [2019-09-09 15:07:59,365 INFO L226 Difference]: Without dead ends: 3135 [2019-09-09 15:07:59,366 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 15:07:59,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2019-09-09 15:07:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 2927. [2019-09-09 15:07:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2927 states. [2019-09-09 15:07:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 3836 transitions. [2019-09-09 15:07:59,471 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 3836 transitions. Word has length 180 [2019-09-09 15:07:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:07:59,472 INFO L475 AbstractCegarLoop]: Abstraction has 2927 states and 3836 transitions. [2019-09-09 15:07:59,472 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 15:07:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 3836 transitions. [2019-09-09 15:07:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-09-09 15:07:59,484 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:07:59,485 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:59,485 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:07:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:07:59,486 INFO L82 PathProgramCache]: Analyzing trace with hash 817562012, now seen corresponding path program 1 times [2019-09-09 15:07:59,486 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:07:59,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:07:59,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:07:59,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:07:59,487 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:07:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:07:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 84 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 15:07:59,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 15:07:59,689 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 15:07:59,690 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 224 with the following transitions: [2019-09-09 15:07:59,692 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [301], [303], [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], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [618], [623], [625], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-09-09 15:07:59,741 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 15:07:59,741 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 15:10:03,848 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 15:10:03,851 INFO L272 AbstractInterpreter]: Visited 105 different actions 105 times. Never merged. Never widened. Performed 259 root evaluator evaluations with a maximum evaluation depth of 17. Performed 259 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 28 variables. [2019-09-09 15:10:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:10:03,855 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 15:12:05,168 INFO L227 lantSequenceWeakener]: Weakened 202 states. On average, predicates are now at 73.78% of their original sizes. [2019-09-09 15:12:05,168 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 15:12:05,253 INFO L420 sIntCurrentIteration]: We unified 222 AI predicates to 222 [2019-09-09 15:12:05,253 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 15:12:05,254 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 15:12:05,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 15:12:05,254 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:12:05,255 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 15:12:05,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 15:12:05,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 15:12:05,256 INFO L87 Difference]: Start difference. First operand 2927 states and 3836 transitions. Second operand 10 states.