/usr/bin/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:45:01,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:45:01,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:45:01,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:45:01,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:45:02,002 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:45:02,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:45:02,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:45:02,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:45:02,004 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:45:02,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:45:02,005 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:45:02,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:45:02,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:45:02,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:45:02,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:45:02,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:45:02,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:45:02,006 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:45:02,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:45:02,007 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:45:02,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:45:02,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:45:02,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:45:02,007 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:45:02,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:45:02,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:45:02,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:45:02,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:45:02,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:45:02,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:45:02,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:45:02,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:45:02,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:45:02,284 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:45:02,296 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:45:02,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:45:02,301 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:45:02,302 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:45:02,302 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label03.c [2019-11-06 22:45:02,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2157b5ea7/273864ce624e4eabab4df3909affb712/FLAG2a913486f [2019-11-06 22:45:02,975 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:45:02,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label03.c [2019-11-06 22:45:02,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2157b5ea7/273864ce624e4eabab4df3909affb712/FLAG2a913486f [2019-11-06 22:45:03,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2157b5ea7/273864ce624e4eabab4df3909affb712 [2019-11-06 22:45:03,191 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:45:03,192 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:45:03,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:03,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:45:03,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:45:03,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:03" (1/1) ... [2019-11-06 22:45:03,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1882f447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:03, skipping insertion in model container [2019-11-06 22:45:03,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:03" (1/1) ... [2019-11-06 22:45:03,206 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:45:03,260 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:45:04,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:04,047 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:45:04,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:04,231 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:45:04,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:04 WrapperNode [2019-11-06 22:45:04,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:04,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:45:04,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:45:04,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:45:04,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:04" (1/1) ... [2019-11-06 22:45:04,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:04" (1/1) ... [2019-11-06 22:45:04,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:04" (1/1) ... [2019-11-06 22:45:04,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:04" (1/1) ... [2019-11-06 22:45:04,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:04" (1/1) ... [2019-11-06 22:45:04,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:04" (1/1) ... [2019-11-06 22:45:04,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:04" (1/1) ... [2019-11-06 22:45:04,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:45:04,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:45:04,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:45:04,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:45:04,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:04" (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 [2019-11-06 22:45:04,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:45:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:45:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:45:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:45:04,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:45:04,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:45:04,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:45:04,477 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:45:04,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:45:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:45:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:45:06,238 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:45:06,238 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:45:06,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:06 BoogieIcfgContainer [2019-11-06 22:45:06,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:45:06,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:45:06,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:45:06,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:45:06,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:03" (1/3) ... [2019-11-06 22:45:06,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b42238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:06, skipping insertion in model container [2019-11-06 22:45:06,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:04" (2/3) ... [2019-11-06 22:45:06,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b42238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:06, skipping insertion in model container [2019-11-06 22:45:06,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:06" (3/3) ... [2019-11-06 22:45:06,253 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label03.c [2019-11-06 22:45:06,265 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:45:06,274 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:45:06,286 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:45:06,317 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:45:06,317 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:45:06,317 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:45:06,317 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:45:06,318 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:45:06,318 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:45:06,318 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:45:06,319 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:45:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:45:06,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 22:45:06,352 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:06,353 INFO L410 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] [2019-11-06 22:45:06,355 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:06,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1474349029, now seen corresponding path program 1 times [2019-11-06 22:45:06,370 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:06,371 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285240734] [2019-11-06 22:45:06,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:06,708 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285240734] [2019-11-06 22:45:06,709 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:06,710 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:45:06,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253385411] [2019-11-06 22:45:06,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:45:06,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:06,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:45:06,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:45:06,736 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:45:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:08,750 INFO L93 Difference]: Finished difference Result 981 states and 1757 transitions. [2019-11-06 22:45:08,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:45:08,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2019-11-06 22:45:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:08,772 INFO L225 Difference]: With dead ends: 981 [2019-11-06 22:45:08,772 INFO L226 Difference]: Without dead ends: 622 [2019-11-06 22:45:08,781 INFO L630 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 [2019-11-06 22:45:08,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-11-06 22:45:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-11-06 22:45:08,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-11-06 22:45:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-11-06 22:45:08,879 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 36 [2019-11-06 22:45:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:08,880 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-11-06 22:45:08,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:45:08,880 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-11-06 22:45:08,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 22:45:08,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:08,887 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:08,887 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash -465501430, now seen corresponding path program 1 times [2019-11-06 22:45:08,888 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:08,888 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169453858] [2019-11-06 22:45:08,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:09,154 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169453858] [2019-11-06 22:45:09,154 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:09,154 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:45:09,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559652739] [2019-11-06 22:45:09,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:45:09,157 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:09,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:45:09,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:45:09,158 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-11-06 22:45:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:10,975 INFO L93 Difference]: Finished difference Result 1839 states and 2644 transitions. [2019-11-06 22:45:10,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:45:10,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2019-11-06 22:45:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:10,985 INFO L225 Difference]: With dead ends: 1839 [2019-11-06 22:45:10,986 INFO L226 Difference]: Without dead ends: 1223 [2019-11-06 22:45:10,988 INFO L630 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 [2019-11-06 22:45:10,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2019-11-06 22:45:11,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1210. [2019-11-06 22:45:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-11-06 22:45:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1601 transitions. [2019-11-06 22:45:11,050 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1601 transitions. Word has length 116 [2019-11-06 22:45:11,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:11,051 INFO L462 AbstractCegarLoop]: Abstraction has 1210 states and 1601 transitions. [2019-11-06 22:45:11,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:45:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1601 transitions. [2019-11-06 22:45:11,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:45:11,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:11,056 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:11,056 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1153470222, now seen corresponding path program 1 times [2019-11-06 22:45:11,057 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:11,057 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805881262] [2019-11-06 22:45:11,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:11,229 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805881262] [2019-11-06 22:45:11,230 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:11,230 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:45:11,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983043623] [2019-11-06 22:45:11,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:45:11,233 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:45:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:45:11,234 INFO L87 Difference]: Start difference. First operand 1210 states and 1601 transitions. Second operand 4 states. [2019-11-06 22:45:13,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:13,039 INFO L93 Difference]: Finished difference Result 4528 states and 6206 transitions. [2019-11-06 22:45:13,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:45:13,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-11-06 22:45:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:13,059 INFO L225 Difference]: With dead ends: 4528 [2019-11-06 22:45:13,059 INFO L226 Difference]: Without dead ends: 3324 [2019-11-06 22:45:13,063 INFO L630 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 [2019-11-06 22:45:13,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2019-11-06 22:45:13,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 3303. [2019-11-06 22:45:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3303 states. [2019-11-06 22:45:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 4304 transitions. [2019-11-06 22:45:13,171 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 4304 transitions. Word has length 130 [2019-11-06 22:45:13,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:13,172 INFO L462 AbstractCegarLoop]: Abstraction has 3303 states and 4304 transitions. [2019-11-06 22:45:13,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:45:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 4304 transitions. [2019-11-06 22:45:13,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-06 22:45:13,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:13,179 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:45:13,179 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:13,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674653, now seen corresponding path program 1 times [2019-11-06 22:45:13,180 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:13,180 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610390137] [2019-11-06 22:45:13,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:45:13,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610390137] [2019-11-06 22:45:13,393 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:13,393 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:45:13,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875104683] [2019-11-06 22:45:13,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:45:13,395 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:13,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:45:13,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:45:13,396 INFO L87 Difference]: Start difference. First operand 3303 states and 4304 transitions. Second operand 3 states. [2019-11-06 22:45:14,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:14,484 INFO L93 Difference]: Finished difference Result 7934 states and 10720 transitions. [2019-11-06 22:45:14,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:45:14,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 232 [2019-11-06 22:45:14,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:14,522 INFO L225 Difference]: With dead ends: 7934 [2019-11-06 22:45:14,523 INFO L226 Difference]: Without dead ends: 4825 [2019-11-06 22:45:14,532 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:45:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2019-11-06 22:45:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4635. [2019-11-06 22:45:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4635 states. [2019-11-06 22:45:14,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 6137 transitions. [2019-11-06 22:45:14,659 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 6137 transitions. Word has length 232 [2019-11-06 22:45:14,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:14,660 INFO L462 AbstractCegarLoop]: Abstraction has 4635 states and 6137 transitions. [2019-11-06 22:45:14,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:45:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 6137 transitions. [2019-11-06 22:45:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2019-11-06 22:45:14,669 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:14,670 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:45:14,670 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:14,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:14,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1682198646, now seen corresponding path program 1 times [2019-11-06 22:45:14,671 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:14,671 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422688128] [2019-11-06 22:45:14,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 241 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:45:15,033 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422688128] [2019-11-06 22:45:15,033 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814118699] [2019-11-06 22:45:15,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:15,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:45:15,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:45:15,399 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:45:15,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [104170157] [2019-11-06 22:45:15,597 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 311 [2019-11-06 22:45:15,646 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:45:15,646 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)