/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_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:45:05,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:45:05,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:45:05,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:45:05,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:45:05,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:45:05,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:45:05,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:45:05,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:45:05,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:45:05,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:45:05,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:45:05,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:45:05,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:45:05,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:45:05,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:45:05,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:45:05,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:45:05,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:45:05,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:45:05,194 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 22:45:05,216 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:45:05,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:45:05,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:45:05,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:45:05,219 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:45:05,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:45:05,219 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:45:05,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:45:05,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:45:05,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:45:05,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:45:05,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:45:05,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:45:05,222 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:45:05,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:45:05,222 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:45:05,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:45:05,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:45:05,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:45:05,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:45:05,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:45:05,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:45:05,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:45:05,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:45:05,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:45:05,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:45:05,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:45:05,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:45:05,225 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 22:45:05,596 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:45:05,612 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:45:05,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:45:05,622 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:45:05,622 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:45:05,623 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label04.c [2019-11-06 22:45:05,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bd4dee7e/077df5f14d084720bdc7209906024238/FLAG461785248 [2019-11-06 22:45:06,266 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:45:06,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label04.c [2019-11-06 22:45:06,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bd4dee7e/077df5f14d084720bdc7209906024238/FLAG461785248 [2019-11-06 22:45:06,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bd4dee7e/077df5f14d084720bdc7209906024238 [2019-11-06 22:45:06,504 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:45:06,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:45:06,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:06,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:45:06,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:45:06,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:06" (1/1) ... [2019-11-06 22:45:06,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ab2ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:06, skipping insertion in model container [2019-11-06 22:45:06,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:06" (1/1) ... [2019-11-06 22:45:06,523 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:45:06,586 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:45:07,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:07,292 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:45:07,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:07,662 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:45:07,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:07 WrapperNode [2019-11-06 22:45:07,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:07,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:45:07,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:45:07,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:45:07,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:07" (1/1) ... [2019-11-06 22:45:07,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:07" (1/1) ... [2019-11-06 22:45:07,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:07" (1/1) ... [2019-11-06 22:45:07,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:07" (1/1) ... [2019-11-06 22:45:07,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:07" (1/1) ... [2019-11-06 22:45:07,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:07" (1/1) ... [2019-11-06 22:45:07,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:07" (1/1) ... [2019-11-06 22:45:07,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:45:07,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:45:07,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:45:07,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:45:07,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:07" (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 22:45:07,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:45:07,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:45:07,954 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:45:07,954 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:45:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:45:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:45:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:45:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:45:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:45:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:45:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:45:09,758 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:45:09,758 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:45:09,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:09 BoogieIcfgContainer [2019-11-06 22:45:09,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:45:09,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:45:09,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:45:09,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:45:09,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:06" (1/3) ... [2019-11-06 22:45:09,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b83404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:09, skipping insertion in model container [2019-11-06 22:45:09,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:07" (2/3) ... [2019-11-06 22:45:09,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b83404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:09, skipping insertion in model container [2019-11-06 22:45:09,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:09" (3/3) ... [2019-11-06 22:45:09,777 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label04.c [2019-11-06 22:45:09,789 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:45:09,800 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:45:09,812 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:45:09,852 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:45:09,852 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:45:09,854 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:45:09,854 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:45:09,854 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:45:09,855 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:45:09,855 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:45:09,855 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:45:09,893 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:45:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 22:45:09,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:09,906 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, 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 22:45:09,908 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:09,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1796892554, now seen corresponding path program 1 times [2019-11-06 22:45:09,925 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:09,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264192461] [2019-11-06 22:45:09,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:10,370 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 22:45:10,371 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264192461] [2019-11-06 22:45:10,372 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:10,372 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:45:10,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483746361] [2019-11-06 22:45:10,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:45:10,381 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:45:10,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:45:10,400 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:45:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:12,607 INFO L93 Difference]: Finished difference Result 981 states and 1757 transitions. [2019-11-06 22:45:12,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:45:12,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2019-11-06 22:45:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:12,631 INFO L225 Difference]: With dead ends: 981 [2019-11-06 22:45:12,632 INFO L226 Difference]: Without dead ends: 622 [2019-11-06 22:45:12,641 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 22:45:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-11-06 22:45:12,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-11-06 22:45:12,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-11-06 22:45:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-11-06 22:45:12,732 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 59 [2019-11-06 22:45:12,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:12,732 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-11-06 22:45:12,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:45:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-11-06 22:45:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-06 22:45:12,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:12,740 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, 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] [2019-11-06 22:45:12,740 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:12,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:12,741 INFO L82 PathProgramCache]: Analyzing trace with hash -676009126, now seen corresponding path program 1 times [2019-11-06 22:45:12,741 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:12,741 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288371164] [2019-11-06 22:45:12,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:13,010 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288371164] [2019-11-06 22:45:13,010 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:13,010 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:45:13,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387004558] [2019-11-06 22:45:13,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:45:13,017 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:13,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:45:13,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:45:13,018 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-11-06 22:45:14,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:14,949 INFO L93 Difference]: Finished difference Result 1837 states and 2643 transitions. [2019-11-06 22:45:14,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:45:14,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-11-06 22:45:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:14,958 INFO L225 Difference]: With dead ends: 1837 [2019-11-06 22:45:14,959 INFO L226 Difference]: Without dead ends: 1221 [2019-11-06 22:45:14,961 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 22:45:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-11-06 22:45:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-11-06 22:45:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-11-06 22:45:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-11-06 22:45:15,012 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 139 [2019-11-06 22:45:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:15,015 INFO L462 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-11-06 22:45:15,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:45:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-11-06 22:45:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-06 22:45:15,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:15,029 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, 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] [2019-11-06 22:45:15,029 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:15,030 INFO L82 PathProgramCache]: Analyzing trace with hash 828635490, now seen corresponding path program 1 times [2019-11-06 22:45:15,030 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:15,030 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084392019] [2019-11-06 22:45:15,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:15,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084392019] [2019-11-06 22:45:15,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813910272] [2019-11-06 22:45:15,317 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 22:45:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:15,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:45:15,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:15,578 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:15,649 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:45:15,649 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-11-06 22:45:15,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371119467] [2019-11-06 22:45:15,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:45:15,658 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:15,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:45:15,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:45:15,659 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 4 states. [2019-11-06 22:45:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:17,462 INFO L93 Difference]: Finished difference Result 4530 states and 6248 transitions. [2019-11-06 22:45:17,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:45:17,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 190 [2019-11-06 22:45:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:17,482 INFO L225 Difference]: With dead ends: 4530 [2019-11-06 22:45:17,483 INFO L226 Difference]: Without dead ends: 3326 [2019-11-06 22:45:17,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:45:17,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2019-11-06 22:45:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2739. [2019-11-06 22:45:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2019-11-06 22:45:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3736 transitions. [2019-11-06 22:45:17,583 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3736 transitions. Word has length 190 [2019-11-06 22:45:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:17,584 INFO L462 AbstractCegarLoop]: Abstraction has 2739 states and 3736 transitions. [2019-11-06 22:45:17,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:45:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3736 transitions. [2019-11-06 22:45:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-11-06 22:45:17,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:17,598 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:45:17,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:17,803 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:17,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1068121551, now seen corresponding path program 1 times [2019-11-06 22:45:17,804 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:17,805 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779748472] [2019-11-06 22:45:17,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 7 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 22:45:18,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779748472] [2019-11-06 22:45:18,157 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604844007] [2019-11-06 22:45:18,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:18,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:45:18,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:18,404 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:18,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:45:18,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:45:18,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:45:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:18,750 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [57063267] [2019-11-06 22:45:18,755 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 272 [2019-11-06 22:45:18,801 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:45:18,801 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)