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_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:45,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:45,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:45,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:02:45,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:45,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:45,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:45,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:45,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:45,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:45,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:45,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:45,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:45,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:45,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:45,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:45,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:45,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:45,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:45,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:45,193 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 [2019-10-15 00:02:45,207 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:45,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:45,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:45,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:45,209 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:45,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:45,210 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:45,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:45,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:45,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:45,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:45,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:45,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:45,211 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:45,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:45,211 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:45,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:45,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:45,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:45,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:45,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:45,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:45,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:45,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:45,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:45,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:45,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:45,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:45,214 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 [2019-10-15 00:02:45,478 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:45,490 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:45,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:45,495 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:45,495 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:45,496 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-10-15 00:02:45,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d235fbbf2/5ef08f65021c4e3ab419cdb4c70fc2a5/FLAG932af475f [2019-10-15 00:02:46,183 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:46,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-10-15 00:02:46,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d235fbbf2/5ef08f65021c4e3ab419cdb4c70fc2a5/FLAG932af475f [2019-10-15 00:02:46,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d235fbbf2/5ef08f65021c4e3ab419cdb4c70fc2a5 [2019-10-15 00:02:46,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:46,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:46,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:46,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:46,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:46,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:46" (1/1) ... [2019-10-15 00:02:46,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f58af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:46, skipping insertion in model container [2019-10-15 00:02:46,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:46" (1/1) ... [2019-10-15 00:02:46,434 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:46,501 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:47,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:47,357 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:47,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:47,527 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:47,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:47 WrapperNode [2019-10-15 00:02:47,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:47,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:47,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:47,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:47,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:47" (1/1) ... [2019-10-15 00:02:47,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:47" (1/1) ... [2019-10-15 00:02:47,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:47" (1/1) ... [2019-10-15 00:02:47,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:47" (1/1) ... [2019-10-15 00:02:47,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:47" (1/1) ... [2019-10-15 00:02:47,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:47" (1/1) ... [2019-10-15 00:02:47,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:47" (1/1) ... [2019-10-15 00:02:47,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:47,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:47,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:47,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:47,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:47" (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 [2019-10-15 00:02:47,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:47,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:47,776 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:47,776 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:47,776 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:47,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:47,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:47,777 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:47,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:47,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:49,642 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:49,643 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:49,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:49 BoogieIcfgContainer [2019-10-15 00:02:49,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:49,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:49,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:49,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:49,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:46" (1/3) ... [2019-10-15 00:02:49,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b09f87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:49, skipping insertion in model container [2019-10-15 00:02:49,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:47" (2/3) ... [2019-10-15 00:02:49,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b09f87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:49, skipping insertion in model container [2019-10-15 00:02:49,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:49" (3/3) ... [2019-10-15 00:02:49,654 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label09.c [2019-10-15 00:02:49,664 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:49,674 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:49,687 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:49,716 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:49,717 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:49,717 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:49,717 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:49,717 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:49,717 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:49,718 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:49,718 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:49,746 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:02:49,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-15 00:02:49,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:49,759 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:49,761 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:49,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:49,767 INFO L82 PathProgramCache]: Analyzing trace with hash -869319573, now seen corresponding path program 1 times [2019-10-15 00:02:49,777 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:49,778 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283873984] [2019-10-15 00:02:49,778 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:49,778 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:49,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:50,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283873984] [2019-10-15 00:02:50,300 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:50,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:50,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597320919] [2019-10-15 00:02:50,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:50,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:50,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:50,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:50,326 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:02:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:52,835 INFO L93 Difference]: Finished difference Result 981 states and 1757 transitions. [2019-10-15 00:02:52,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:52,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-10-15 00:02:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:52,859 INFO L225 Difference]: With dead ends: 981 [2019-10-15 00:02:52,860 INFO L226 Difference]: Without dead ends: 622 [2019-10-15 00:02:52,874 INFO L600 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 [2019-10-15 00:02:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-15 00:02:52,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-15 00:02:52,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-15 00:02:52,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-10-15 00:02:52,969 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 72 [2019-10-15 00:02:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:52,970 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-10-15 00:02:52,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-10-15 00:02:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 00:02:52,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:52,981 INFO L380 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, 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] [2019-10-15 00:02:52,981 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:52,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1437675110, now seen corresponding path program 1 times [2019-10-15 00:02:52,982 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:52,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714534159] [2019-10-15 00:02:52,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:52,983 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:52,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:53,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714534159] [2019-10-15 00:02:53,267 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:53,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:53,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129596316] [2019-10-15 00:02:53,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:53,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:53,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:53,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:53,274 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-10-15 00:02:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:55,391 INFO L93 Difference]: Finished difference Result 1837 states and 2643 transitions. [2019-10-15 00:02:55,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:55,393 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-10-15 00:02:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:55,403 INFO L225 Difference]: With dead ends: 1837 [2019-10-15 00:02:55,403 INFO L226 Difference]: Without dead ends: 1221 [2019-10-15 00:02:55,406 INFO L600 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 [2019-10-15 00:02:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-10-15 00:02:55,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-10-15 00:02:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-10-15 00:02:55,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-10-15 00:02:55,474 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 152 [2019-10-15 00:02:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:55,475 INFO L462 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-10-15 00:02:55,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-10-15 00:02:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-15 00:02:55,489 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:55,490 INFO L380 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, 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] [2019-10-15 00:02:55,490 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:55,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1147537460, now seen corresponding path program 1 times [2019-10-15 00:02:55,491 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:55,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860759780] [2019-10-15 00:02:55,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:55,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:55,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 60 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:55,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860759780] [2019-10-15 00:02:55,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104051008] [2019-10-15 00:02:55,875 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 [2019-10-15 00:02:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:55,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:55,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:56,131 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:56,244 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:02:56,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-10-15 00:02:56,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116989254] [2019-10-15 00:02:56,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:56,304 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:56,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:56,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:02:56,305 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 4 states. [2019-10-15 00:02:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:58,326 INFO L93 Difference]: Finished difference Result 4530 states and 6248 transitions. [2019-10-15 00:02:58,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:58,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 203 [2019-10-15 00:02:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:58,363 INFO L225 Difference]: With dead ends: 4530 [2019-10-15 00:02:58,363 INFO L226 Difference]: Without dead ends: 3326 [2019-10-15 00:02:58,369 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:02:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2019-10-15 00:02:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2739. [2019-10-15 00:02:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2019-10-15 00:02:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3736 transitions. [2019-10-15 00:02:58,503 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3736 transitions. Word has length 203 [2019-10-15 00:02:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:58,505 INFO L462 AbstractCegarLoop]: Abstraction has 2739 states and 3736 transitions. [2019-10-15 00:02:58,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3736 transitions. [2019-10-15 00:02:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-10-15 00:02:58,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:58,525 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:58,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:58,734 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:58,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:58,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1992228476, now seen corresponding path program 1 times [2019-10-15 00:02:58,734 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:58,735 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505977759] [2019-10-15 00:02:58,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:58,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:58,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 7 proven. 129 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-15 00:02:59,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505977759] [2019-10-15 00:02:59,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506080201] [2019-10-15 00:02:59,125 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 [2019-10-15 00:02:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:59,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 00:02:59,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:59,417 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:59,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:59,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:02:59,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:02:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:59,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [696301542] [2019-10-15 00:02:59,889 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 285 [2019-10-15 00:02:59,958 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:59,959 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)