/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/Problem10_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:43:41,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:43:41,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:43:41,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:43:41,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:43:41,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:43:41,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:43:41,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:43:41,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:43:41,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:43:41,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:43:41,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:43:41,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:43:41,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:43:41,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:43:41,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:43:41,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:43:41,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:43:41,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:43:41,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:43:41,563 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 22:43:41,590 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:43:41,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:43:41,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:43:41,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:43:41,593 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:43:41,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:43:41,593 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:43:41,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:43:41,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:43:41,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:43:41,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:43:41,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:43:41,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:43:41,596 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:43:41,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:43:41,596 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:43:41,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:43:41,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:43:41,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:43:41,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:43:41,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:43:41,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:43:41,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:43:41,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:43:41,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:43:41,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:43:41,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:43:41,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:43:41,598 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 22:43:41,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:43:41,907 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:43:41,911 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:43:41,912 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:43:41,912 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:43:41,913 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label39.c [2019-11-06 22:43:41,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/990afbca8/aee249c477d442669bf9457dc4607f14/FLAG5d2124ca3 [2019-11-06 22:43:42,526 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:43:42,530 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label39.c [2019-11-06 22:43:42,540 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/990afbca8/aee249c477d442669bf9457dc4607f14/FLAG5d2124ca3 [2019-11-06 22:43:42,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/990afbca8/aee249c477d442669bf9457dc4607f14 [2019-11-06 22:43:42,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:43:42,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:43:42,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:43:42,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:43:42,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:43:42,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:42" (1/1) ... [2019-11-06 22:43:42,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473fe89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:42, skipping insertion in model container [2019-11-06 22:43:42,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:42" (1/1) ... [2019-11-06 22:43:42,879 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:43:42,941 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:43:43,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:43:43,456 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:43:43,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:43:43,581 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:43:43,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:43 WrapperNode [2019-11-06 22:43:43,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:43:43,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:43:43,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:43:43,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:43:43,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:43" (1/1) ... [2019-11-06 22:43:43,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:43" (1/1) ... [2019-11-06 22:43:43,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:43" (1/1) ... [2019-11-06 22:43:43,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:43" (1/1) ... [2019-11-06 22:43:43,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:43" (1/1) ... [2019-11-06 22:43:43,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:43" (1/1) ... [2019-11-06 22:43:43,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:43" (1/1) ... [2019-11-06 22:43:43,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:43:43,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:43:43,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:43:43,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:43:43,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:43" (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 22:43:43,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:43:43,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:43:43,757 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:43:43,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:43:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:43:43,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:43:43,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:43:43,758 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:43:43,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:43:43,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:43:43,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:43:45,096 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:43:45,097 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:43:45,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:45 BoogieIcfgContainer [2019-11-06 22:43:45,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:43:45,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:43:45,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:43:45,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:43:45,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:43:42" (1/3) ... [2019-11-06 22:43:45,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da98a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:45, skipping insertion in model container [2019-11-06 22:43:45,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:43" (2/3) ... [2019-11-06 22:43:45,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da98a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:45, skipping insertion in model container [2019-11-06 22:43:45,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:45" (3/3) ... [2019-11-06 22:43:45,107 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label39.c [2019-11-06 22:43:45,117 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:43:45,125 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:43:45,137 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:43:45,165 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:43:45,165 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:43:45,165 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:43:45,166 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:43:45,168 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:43:45,168 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:43:45,168 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:43:45,168 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:43:45,203 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:43:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:43:45,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:45,212 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] [2019-11-06 22:43:45,214 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:45,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1917412719, now seen corresponding path program 1 times [2019-11-06 22:43:45,230 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:45,230 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64657496] [2019-11-06 22:43:45,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:45,552 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 22:43:45,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64657496] [2019-11-06 22:43:45,553 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:43:45,553 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:43:45,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587391043] [2019-11-06 22:43:45,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:43:45,562 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:45,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:43:45,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:43:45,580 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-11-06 22:43:47,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:47,145 INFO L93 Difference]: Finished difference Result 733 states and 1294 transitions. [2019-11-06 22:43:47,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:43:47,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-06 22:43:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:47,167 INFO L225 Difference]: With dead ends: 733 [2019-11-06 22:43:47,167 INFO L226 Difference]: Without dead ends: 437 [2019-11-06 22:43:47,176 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 22:43:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-11-06 22:43:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-11-06 22:43:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:43:47,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-11-06 22:43:47,272 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 32 [2019-11-06 22:43:47,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:47,273 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-11-06 22:43:47,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:43:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-11-06 22:43:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 22:43:47,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:47,284 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:47,284 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:47,285 INFO L82 PathProgramCache]: Analyzing trace with hash 845536850, now seen corresponding path program 1 times [2019-11-06 22:43:47,285 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:47,286 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760243445] [2019-11-06 22:43:47,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:47,602 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760243445] [2019-11-06 22:43:47,602 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039821321] [2019-11-06 22:43:47,602 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 22:43:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:47,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:43:47,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:43:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:47,755 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:43:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:47,818 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:43:47,818 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-06 22:43:47,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347693401] [2019-11-06 22:43:47,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:43:47,821 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:43:47,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:43:47,822 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 4 states. [2019-11-06 22:43:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:48,903 INFO L93 Difference]: Finished difference Result 1154 states and 1795 transitions. [2019-11-06 22:43:48,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:43:48,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2019-11-06 22:43:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:48,917 INFO L225 Difference]: With dead ends: 1154 [2019-11-06 22:43:48,917 INFO L226 Difference]: Without dead ends: 866 [2019-11-06 22:43:48,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:43:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-11-06 22:43:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2019-11-06 22:43:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2019-11-06 22:43:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1235 transitions. [2019-11-06 22:43:48,972 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1235 transitions. Word has length 102 [2019-11-06 22:43:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:48,973 INFO L462 AbstractCegarLoop]: Abstraction has 866 states and 1235 transitions. [2019-11-06 22:43:48,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:43:48,974 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1235 transitions. [2019-11-06 22:43:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-06 22:43:48,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:48,977 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:49,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:43:49,183 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1094831721, now seen corresponding path program 1 times [2019-11-06 22:43:49,186 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:49,186 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91174599] [2019-11-06 22:43:49,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:49,372 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91174599] [2019-11-06 22:43:49,372 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:43:49,372 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:43:49,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900909152] [2019-11-06 22:43:49,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:43:49,379 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:49,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:43:49,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:43:49,380 INFO L87 Difference]: Start difference. First operand 866 states and 1235 transitions. Second operand 6 states. [2019-11-06 22:43:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:50,342 INFO L93 Difference]: Finished difference Result 1766 states and 2578 transitions. [2019-11-06 22:43:50,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:43:50,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2019-11-06 22:43:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:50,351 INFO L225 Difference]: With dead ends: 1766 [2019-11-06 22:43:50,351 INFO L226 Difference]: Without dead ends: 906 [2019-11-06 22:43:50,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:43:50,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-11-06 22:43:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 886. [2019-11-06 22:43:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2019-11-06 22:43:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1211 transitions. [2019-11-06 22:43:50,403 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1211 transitions. Word has length 113 [2019-11-06 22:43:50,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:50,404 INFO L462 AbstractCegarLoop]: Abstraction has 886 states and 1211 transitions. [2019-11-06 22:43:50,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:43:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1211 transitions. [2019-11-06 22:43:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-06 22:43:50,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:50,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:50,410 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:50,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:50,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1618424411, now seen corresponding path program 1 times [2019-11-06 22:43:50,414 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:50,414 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577474778] [2019-11-06 22:43:50,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:50,601 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577474778] [2019-11-06 22:43:50,602 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:43:50,602 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:43:50,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218346216] [2019-11-06 22:43:50,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:43:50,604 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:50,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:43:50,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:43:50,605 INFO L87 Difference]: Start difference. First operand 886 states and 1211 transitions. Second operand 6 states. [2019-11-06 22:43:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:51,490 INFO L93 Difference]: Finished difference Result 2394 states and 3478 transitions. [2019-11-06 22:43:51,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:43:51,491 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2019-11-06 22:43:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:51,502 INFO L225 Difference]: With dead ends: 2394 [2019-11-06 22:43:51,502 INFO L226 Difference]: Without dead ends: 1514 [2019-11-06 22:43:51,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:43:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2019-11-06 22:43:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1482. [2019-11-06 22:43:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1482 states. [2019-11-06 22:43:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2029 transitions. [2019-11-06 22:43:51,583 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2029 transitions. Word has length 163 [2019-11-06 22:43:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:51,583 INFO L462 AbstractCegarLoop]: Abstraction has 1482 states and 2029 transitions. [2019-11-06 22:43:51,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:43:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2029 transitions. [2019-11-06 22:43:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-06 22:43:51,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:51,588 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:43:51,588 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:51,589 INFO L82 PathProgramCache]: Analyzing trace with hash 38952791, now seen corresponding path program 1 times [2019-11-06 22:43:51,589 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:51,589 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353815364] [2019-11-06 22:43:51,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 50 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:43:51,769 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353815364] [2019-11-06 22:43:51,769 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344041809] [2019-11-06 22:43:51,770 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 22:43:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:51,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:43:51,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:43:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-06 22:43:51,988 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:43:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 50 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:43:52,126 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:43:52,127 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-11-06 22:43:52,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190087636] [2019-11-06 22:43:52,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:43:52,129 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:43:52,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:43:52,131 INFO L87 Difference]: Start difference. First operand 1482 states and 2029 transitions. Second operand 5 states. [2019-11-06 22:43:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:53,214 INFO L93 Difference]: Finished difference Result 4019 states and 5739 transitions. [2019-11-06 22:43:53,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:43:53,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2019-11-06 22:43:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:53,231 INFO L225 Difference]: With dead ends: 4019 [2019-11-06 22:43:53,231 INFO L226 Difference]: Without dead ends: 2543 [2019-11-06 22:43:53,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:43:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2019-11-06 22:43:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2509. [2019-11-06 22:43:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2509 states. [2019-11-06 22:43:53,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3402 transitions. [2019-11-06 22:43:53,323 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3402 transitions. Word has length 182 [2019-11-06 22:43:53,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:53,324 INFO L462 AbstractCegarLoop]: Abstraction has 2509 states and 3402 transitions. [2019-11-06 22:43:53,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:43:53,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3402 transitions. [2019-11-06 22:43:53,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-11-06 22:43:53,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:53,329 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, 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] [2019-11-06 22:43:53,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:43:53,533 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:53,534 INFO L82 PathProgramCache]: Analyzing trace with hash 383631829, now seen corresponding path program 1 times [2019-11-06 22:43:53,534 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:53,534 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399881990] [2019-11-06 22:43:53,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-06 22:43:53,688 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399881990] [2019-11-06 22:43:53,688 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855659433] [2019-11-06 22:43:53,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:43:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:53,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:43:53,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:43:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 22:43:53,878 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:43:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 22:43:53,925 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:43:53,926 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-11-06 22:43:53,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991759381] [2019-11-06 22:43:53,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:43:53,927 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:53,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:43:53,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:43:53,928 INFO L87 Difference]: Start difference. First operand 2509 states and 3402 transitions. Second operand 3 states. [2019-11-06 22:43:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:54,516 INFO L93 Difference]: Finished difference Result 3389 states and 4615 transitions. [2019-11-06 22:43:54,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:43:54,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2019-11-06 22:43:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:54,535 INFO L225 Difference]: With dead ends: 3389 [2019-11-06 22:43:54,535 INFO L226 Difference]: Without dead ends: 3387 [2019-11-06 22:43:54,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 379 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:43:54,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3387 states. [2019-11-06 22:43:54,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3387 to 2658. [2019-11-06 22:43:54,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2658 states. [2019-11-06 22:43:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3584 transitions. [2019-11-06 22:43:54,623 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3584 transitions. Word has length 188 [2019-11-06 22:43:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:54,624 INFO L462 AbstractCegarLoop]: Abstraction has 2658 states and 3584 transitions. [2019-11-06 22:43:54,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:43:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3584 transitions. [2019-11-06 22:43:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-11-06 22:43:54,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:54,634 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:54,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:43:54,838 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:54,839 INFO L82 PathProgramCache]: Analyzing trace with hash -2117945153, now seen corresponding path program 1 times [2019-11-06 22:43:54,839 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:54,839 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138768996] [2019-11-06 22:43:54,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 149 proven. 72 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:43:55,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138768996] [2019-11-06 22:43:55,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009616042] [2019-11-06 22:43:55,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:43:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:55,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:43:55,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:43:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 270 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-06 22:43:55,617 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:43:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 149 proven. 72 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:43:55,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1077649935] [2019-11-06 22:43:55,765 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 310 [2019-11-06 22:43:55,818 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:43:55,818 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:44:07,459 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.