/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/Problem03_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:38:17,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:38:17,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:38:17,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:38:17,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:38:17,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:38:17,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:38:17,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:38:17,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:38:17,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:38:17,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:38:17,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:38:17,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:38:17,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:38:17,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:38:17,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:38:17,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:38:17,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:38:17,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:38:17,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:38:17,357 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 22:38:17,391 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:38:17,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:38:17,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:38:17,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:38:17,393 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:38:17,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:38:17,394 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:38:17,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:38:17,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:38:17,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:38:17,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:38:17,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:38:17,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:38:17,399 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:38:17,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:38:17,399 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:38:17,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:38:17,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:38:17,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:38:17,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:38:17,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:38:17,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:38:17,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:38:17,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:38:17,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:38:17,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:38:17,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:38:17,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:38:17,403 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 22:38:17,700 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:38:17,718 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:38:17,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:38:17,723 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:38:17,724 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:38:17,724 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label32.c [2019-11-06 22:38:17,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47fd49e2f/0c13c5c48e1a4b1689c14f80134986ba/FLAGd8da50cd7 [2019-11-06 22:38:18,442 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:38:18,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label32.c [2019-11-06 22:38:18,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47fd49e2f/0c13c5c48e1a4b1689c14f80134986ba/FLAGd8da50cd7 [2019-11-06 22:38:18,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47fd49e2f/0c13c5c48e1a4b1689c14f80134986ba [2019-11-06 22:38:18,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:38:18,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:38:18,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:38:18,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:38:18,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:38:18,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:18" (1/1) ... [2019-11-06 22:38:18,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba9d4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:18, skipping insertion in model container [2019-11-06 22:38:18,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:18" (1/1) ... [2019-11-06 22:38:18,699 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:38:18,784 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:38:19,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:38:19,553 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:38:19,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:38:19,833 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:38:19,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:19 WrapperNode [2019-11-06 22:38:19,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:38:19,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:38:19,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:38:19,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:38:19,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:19" (1/1) ... [2019-11-06 22:38:19,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:19" (1/1) ... [2019-11-06 22:38:19,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:19" (1/1) ... [2019-11-06 22:38:19,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:19" (1/1) ... [2019-11-06 22:38:19,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:19" (1/1) ... [2019-11-06 22:38:20,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:19" (1/1) ... [2019-11-06 22:38:20,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:19" (1/1) ... [2019-11-06 22:38:20,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:38:20,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:38:20,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:38:20,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:38:20,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:19" (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 22:38:20,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:38:20,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:38:20,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:38:20,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:38:20,095 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:38:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:38:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:38:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:38:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:38:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:38:20,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:38:22,015 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:38:22,015 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:38:22,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:22 BoogieIcfgContainer [2019-11-06 22:38:22,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:38:22,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:38:22,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:38:22,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:38:22,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:38:18" (1/3) ... [2019-11-06 22:38:22,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b09f204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:22, skipping insertion in model container [2019-11-06 22:38:22,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:19" (2/3) ... [2019-11-06 22:38:22,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b09f204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:22, skipping insertion in model container [2019-11-06 22:38:22,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:22" (3/3) ... [2019-11-06 22:38:22,026 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label32.c [2019-11-06 22:38:22,036 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:38:22,046 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:38:22,062 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:38:22,097 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:38:22,097 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:38:22,097 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:38:22,097 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:38:22,098 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:38:22,158 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:38:22,159 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:38:22,159 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:38:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 22:38:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-06 22:38:22,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:22,239 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:22,244 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash -846647824, now seen corresponding path program 1 times [2019-11-06 22:38:22,267 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:22,268 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638659874] [2019-11-06 22:38:22,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:23,127 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 22:38:23,128 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638659874] [2019-11-06 22:38:23,129 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:23,129 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:38:23,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873243967] [2019-11-06 22:38:23,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:23,137 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:23,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:23,154 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-11-06 22:38:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:24,435 INFO L93 Difference]: Finished difference Result 842 states and 1484 transitions. [2019-11-06 22:38:24,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:24,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 195 [2019-11-06 22:38:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:24,458 INFO L225 Difference]: With dead ends: 842 [2019-11-06 22:38:24,458 INFO L226 Difference]: Without dead ends: 469 [2019-11-06 22:38:24,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2019-11-06 22:38:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 468. [2019-11-06 22:38:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2019-11-06 22:38:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 718 transitions. [2019-11-06 22:38:24,556 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 718 transitions. Word has length 195 [2019-11-06 22:38:24,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:24,557 INFO L462 AbstractCegarLoop]: Abstraction has 468 states and 718 transitions. [2019-11-06 22:38:24,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:24,557 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 718 transitions. [2019-11-06 22:38:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-11-06 22:38:24,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:24,563 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:24,564 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:24,564 INFO L82 PathProgramCache]: Analyzing trace with hash 175357299, now seen corresponding path program 1 times [2019-11-06 22:38:24,564 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:24,565 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9748724] [2019-11-06 22:38:24,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:24,758 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9748724] [2019-11-06 22:38:24,759 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:24,759 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:38:24,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487565404] [2019-11-06 22:38:24,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:38:24,763 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:24,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:38:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:38:24,763 INFO L87 Difference]: Start difference. First operand 468 states and 718 transitions. Second operand 6 states. [2019-11-06 22:38:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:26,554 INFO L93 Difference]: Finished difference Result 1409 states and 2231 transitions. [2019-11-06 22:38:26,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:38:26,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 204 [2019-11-06 22:38:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:26,564 INFO L225 Difference]: With dead ends: 1409 [2019-11-06 22:38:26,565 INFO L226 Difference]: Without dead ends: 947 [2019-11-06 22:38:26,567 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 22:38:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2019-11-06 22:38:26,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 910. [2019-11-06 22:38:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2019-11-06 22:38:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1387 transitions. [2019-11-06 22:38:26,630 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1387 transitions. Word has length 204 [2019-11-06 22:38:26,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:26,630 INFO L462 AbstractCegarLoop]: Abstraction has 910 states and 1387 transitions. [2019-11-06 22:38:26,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:38:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1387 transitions. [2019-11-06 22:38:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-06 22:38:26,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:26,637 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:26,637 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:26,638 INFO L82 PathProgramCache]: Analyzing trace with hash 94250244, now seen corresponding path program 1 times [2019-11-06 22:38:26,638 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:26,638 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560398571] [2019-11-06 22:38:26,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:27,048 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560398571] [2019-11-06 22:38:27,049 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:27,050 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:38:27,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164671518] [2019-11-06 22:38:27,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:27,053 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:27,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:27,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:27,054 INFO L87 Difference]: Start difference. First operand 910 states and 1387 transitions. Second operand 3 states. [2019-11-06 22:38:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:28,229 INFO L93 Difference]: Finished difference Result 2674 states and 4169 transitions. [2019-11-06 22:38:28,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:28,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2019-11-06 22:38:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:28,241 INFO L225 Difference]: With dead ends: 2674 [2019-11-06 22:38:28,241 INFO L226 Difference]: Without dead ends: 1770 [2019-11-06 22:38:28,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2019-11-06 22:38:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1748. [2019-11-06 22:38:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1748 states. [2019-11-06 22:38:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2648 transitions. [2019-11-06 22:38:28,322 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2648 transitions. Word has length 207 [2019-11-06 22:38:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:28,332 INFO L462 AbstractCegarLoop]: Abstraction has 1748 states and 2648 transitions. [2019-11-06 22:38:28,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2648 transitions. [2019-11-06 22:38:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-06 22:38:28,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:28,340 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:28,341 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:28,342 INFO L82 PathProgramCache]: Analyzing trace with hash 640358255, now seen corresponding path program 1 times [2019-11-06 22:38:28,342 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:28,342 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333452158] [2019-11-06 22:38:28,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:28,504 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333452158] [2019-11-06 22:38:28,504 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164407482] [2019-11-06 22:38:28,504 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 22:38:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:28,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:38:28,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:28,914 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:29,019 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:38:29,019 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:38:29,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945114325] [2019-11-06 22:38:29,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:29,021 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:29,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:29,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:29,021 INFO L87 Difference]: Start difference. First operand 1748 states and 2648 transitions. Second operand 3 states. [2019-11-06 22:38:30,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:30,120 INFO L93 Difference]: Finished difference Result 5176 states and 8064 transitions. [2019-11-06 22:38:30,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:30,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2019-11-06 22:38:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:30,147 INFO L225 Difference]: With dead ends: 5176 [2019-11-06 22:38:30,147 INFO L226 Difference]: Without dead ends: 3434 [2019-11-06 22:38:30,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2019-11-06 22:38:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3429. [2019-11-06 22:38:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3429 states. [2019-11-06 22:38:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 5066 transitions. [2019-11-06 22:38:30,285 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 5066 transitions. Word has length 224 [2019-11-06 22:38:30,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:30,286 INFO L462 AbstractCegarLoop]: Abstraction has 3429 states and 5066 transitions. [2019-11-06 22:38:30,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:30,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 5066 transitions. [2019-11-06 22:38:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-11-06 22:38:30,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:30,304 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:30,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:30,513 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:30,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:30,513 INFO L82 PathProgramCache]: Analyzing trace with hash 442727854, now seen corresponding path program 1 times [2019-11-06 22:38:30,514 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:30,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841487681] [2019-11-06 22:38:30,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:30,719 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841487681] [2019-11-06 22:38:30,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791123571] [2019-11-06 22:38:30,720 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 22:38:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:30,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:38:30,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:31,161 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:31,246 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:38:31,246 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:38:31,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485970033] [2019-11-06 22:38:31,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:31,248 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:31,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:31,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:31,248 INFO L87 Difference]: Start difference. First operand 3429 states and 5066 transitions. Second operand 3 states. [2019-11-06 22:38:32,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:32,353 INFO L93 Difference]: Finished difference Result 10009 states and 15198 transitions. [2019-11-06 22:38:32,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:32,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 231 [2019-11-06 22:38:32,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:32,396 INFO L225 Difference]: With dead ends: 10009 [2019-11-06 22:38:32,397 INFO L226 Difference]: Without dead ends: 6586 [2019-11-06 22:38:32,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 460 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2019-11-06 22:38:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 6561. [2019-11-06 22:38:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6561 states. [2019-11-06 22:38:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6561 states to 6561 states and 9885 transitions. [2019-11-06 22:38:32,592 INFO L78 Accepts]: Start accepts. Automaton has 6561 states and 9885 transitions. Word has length 231 [2019-11-06 22:38:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:32,593 INFO L462 AbstractCegarLoop]: Abstraction has 6561 states and 9885 transitions. [2019-11-06 22:38:32,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 6561 states and 9885 transitions. [2019-11-06 22:38:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-11-06 22:38:32,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:32,615 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:32,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:32,820 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash 112893857, now seen corresponding path program 1 times [2019-11-06 22:38:32,821 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:32,822 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606914738] [2019-11-06 22:38:32,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:33,062 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606914738] [2019-11-06 22:38:33,062 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947691517] [2019-11-06 22:38:33,062 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 22:38:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:33,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:38:33,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:33,690 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:33,792 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:38:33,792 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:38:33,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061826576] [2019-11-06 22:38:33,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:33,795 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:33,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:33,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:33,795 INFO L87 Difference]: Start difference. First operand 6561 states and 9885 transitions. Second operand 3 states. [2019-11-06 22:38:34,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:34,839 INFO L93 Difference]: Finished difference Result 18738 states and 28867 transitions. [2019-11-06 22:38:34,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:34,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 250 [2019-11-06 22:38:34,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:34,924 INFO L225 Difference]: With dead ends: 18738 [2019-11-06 22:38:34,924 INFO L226 Difference]: Without dead ends: 12183 [2019-11-06 22:38:34,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 498 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:34,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12183 states. [2019-11-06 22:38:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12183 to 12180. [2019-11-06 22:38:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12180 states. [2019-11-06 22:38:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12180 states to 12180 states and 16926 transitions. [2019-11-06 22:38:35,396 INFO L78 Accepts]: Start accepts. Automaton has 12180 states and 16926 transitions. Word has length 250 [2019-11-06 22:38:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:35,397 INFO L462 AbstractCegarLoop]: Abstraction has 12180 states and 16926 transitions. [2019-11-06 22:38:35,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 12180 states and 16926 transitions. [2019-11-06 22:38:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-11-06 22:38:35,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:35,445 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:35,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:35,658 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash 938767275, now seen corresponding path program 1 times [2019-11-06 22:38:35,660 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:35,661 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130364523] [2019-11-06 22:38:35,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 100 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:38:35,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130364523] [2019-11-06 22:38:35,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458290349] [2019-11-06 22:38:35,940 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 22:38:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:36,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:38:36,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 22:38:36,360 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 22:38:36,816 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:38:36,816 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2019-11-06 22:38:36,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437861975] [2019-11-06 22:38:36,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:38:36,819 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:36,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:38:36,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:38:36,820 INFO L87 Difference]: Start difference. First operand 12180 states and 16926 transitions. Second operand 7 states. [2019-11-06 22:38:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:37,500 INFO L93 Difference]: Finished difference Result 36829 states and 53729 transitions. [2019-11-06 22:38:37,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:38:37,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 292 [2019-11-06 22:38:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:37,627 INFO L225 Difference]: With dead ends: 36829 [2019-11-06 22:38:37,627 INFO L226 Difference]: Without dead ends: 24655 [2019-11-06 22:38:37,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 574 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:38:37,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24655 states. [2019-11-06 22:38:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24655 to 24421. [2019-11-06 22:38:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24421 states. [2019-11-06 22:38:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24421 states to 24421 states and 34410 transitions. [2019-11-06 22:38:38,479 INFO L78 Accepts]: Start accepts. Automaton has 24421 states and 34410 transitions. Word has length 292 [2019-11-06 22:38:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:38,479 INFO L462 AbstractCegarLoop]: Abstraction has 24421 states and 34410 transitions. [2019-11-06 22:38:38,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:38:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 24421 states and 34410 transitions. [2019-11-06 22:38:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2019-11-06 22:38:38,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:38,564 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:38,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:38,769 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:38,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1601607134, now seen corresponding path program 1 times [2019-11-06 22:38:38,770 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:38,770 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055517847] [2019-11-06 22:38:38,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 89 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:39,297 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055517847] [2019-11-06 22:38:39,297 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229641454] [2019-11-06 22:38:39,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:39,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:38:39,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:40,380 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:40,486 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:38:40,486 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-11-06 22:38:40,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613091417] [2019-11-06 22:38:40,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:40,488 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:40,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:40,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:38:40,489 INFO L87 Difference]: Start difference. First operand 24421 states and 34410 transitions. Second operand 3 states. [2019-11-06 22:38:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:41,796 INFO L93 Difference]: Finished difference Result 59893 states and 87486 transitions. [2019-11-06 22:38:41,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:41,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 295 [2019-11-06 22:38:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:41,938 INFO L225 Difference]: With dead ends: 59893 [2019-11-06 22:38:41,938 INFO L226 Difference]: Without dead ends: 35478 [2019-11-06 22:38:42,015 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 590 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:38:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35478 states. [2019-11-06 22:38:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35478 to 35472. [2019-11-06 22:38:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35472 states. [2019-11-06 22:38:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35472 states to 35472 states and 51512 transitions. [2019-11-06 22:38:42,912 INFO L78 Accepts]: Start accepts. Automaton has 35472 states and 51512 transitions. Word has length 295 [2019-11-06 22:38:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:42,913 INFO L462 AbstractCegarLoop]: Abstraction has 35472 states and 51512 transitions. [2019-11-06 22:38:42,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 35472 states and 51512 transitions. [2019-11-06 22:38:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2019-11-06 22:38:43,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:43,065 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, 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, 1, 1, 1, 1, 1, 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 22:38:43,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:43,269 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:43,270 INFO L82 PathProgramCache]: Analyzing trace with hash 470800667, now seen corresponding path program 1 times [2019-11-06 22:38:43,270 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:43,271 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684575379] [2019-11-06 22:38:43,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:43,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684575379] [2019-11-06 22:38:43,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167485388] [2019-11-06 22:38:43,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:43,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:38:43,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:44,021 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:44,178 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [59107037] [2019-11-06 22:38:44,185 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 338 [2019-11-06 22:38:44,260 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:38:44,261 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)