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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:16,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:16,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:16,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:16,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:16,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:16,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:16,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:16,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:16,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:16,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:16,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:16,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:16,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:16,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:16,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:16,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:16,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:16,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:16,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:16,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:16,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:16,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:16,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:16,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:04:16,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:04:16,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:04:16,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:04:16,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:04:16,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:04:16,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:04:16,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:04:16,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:04:16,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:16,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:16,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:16,422 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:04:16,436 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:16,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:16,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:16,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:16,438 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:16,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:16,438 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:16,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:16,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:16,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:16,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:16,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:16,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:16,440 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:16,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:16,440 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:16,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:16,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:16,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:16,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:16,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:16,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:16,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:16,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:16,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:16,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:16,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:16,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:16,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:16,732 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:16,745 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:16,749 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:16,750 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:16,751 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:16,752 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label25.c [2019-10-14 22:04:16,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/382160fe7/10298c9269db464f893b08cf37e88f2d/FLAG0c53d575b [2019-10-14 22:04:17,535 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:17,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label25.c [2019-10-14 22:04:17,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/382160fe7/10298c9269db464f893b08cf37e88f2d/FLAG0c53d575b [2019-10-14 22:04:17,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/382160fe7/10298c9269db464f893b08cf37e88f2d [2019-10-14 22:04:17,649 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:17,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:17,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:17,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:17,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:17,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:17" (1/1) ... [2019-10-14 22:04:17,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f417be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:17, skipping insertion in model container [2019-10-14 22:04:17,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:17" (1/1) ... [2019-10-14 22:04:17,668 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:17,753 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:04:18,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:18,640 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:04:18,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:19,010 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:04:19,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19 WrapperNode [2019-10-14 22:04:19,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:19,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:04:19,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:04:19,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:04:19,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:04:19,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:04:19,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:04:19,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:04:19,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (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 [2019-10-14 22:04:19,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:19,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:19,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:19,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:19,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:19,284 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:19,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:19,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:19,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:21,734 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:21,735 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:21,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:21 BoogieIcfgContainer [2019-10-14 22:04:21,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:21,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:21,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:21,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:21,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:17" (1/3) ... [2019-10-14 22:04:21,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73af898a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:21, skipping insertion in model container [2019-10-14 22:04:21,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (2/3) ... [2019-10-14 22:04:21,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73af898a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:21, skipping insertion in model container [2019-10-14 22:04:21,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:21" (3/3) ... [2019-10-14 22:04:21,759 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label25.c [2019-10-14 22:04:21,770 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:21,782 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:21,794 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:21,834 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:21,834 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:21,835 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:21,835 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:21,835 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:21,835 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:21,835 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:21,835 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:21,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 22:04:21,870 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:21,871 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:21,873 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:21,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:21,880 INFO L82 PathProgramCache]: Analyzing trace with hash 134360965, now seen corresponding path program 1 times [2019-10-14 22:04:21,889 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:21,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741034565] [2019-10-14 22:04:21,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:21,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:21,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:22,303 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741034565] [2019-10-14 22:04:22,304 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:22,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:22,305 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935784710] [2019-10-14 22:04:22,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:22,311 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:22,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:22,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:22,329 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:27,589 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-14 22:04:27,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:27,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2019-10-14 22:04:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:27,619 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:04:27,619 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:27,634 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-10-14 22:04:27,752 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 56 [2019-10-14 22:04:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:27,753 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-10-14 22:04:27,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-10-14 22:04:27,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-10-14 22:04:27,767 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:27,768 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2019-10-14 22:04:27,769 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:27,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1586256827, now seen corresponding path program 1 times [2019-10-14 22:04:27,769 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:27,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901243010] [2019-10-14 22:04:27,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:27,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:27,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:28,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901243010] [2019-10-14 22:04:28,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037531499] [2019-10-14 22:04:28,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:28,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-14 22:04:28,670 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:28,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-14 22:04:28,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684781436] [2019-10-14 22:04:28,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:28,678 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:28,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:28,679 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-10-14 22:04:31,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:31,943 INFO L93 Difference]: Finished difference Result 3129 states and 5063 transitions. [2019-10-14 22:04:31,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:04:31,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 238 [2019-10-14 22:04:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:31,960 INFO L225 Difference]: With dead ends: 3129 [2019-10-14 22:04:31,961 INFO L226 Difference]: Without dead ends: 2104 [2019-10-14 22:04:31,965 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2019-10-14 22:04:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2083. [2019-10-14 22:04:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-10-14 22:04:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3187 transitions. [2019-10-14 22:04:32,050 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3187 transitions. Word has length 238 [2019-10-14 22:04:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:32,051 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3187 transitions. [2019-10-14 22:04:32,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3187 transitions. [2019-10-14 22:04:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-14 22:04:32,062 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:32,063 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:32,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:32,268 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:32,269 INFO L82 PathProgramCache]: Analyzing trace with hash -714713860, now seen corresponding path program 1 times [2019-10-14 22:04:32,269 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:32,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110556041] [2019-10-14 22:04:32,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:32,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:32,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 98 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:32,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110556041] [2019-10-14 22:04:32,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664579739] [2019-10-14 22:04:32,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:32,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-14 22:04:33,016 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:33,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:33,017 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324608446] [2019-10-14 22:04:33,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:33,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:33,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:33,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:33,020 INFO L87 Difference]: Start difference. First operand 2083 states and 3187 transitions. Second operand 5 states. [2019-10-14 22:04:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:35,827 INFO L93 Difference]: Finished difference Result 6311 states and 9954 transitions. [2019-10-14 22:04:35,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:04:35,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 273 [2019-10-14 22:04:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:35,853 INFO L225 Difference]: With dead ends: 6311 [2019-10-14 22:04:35,854 INFO L226 Difference]: Without dead ends: 4234 [2019-10-14 22:04:35,860 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:04:35,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-10-14 22:04:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-10-14 22:04:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-10-14 22:04:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5791 transitions. [2019-10-14 22:04:35,988 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5791 transitions. Word has length 273 [2019-10-14 22:04:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:35,989 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5791 transitions. [2019-10-14 22:04:35,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5791 transitions. [2019-10-14 22:04:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-10-14 22:04:35,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:35,995 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:36,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:36,208 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:36,209 INFO L82 PathProgramCache]: Analyzing trace with hash -628993500, now seen corresponding path program 1 times [2019-10-14 22:04:36,210 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:36,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621831675] [2019-10-14 22:04:36,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:36,211 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:36,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 22:04:36,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621831675] [2019-10-14 22:04:36,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336924321] [2019-10-14 22:04:36,654 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 [2019-10-14 22:04:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:36,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:36,898 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:36,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 22:04:36,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883362145] [2019-10-14 22:04:36,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:04:36,900 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:04:36,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:36,901 INFO L87 Difference]: Start difference. First operand 4198 states and 5791 transitions. Second operand 12 states. [2019-10-14 22:04:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:43,881 INFO L93 Difference]: Finished difference Result 13272 states and 19292 transitions. [2019-10-14 22:04:43,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 22:04:43,882 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 285 [2019-10-14 22:04:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:43,922 INFO L225 Difference]: With dead ends: 13272 [2019-10-14 22:04:43,922 INFO L226 Difference]: Without dead ends: 7642 [2019-10-14 22:04:43,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 293 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:04:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-10-14 22:04:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 5899. [2019-10-14 22:04:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5899 states. [2019-10-14 22:04:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5899 states to 5899 states and 6784 transitions. [2019-10-14 22:04:44,106 INFO L78 Accepts]: Start accepts. Automaton has 5899 states and 6784 transitions. Word has length 285 [2019-10-14 22:04:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:44,107 INFO L462 AbstractCegarLoop]: Abstraction has 5899 states and 6784 transitions. [2019-10-14 22:04:44,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:04:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5899 states and 6784 transitions. [2019-10-14 22:04:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2019-10-14 22:04:44,123 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:44,124 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:44,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:44,329 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:44,329 INFO L82 PathProgramCache]: Analyzing trace with hash 797362899, now seen corresponding path program 1 times [2019-10-14 22:04:44,329 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:44,330 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489291397] [2019-10-14 22:04:44,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:44,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:44,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 196 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-10-14 22:04:45,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489291397] [2019-10-14 22:04:45,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969167978] [2019-10-14 22:04:45,185 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 [2019-10-14 22:04:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:45,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2019-10-14 22:04:45,554 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:45,554 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:45,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989963350] [2019-10-14 22:04:45,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:45,555 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:45,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:45,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:45,556 INFO L87 Difference]: Start difference. First operand 5899 states and 6784 transitions. Second operand 5 states. [2019-10-14 22:04:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:47,267 INFO L93 Difference]: Finished difference Result 13172 states and 15172 transitions. [2019-10-14 22:04:47,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:04:47,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 554 [2019-10-14 22:04:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:47,295 INFO L225 Difference]: With dead ends: 13172 [2019-10-14 22:04:47,295 INFO L226 Difference]: Without dead ends: 7279 [2019-10-14 22:04:47,308 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 558 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2019-10-14 22:04:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7261. [2019-10-14 22:04:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7261 states. [2019-10-14 22:04:47,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 8075 transitions. [2019-10-14 22:04:47,465 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 8075 transitions. Word has length 554 [2019-10-14 22:04:47,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:47,467 INFO L462 AbstractCegarLoop]: Abstraction has 7261 states and 8075 transitions. [2019-10-14 22:04:47,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 8075 transitions. [2019-10-14 22:04:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2019-10-14 22:04:47,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:47,492 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:47,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:47,697 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash -543608489, now seen corresponding path program 1 times [2019-10-14 22:04:47,697 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:47,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614276546] [2019-10-14 22:04:47,698 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:47,698 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:47,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 316 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-10-14 22:04:48,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614276546] [2019-10-14 22:04:48,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459189043] [2019-10-14 22:04:48,534 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 [2019-10-14 22:04:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:48,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 682 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-14 22:04:49,115 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:49,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:04:49,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662900441] [2019-10-14 22:04:49,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:49,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:49,118 INFO L87 Difference]: Start difference. First operand 7261 states and 8075 transitions. Second operand 11 states.