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/Problem18_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:06:19,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:06:19,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:06:19,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:06:19,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:06:19,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:06:19,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:06:19,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:06:19,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:06:19,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:06:19,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:06:19,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:06:19,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:06:19,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:06:19,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:06:19,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:06:19,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:06:19,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:06:19,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:06:19,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:06:19,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:06:19,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:06:19,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:06:19,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:06:19,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:06:19,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:06:19,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:06:19,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:06:19,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:06:19,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:06:19,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:06:19,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:06:19,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:06:19,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:06:19,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:06:19,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:06:19,340 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 22:06:19,360 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:06:19,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:06:19,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:06:19,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:06:19,363 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:06:19,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:06:19,363 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:06:19,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:06:19,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:06:19,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:06:19,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:06:19,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:06:19,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:06:19,365 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:06:19,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:06:19,366 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:06:19,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:06:19,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:06:19,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:06:19,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:06:19,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:06:19,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:06:19,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:06:19,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:06:19,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:06:19,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:06:19,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:06:19,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:06:19,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:06:19,646 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:06:19,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:06:19,662 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:06:19,663 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:06:19,663 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:06:19,664 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label51.c [2019-10-14 22:06:19,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5803f0a64/7589a6bc2c104fa5b315706f50748a63/FLAG024bcc9f4 [2019-10-14 22:06:20,364 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:06:20,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label51.c [2019-10-14 22:06:20,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5803f0a64/7589a6bc2c104fa5b315706f50748a63/FLAG024bcc9f4 [2019-10-14 22:06:20,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5803f0a64/7589a6bc2c104fa5b315706f50748a63 [2019-10-14 22:06:20,570 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:06:20,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:06:20,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:06:20,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:06:20,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:06:20,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:06:20" (1/1) ... [2019-10-14 22:06:20,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62fe4094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:20, skipping insertion in model container [2019-10-14 22:06:20,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:06:20" (1/1) ... [2019-10-14 22:06:20,592 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:06:20,731 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:06:22,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:06:22,013 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:06:22,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:06:22,496 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:06:22,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:22 WrapperNode [2019-10-14 22:06:22,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:06:22,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:06:22,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:06:22,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:06:22,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:22" (1/1) ... [2019-10-14 22:06:22,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:22" (1/1) ... [2019-10-14 22:06:22,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:22" (1/1) ... [2019-10-14 22:06:22,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:22" (1/1) ... [2019-10-14 22:06:22,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:22" (1/1) ... [2019-10-14 22:06:22,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:22" (1/1) ... [2019-10-14 22:06:22,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:22" (1/1) ... [2019-10-14 22:06:22,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:06:22,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:06:22,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:06:22,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:06:22,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:22" (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 22:06:22,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:06:22,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:06:22,789 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:06:22,789 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:06:22,789 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-14 22:06:22,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:06:22,789 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:06:22,789 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:06:22,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-14 22:06:22,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:06:22,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:06:22,790 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:06:22,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:06:22,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:06:22,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:06:26,322 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:06:26,323 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:06:26,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:06:26 BoogieIcfgContainer [2019-10-14 22:06:26,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:06:26,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:06:26,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:06:26,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:06:26,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:06:20" (1/3) ... [2019-10-14 22:06:26,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19502d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:06:26, skipping insertion in model container [2019-10-14 22:06:26,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:22" (2/3) ... [2019-10-14 22:06:26,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19502d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:06:26, skipping insertion in model container [2019-10-14 22:06:26,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:06:26" (3/3) ... [2019-10-14 22:06:26,337 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label51.c [2019-10-14 22:06:26,348 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:06:26,357 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:06:26,368 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:06:26,412 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:06:26,412 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:06:26,412 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:06:26,412 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:06:26,412 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:06:26,412 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:06:26,413 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:06:26,413 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:06:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-14 22:06:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 22:06:26,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:26,465 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:06:26,467 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1085163511, now seen corresponding path program 1 times [2019-10-14 22:06:26,482 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:26,482 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282838588] [2019-10-14 22:06:26,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:26,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:26,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:26,978 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 22:06:26,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282838588] [2019-10-14 22:06:26,980 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:06:26,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:06:26,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915875270] [2019-10-14 22:06:26,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:06:26,988 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:27,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:06:27,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:06:27,011 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-10-14 22:06:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:06:37,091 INFO L93 Difference]: Finished difference Result 3000 states and 5781 transitions. [2019-10-14 22:06:37,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:06:37,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2019-10-14 22:06:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:06:37,132 INFO L225 Difference]: With dead ends: 3000 [2019-10-14 22:06:37,133 INFO L226 Difference]: Without dead ends: 2142 [2019-10-14 22:06:37,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:06:37,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-10-14 22:06:37,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2138. [2019-10-14 22:06:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2138 states. [2019-10-14 22:06:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3344 transitions. [2019-10-14 22:06:37,322 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3344 transitions. Word has length 66 [2019-10-14 22:06:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:06:37,323 INFO L462 AbstractCegarLoop]: Abstraction has 2138 states and 3344 transitions. [2019-10-14 22:06:37,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:06:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3344 transitions. [2019-10-14 22:06:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-14 22:06:37,330 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:37,331 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:06:37,331 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:37,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:37,332 INFO L82 PathProgramCache]: Analyzing trace with hash 340179813, now seen corresponding path program 1 times [2019-10-14 22:06:37,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:37,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79325555] [2019-10-14 22:06:37,332 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:37,332 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:37,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:06:37,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79325555] [2019-10-14 22:06:37,624 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:06:37,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:06:37,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488332822] [2019-10-14 22:06:37,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:06:37,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:37,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:06:37,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:06:37,628 INFO L87 Difference]: Start difference. First operand 2138 states and 3344 transitions. Second operand 8 states. [2019-10-14 22:06:47,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:06:47,705 INFO L93 Difference]: Finished difference Result 8662 states and 13798 transitions. [2019-10-14 22:06:47,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:06:47,706 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2019-10-14 22:06:47,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:06:47,742 INFO L225 Difference]: With dead ends: 8662 [2019-10-14 22:06:47,743 INFO L226 Difference]: Without dead ends: 6530 [2019-10-14 22:06:47,750 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:06:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6530 states. [2019-10-14 22:06:47,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6530 to 6509. [2019-10-14 22:06:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6509 states. [2019-10-14 22:06:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 8974 transitions. [2019-10-14 22:06:47,957 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 8974 transitions. Word has length 135 [2019-10-14 22:06:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:06:47,960 INFO L462 AbstractCegarLoop]: Abstraction has 6509 states and 8974 transitions. [2019-10-14 22:06:47,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:06:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 8974 transitions. [2019-10-14 22:06:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-10-14 22:06:47,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:47,975 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:06:47,977 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:47,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1665750083, now seen corresponding path program 1 times [2019-10-14 22:06:47,978 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:47,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627777213] [2019-10-14 22:06:47,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:47,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:47,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:06:48,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627777213] [2019-10-14 22:06:48,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038860850] [2019-10-14 22:06:48,500 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 22:06:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:48,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:06:48,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:06:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 212 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:06:48,841 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:06:48,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:06:48,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92122193] [2019-10-14 22:06:48,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:06:48,843 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:48,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:06:48,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:06:48,844 INFO L87 Difference]: Start difference. First operand 6509 states and 8974 transitions. Second operand 11 states.