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/Problem03_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:55:29,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:55:29,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:55:29,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:55:29,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:55:29,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:55:29,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:55:29,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:55:29,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:55:29,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:55:29,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:55:29,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:55:29,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:55:29,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:55:29,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:55:29,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:55:29,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:55:29,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:55:29,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:55:29,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:55:29,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:55:29,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:55:29,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:55:29,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:55:29,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:55:29,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:55:29,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:55:29,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:55:29,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:55:29,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:55:29,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:55:29,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:55:29,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:55:29,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:55:29,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:55:29,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:55:29,643 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 [2019-10-13 17:55:29,663 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:55:29,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:55:29,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:55:29,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:55:29,666 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:55:29,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:55:29,667 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:55:29,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:55:29,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:55:29,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:55:29,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:55:29,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:55:29,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:55:29,670 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:55:29,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:55:29,670 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:55:29,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:55:29,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:55:29,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:55:29,671 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:55:29,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:55:29,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:55:29,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:55:29,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:55:29,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:55:29,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:55:29,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:55:29,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:55:29,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:55:29,974 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:55:29,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:55:29,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:55:29,993 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:55:29,994 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:55:29,994 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label38.c [2019-10-13 17:55:30,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de1909b55/5948d87df46d48d291781fcaf8aa80bd/FLAGff2cdab7c [2019-10-13 17:55:30,718 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:55:30,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label38.c [2019-10-13 17:55:30,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de1909b55/5948d87df46d48d291781fcaf8aa80bd/FLAGff2cdab7c [2019-10-13 17:55:30,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de1909b55/5948d87df46d48d291781fcaf8aa80bd [2019-10-13 17:55:30,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:55:30,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:55:30,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:30,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:55:30,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:55:30,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:30" (1/1) ... [2019-10-13 17:55:30,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2e6592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:30, skipping insertion in model container [2019-10-13 17:55:30,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:30" (1/1) ... [2019-10-13 17:55:30,906 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:55:30,993 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:55:31,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:31,906 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:55:32,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:32,288 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:55:32,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:32 WrapperNode [2019-10-13 17:55:32,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:32,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:55:32,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:55:32,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:55:32,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:32" (1/1) ... [2019-10-13 17:55:32,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:32" (1/1) ... [2019-10-13 17:55:32,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:32" (1/1) ... [2019-10-13 17:55:32,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:32" (1/1) ... [2019-10-13 17:55:32,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:32" (1/1) ... [2019-10-13 17:55:32,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:32" (1/1) ... [2019-10-13 17:55:32,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:32" (1/1) ... [2019-10-13 17:55:32,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:55:32,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:55:32,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:55:32,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:55:32,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:32" (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 [2019-10-13 17:55:32,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:55:32,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:55:32,543 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:55:32,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:55:32,543 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:55:32,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:55:32,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:55:32,544 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:55:32,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:55:32,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:55:32,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:55:34,613 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:55:34,616 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:55:34,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:34 BoogieIcfgContainer [2019-10-13 17:55:34,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:55:34,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:55:34,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:55:34,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:55:34,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:55:30" (1/3) ... [2019-10-13 17:55:34,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ceb79bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:34, skipping insertion in model container [2019-10-13 17:55:34,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:32" (2/3) ... [2019-10-13 17:55:34,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ceb79bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:34, skipping insertion in model container [2019-10-13 17:55:34,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:34" (3/3) ... [2019-10-13 17:55:34,633 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label38.c [2019-10-13 17:55:34,649 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:55:34,660 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:55:34,672 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:55:34,714 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:55:34,714 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:55:34,715 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:55:34,715 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:55:34,715 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:55:34,716 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:55:34,716 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:55:34,716 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:55:34,754 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-13 17:55:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-13 17:55:34,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:34,788 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:34,791 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2093619232, now seen corresponding path program 1 times [2019-10-13 17:55:34,807 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:34,807 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114739786] [2019-10-13 17:55:34,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:34,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:34,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:35,726 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:35,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114739786] [2019-10-13 17:55:35,896 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:35,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:55:35,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5809056] [2019-10-13 17:55:35,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:35,902 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:35,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:35,919 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-13 17:55:36,123 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:36,673 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:55:40,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:40,613 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2019-10-13 17:55:40,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:55:40,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2019-10-13 17:55:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:40,639 INFO L225 Difference]: With dead ends: 1107 [2019-10-13 17:55:40,640 INFO L226 Difference]: Without dead ends: 699 [2019-10-13 17:55:40,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:55:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-10-13 17:55:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2019-10-13 17:55:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2019-10-13 17:55:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2019-10-13 17:55:40,752 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 207 [2019-10-13 17:55:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:40,758 INFO L462 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2019-10-13 17:55:40,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2019-10-13 17:55:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-13 17:55:40,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:40,774 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:40,774 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:40,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1254940916, now seen corresponding path program 1 times [2019-10-13 17:55:40,776 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:40,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299707542] [2019-10-13 17:55:40,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:40,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:40,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:41,264 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:41,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299707542] [2019-10-13 17:55:41,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529656533] [2019-10-13 17:55:41,489 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 [2019-10-13 17:55:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:41,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:55:41,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:41,963 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:41,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 17:55:41,964 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444831244] [2019-10-13 17:55:41,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:41,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:41,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:41,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:55:41,967 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand 3 states. [2019-10-13 17:55:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:43,146 INFO L93 Difference]: Finished difference Result 1364 states and 2099 transitions. [2019-10-13 17:55:43,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:55:43,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2019-10-13 17:55:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:43,154 INFO L225 Difference]: With dead ends: 1364 [2019-10-13 17:55:43,154 INFO L226 Difference]: Without dead ends: 896 [2019-10-13 17:55:43,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:55:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-10-13 17:55:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 894. [2019-10-13 17:55:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-10-13 17:55:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1212 transitions. [2019-10-13 17:55:43,198 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1212 transitions. Word has length 219 [2019-10-13 17:55:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:43,199 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1212 transitions. [2019-10-13 17:55:43,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:55:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1212 transitions. [2019-10-13 17:55:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-13 17:55:43,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:43,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:43,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:43,409 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:43,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:43,410 INFO L82 PathProgramCache]: Analyzing trace with hash 536359495, now seen corresponding path program 1 times [2019-10-13 17:55:43,410 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:43,411 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010312745] [2019-10-13 17:55:43,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:43,412 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:43,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:43,695 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:44,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010312745] [2019-10-13 17:55:44,034 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:44,035 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:55:44,035 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476046715] [2019-10-13 17:55:44,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:55:44,037 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:44,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:55:44,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:44,038 INFO L87 Difference]: Start difference. First operand 894 states and 1212 transitions. Second operand 9 states. [2019-10-13 17:55:44,218 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:44,867 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:47,782 INFO L93 Difference]: Finished difference Result 2246 states and 3211 transitions. [2019-10-13 17:55:47,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:55:47,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 234 [2019-10-13 17:55:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:47,792 INFO L225 Difference]: With dead ends: 2246 [2019-10-13 17:55:47,792 INFO L226 Difference]: Without dead ends: 1358 [2019-10-13 17:55:47,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:55:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2019-10-13 17:55:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1332. [2019-10-13 17:55:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1332 states. [2019-10-13 17:55:47,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1777 transitions. [2019-10-13 17:55:47,845 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1777 transitions. Word has length 234 [2019-10-13 17:55:47,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:47,846 INFO L462 AbstractCegarLoop]: Abstraction has 1332 states and 1777 transitions. [2019-10-13 17:55:47,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:55:47,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1777 transitions. [2019-10-13 17:55:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-10-13 17:55:47,852 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:47,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:47,853 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:47,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:47,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1119665401, now seen corresponding path program 1 times [2019-10-13 17:55:47,854 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:47,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230173140] [2019-10-13 17:55:47,854 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:47,854 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:47,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:48,107 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:48,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230173140] [2019-10-13 17:55:48,377 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:48,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:55:48,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516321474] [2019-10-13 17:55:48,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:55:48,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:48,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:55:48,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:48,381 INFO L87 Difference]: Start difference. First operand 1332 states and 1777 transitions. Second operand 8 states. [2019-10-13 17:55:48,567 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:49,136 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-13 17:55:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:52,030 INFO L93 Difference]: Finished difference Result 4018 states and 5650 transitions. [2019-10-13 17:55:52,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:55:52,033 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 241 [2019-10-13 17:55:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:52,051 INFO L225 Difference]: With dead ends: 4018 [2019-10-13 17:55:52,051 INFO L226 Difference]: Without dead ends: 2692 [2019-10-13 17:55:52,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:55:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2019-10-13 17:55:52,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2654. [2019-10-13 17:55:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-10-13 17:55:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3619 transitions. [2019-10-13 17:55:52,170 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3619 transitions. Word has length 241 [2019-10-13 17:55:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:52,170 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3619 transitions. [2019-10-13 17:55:52,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:55:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3619 transitions. [2019-10-13 17:55:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-10-13 17:55:52,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:52,180 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:52,180 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash -850359650, now seen corresponding path program 1 times [2019-10-13 17:55:52,181 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:52,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561996038] [2019-10-13 17:55:52,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:52,182 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:52,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:52,380 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:55:52,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561996038] [2019-10-13 17:55:52,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765938816] [2019-10-13 17:55:52,583 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 [2019-10-13 17:55:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:52,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:55:52,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:55:52,878 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:52,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 17:55:52,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225298513] [2019-10-13 17:55:52,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:52,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:52,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:52,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:52,880 INFO L87 Difference]: Start difference. First operand 2654 states and 3619 transitions. Second operand 3 states. [2019-10-13 17:55:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:53,859 INFO L93 Difference]: Finished difference Result 5304 states and 7251 transitions. [2019-10-13 17:55:53,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:55:53,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 243 [2019-10-13 17:55:53,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:53,874 INFO L225 Difference]: With dead ends: 5304 [2019-10-13 17:55:53,875 INFO L226 Difference]: Without dead ends: 2656 [2019-10-13 17:55:53,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-10-13 17:55:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2019-10-13 17:55:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-10-13 17:55:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3493 transitions. [2019-10-13 17:55:53,954 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3493 transitions. Word has length 243 [2019-10-13 17:55:53,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:53,954 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3493 transitions. [2019-10-13 17:55:53,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:55:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3493 transitions. [2019-10-13 17:55:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-10-13 17:55:53,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:53,964 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:54,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:54,171 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:54,171 INFO L82 PathProgramCache]: Analyzing trace with hash 476797618, now seen corresponding path program 1 times [2019-10-13 17:55:54,172 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:54,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334390495] [2019-10-13 17:55:54,173 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:54,173 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:54,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:54,493 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:54,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334390495] [2019-10-13 17:55:54,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568453382] [2019-10-13 17:55:54,699 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 [2019-10-13 17:55:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:54,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:55:54,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:55,156 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:55,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-13 17:55:55,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854641239] [2019-10-13 17:55:55,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:55,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:55,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:55,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:55,159 INFO L87 Difference]: Start difference. First operand 2654 states and 3493 transitions. Second operand 3 states. [2019-10-13 17:55:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:56,305 INFO L93 Difference]: Finished difference Result 7854 states and 10598 transitions. [2019-10-13 17:55:56,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:55:56,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2019-10-13 17:55:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:56,335 INFO L225 Difference]: With dead ends: 7854 [2019-10-13 17:55:56,335 INFO L226 Difference]: Without dead ends: 5206 [2019-10-13 17:55:56,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:56,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2019-10-13 17:55:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 5200. [2019-10-13 17:55:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5200 states. [2019-10-13 17:55:56,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 6852 transitions. [2019-10-13 17:55:56,486 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 6852 transitions. Word has length 252 [2019-10-13 17:55:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:56,487 INFO L462 AbstractCegarLoop]: Abstraction has 5200 states and 6852 transitions. [2019-10-13 17:55:56,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:55:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 6852 transitions. [2019-10-13 17:55:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-10-13 17:55:56,506 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:56,507 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:56,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:56,720 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash -944811427, now seen corresponding path program 1 times [2019-10-13 17:55:56,721 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:56,721 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45752270] [2019-10-13 17:55:56,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:56,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:56,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:56,945 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:55:57,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45752270] [2019-10-13 17:55:57,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163941028] [2019-10-13 17:55:57,159 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 [2019-10-13 17:55:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:57,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:55:57,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:55:57,508 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:57,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 17:55:57,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149042835] [2019-10-13 17:55:57,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:57,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:57,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:57,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:55:57,511 INFO L87 Difference]: Start difference. First operand 5200 states and 6852 transitions. Second operand 5 states. [2019-10-13 17:55:58,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:58,976 INFO L93 Difference]: Finished difference Result 10482 states and 14336 transitions. [2019-10-13 17:55:58,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:55:58,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 258 [2019-10-13 17:55:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:59,004 INFO L225 Difference]: With dead ends: 10482 [2019-10-13 17:55:59,005 INFO L226 Difference]: Without dead ends: 5288 [2019-10-13 17:55:59,018 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:55:59,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2019-10-13 17:55:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 5216. [2019-10-13 17:55:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5216 states. [2019-10-13 17:55:59,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 6776 transitions. [2019-10-13 17:55:59,161 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 6776 transitions. Word has length 258 [2019-10-13 17:55:59,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:59,161 INFO L462 AbstractCegarLoop]: Abstraction has 5216 states and 6776 transitions. [2019-10-13 17:55:59,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 6776 transitions. [2019-10-13 17:55:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-10-13 17:55:59,183 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:59,184 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:59,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:59,389 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:59,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:59,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1466681545, now seen corresponding path program 1 times [2019-10-13 17:55:59,389 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:59,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717191442] [2019-10-13 17:55:59,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:59,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:59,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,622 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 65 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:55:59,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717191442] [2019-10-13 17:55:59,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631915381] [2019-10-13 17:55:59,954 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 [2019-10-13 17:56:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:00,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:56:00,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:56:00,245 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:56:00,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:56:00,246 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602740654] [2019-10-13 17:56:00,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:56:00,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:00,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:56:00,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:56:00,247 INFO L87 Difference]: Start difference. First operand 5216 states and 6776 transitions. Second operand 11 states. [2019-10-13 17:56:00,414 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:00,718 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-13 17:56:02,861 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 130