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_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:55:23,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:55:23,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:55:23,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:55:23,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:55:23,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:55:23,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:55:23,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:55:23,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:55:23,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:55:23,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:55:23,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:55:23,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:55:23,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:55:23,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:55:23,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:55:23,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:55:23,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:55:23,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:55:23,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:55:23,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:55:23,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:55:23,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:55:23,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:55:23,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:55:23,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:55:23,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:55:23,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:55:23,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:55:23,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:55:23,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:55:23,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:55:23,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:55:23,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:55:23,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:55:23,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:55:23,725 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 17:55:23,752 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:55:23,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:55:23,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:55:23,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:55:23,754 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:55:23,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:55:23,754 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:55:23,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:55:23,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:55:23,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:55:23,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:55:23,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:55:23,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:55:23,756 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:55:23,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:55:23,756 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:55:23,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:55:23,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:55:23,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:55:23,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:55:23,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:55:23,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:55:23,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:55:23,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:55:23,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:55:23,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:55:23,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:55:23,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:55:23,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:55:24,051 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:55:24,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:55:24,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:55:24,076 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:55:24,077 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:55:24,077 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2019-10-13 17:55:24,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a9292ff8/5de4ccf0ffbf44c7a28fa5523ade19b4/FLAGddeabd1fb [2019-10-13 17:55:24,762 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:55:24,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2019-10-13 17:55:24,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a9292ff8/5de4ccf0ffbf44c7a28fa5523ade19b4/FLAGddeabd1fb [2019-10-13 17:55:24,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a9292ff8/5de4ccf0ffbf44c7a28fa5523ade19b4 [2019-10-13 17:55:24,946 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:55:24,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:55:24,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:24,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:55:24,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:55:24,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:24" (1/1) ... [2019-10-13 17:55:24,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e605b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:24, skipping insertion in model container [2019-10-13 17:55:24,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:24" (1/1) ... [2019-10-13 17:55:24,965 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:55:25,055 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:55:25,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:25,937 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:55:26,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:26,225 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:55:26,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26 WrapperNode [2019-10-13 17:55:26,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:26,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:55:26,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:55:26,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:55:26,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:55:26,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:55:26,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:55:26,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:55:26,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (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 17:55:26,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:55:26,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:55:26,483 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:55:26,483 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:55:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:55:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:55:26,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:55:26,485 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:55:26,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:55:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:55:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:55:28,465 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:55:28,465 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:55:28,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:28 BoogieIcfgContainer [2019-10-13 17:55:28,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:55:28,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:55:28,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:55:28,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:55:28,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:55:24" (1/3) ... [2019-10-13 17:55:28,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ede6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:28, skipping insertion in model container [2019-10-13 17:55:28,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (2/3) ... [2019-10-13 17:55:28,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ede6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:28, skipping insertion in model container [2019-10-13 17:55:28,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:28" (3/3) ... [2019-10-13 17:55:28,478 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label27.c [2019-10-13 17:55:28,492 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:55:28,504 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:55:28,519 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:55:28,557 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:55:28,557 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:55:28,557 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:55:28,557 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:55:28,558 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:55:28,558 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:55:28,558 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:55:28,558 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:55:28,589 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-13 17:55:28,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 17:55:28,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:28,609 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] [2019-10-13 17:55:28,611 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:28,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1303003168, now seen corresponding path program 1 times [2019-10-13 17:55:28,633 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:28,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313975064] [2019-10-13 17:55:28,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:28,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:28,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:29,615 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:29,769 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 17:55:29,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313975064] [2019-10-13 17:55:29,771 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:29,771 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:55:29,771 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200103299] [2019-10-13 17:55:29,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:29,777 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:29,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:29,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:29,795 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-13 17:55:30,014 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:30,564 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:55:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:34,212 INFO L93 Difference]: Finished difference Result 1121 states and 2001 transitions. [2019-10-13 17:55:34,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:55:34,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2019-10-13 17:55:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:34,254 INFO L225 Difference]: With dead ends: 1121 [2019-10-13 17:55:34,254 INFO L226 Difference]: Without dead ends: 712 [2019-10-13 17:55:34,268 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:55:34,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2019-10-13 17:55:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 469. [2019-10-13 17:55:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-10-13 17:55:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 753 transitions. [2019-10-13 17:55:34,361 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 753 transitions. Word has length 159 [2019-10-13 17:55:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:34,362 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 753 transitions. [2019-10-13 17:55:34,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:34,363 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 753 transitions. [2019-10-13 17:55:34,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 17:55:34,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:34,369 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:34,370 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:34,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:34,370 INFO L82 PathProgramCache]: Analyzing trace with hash 436458787, now seen corresponding path program 1 times [2019-10-13 17:55:34,371 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:34,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721738770] [2019-10-13 17:55:34,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:34,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:34,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:34,654 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:34,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721738770] [2019-10-13 17:55:34,849 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:34,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:55:34,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103157038] [2019-10-13 17:55:34,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:55:34,853 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:34,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:55:34,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:34,854 INFO L87 Difference]: Start difference. First operand 469 states and 753 transitions. Second operand 8 states. [2019-10-13 17:55:35,058 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:37,957 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-13 17:55:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:38,568 INFO L93 Difference]: Finished difference Result 1416 states and 2361 transitions. [2019-10-13 17:55:38,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:55:38,568 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 168 [2019-10-13 17:55:38,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:38,576 INFO L225 Difference]: With dead ends: 1416 [2019-10-13 17:55:38,577 INFO L226 Difference]: Without dead ends: 953 [2019-10-13 17:55:38,579 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:55:38,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2019-10-13 17:55:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 908. [2019-10-13 17:55:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2019-10-13 17:55:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1448 transitions. [2019-10-13 17:55:38,638 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1448 transitions. Word has length 168 [2019-10-13 17:55:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:38,638 INFO L462 AbstractCegarLoop]: Abstraction has 908 states and 1448 transitions. [2019-10-13 17:55:38,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:55:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1448 transitions. [2019-10-13 17:55:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 17:55:38,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:38,645 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:55:38,645 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:38,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1302221225, now seen corresponding path program 1 times [2019-10-13 17:55:38,646 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:38,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733182334] [2019-10-13 17:55:38,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:38,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:38,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:38,939 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:39,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733182334] [2019-10-13 17:55:39,310 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:39,310 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:55:39,311 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141735147] [2019-10-13 17:55:39,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:55:39,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:39,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:55:39,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:39,321 INFO L87 Difference]: Start difference. First operand 908 states and 1448 transitions. Second operand 8 states. [2019-10-13 17:55:39,463 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:39,773 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:40,141 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:55:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:43,912 INFO L93 Difference]: Finished difference Result 3573 states and 5952 transitions. [2019-10-13 17:55:43,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:55:43,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 169 [2019-10-13 17:55:43,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:43,932 INFO L225 Difference]: With dead ends: 3573 [2019-10-13 17:55:43,932 INFO L226 Difference]: Without dead ends: 2671 [2019-10-13 17:55:43,937 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:55:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2019-10-13 17:55:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2636. [2019-10-13 17:55:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2636 states. [2019-10-13 17:55:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 4006 transitions. [2019-10-13 17:55:44,051 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 4006 transitions. Word has length 169 [2019-10-13 17:55:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:44,051 INFO L462 AbstractCegarLoop]: Abstraction has 2636 states and 4006 transitions. [2019-10-13 17:55:44,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:55:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 4006 transitions. [2019-10-13 17:55:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 17:55:44,061 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:44,062 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] [2019-10-13 17:55:44,062 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:44,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1015492916, now seen corresponding path program 1 times [2019-10-13 17:55:44,063 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:44,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965519772] [2019-10-13 17:55:44,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:44,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:44,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,479 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,690 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 17:55:44,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965519772] [2019-10-13 17:55:44,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588567626] [2019-10-13 17:55:44,691 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 17:55:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:55:44,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:45,030 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 17:55:45,031 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:45,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-13 17:55:45,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14388804] [2019-10-13 17:55:45,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:45,032 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:45,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:45,033 INFO L87 Difference]: Start difference. First operand 2636 states and 4006 transitions. Second operand 5 states. [2019-10-13 17:55:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:46,689 INFO L93 Difference]: Finished difference Result 8000 states and 12959 transitions. [2019-10-13 17:55:46,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:55:46,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2019-10-13 17:55:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:46,723 INFO L225 Difference]: With dead ends: 8000 [2019-10-13 17:55:46,723 INFO L226 Difference]: Without dead ends: 5370 [2019-10-13 17:55:46,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:55:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5370 states. [2019-10-13 17:55:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5370 to 5308. [2019-10-13 17:55:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5308 states. [2019-10-13 17:55:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5308 states to 5308 states and 8266 transitions. [2019-10-13 17:55:46,958 INFO L78 Accepts]: Start accepts. Automaton has 5308 states and 8266 transitions. Word has length 171 [2019-10-13 17:55:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:46,959 INFO L462 AbstractCegarLoop]: Abstraction has 5308 states and 8266 transitions. [2019-10-13 17:55:46,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5308 states and 8266 transitions. [2019-10-13 17:55:46,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 17:55:46,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:46,981 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:55:47,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:47,196 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:47,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1082780184, now seen corresponding path program 1 times [2019-10-13 17:55:47,197 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:47,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115096145] [2019-10-13 17:55:47,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:47,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:47,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:47,605 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:47,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115096145] [2019-10-13 17:55:47,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915219189] [2019-10-13 17:55:47,813 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 17:55:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:48,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:55:48,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:48,099 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:48,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-13 17:55:48,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833779985] [2019-10-13 17:55:48,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:48,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:48,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:48,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:48,102 INFO L87 Difference]: Start difference. First operand 5308 states and 8266 transitions. Second operand 3 states. [2019-10-13 17:55:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:49,283 INFO L93 Difference]: Finished difference Result 15348 states and 24715 transitions. [2019-10-13 17:55:49,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:55:49,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-10-13 17:55:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:49,348 INFO L225 Difference]: With dead ends: 15348 [2019-10-13 17:55:49,349 INFO L226 Difference]: Without dead ends: 10046 [2019-10-13 17:55:49,365 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2019-10-13 17:55:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 10030. [2019-10-13 17:55:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10030 states. [2019-10-13 17:55:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10030 states to 10030 states and 15540 transitions. [2019-10-13 17:55:49,745 INFO L78 Accepts]: Start accepts. Automaton has 10030 states and 15540 transitions. Word has length 173 [2019-10-13 17:55:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:49,751 INFO L462 AbstractCegarLoop]: Abstraction has 10030 states and 15540 transitions. [2019-10-13 17:55:49,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:55:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 10030 states and 15540 transitions. [2019-10-13 17:55:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 17:55:49,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:49,782 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:55:49,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:49,994 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:49,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1343685801, now seen corresponding path program 1 times [2019-10-13 17:55:49,995 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:49,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395946804] [2019-10-13 17:55:49,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:49,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:49,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:50,221 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:50,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395946804] [2019-10-13 17:55:50,462 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:50,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:55:50,463 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739045230] [2019-10-13 17:55:50,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:55:50,464 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:50,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:55:50,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:50,465 INFO L87 Difference]: Start difference. First operand 10030 states and 15540 transitions. Second operand 9 states. [2019-10-13 17:55:50,641 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:51,004 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:51,395 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:55:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:55,446 INFO L93 Difference]: Finished difference Result 36208 states and 60113 transitions. [2019-10-13 17:55:55,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:55:55,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-13 17:55:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:55,616 INFO L225 Difference]: With dead ends: 36208 [2019-10-13 17:55:55,616 INFO L226 Difference]: Without dead ends: 26184 [2019-10-13 17:55:55,774 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:55:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26184 states. [2019-10-13 17:55:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26184 to 26008. [2019-10-13 17:55:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26008 states. [2019-10-13 17:55:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26008 states to 26008 states and 38650 transitions. [2019-10-13 17:55:56,865 INFO L78 Accepts]: Start accepts. Automaton has 26008 states and 38650 transitions. Word has length 178 [2019-10-13 17:55:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:56,865 INFO L462 AbstractCegarLoop]: Abstraction has 26008 states and 38650 transitions. [2019-10-13 17:55:56,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:55:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 26008 states and 38650 transitions. [2019-10-13 17:55:56,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 17:55:56,937 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:56,937 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:55:56,937 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:56,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:56,938 INFO L82 PathProgramCache]: Analyzing trace with hash 601297791, now seen corresponding path program 1 times [2019-10-13 17:55:56,939 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:56,939 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72451965] [2019-10-13 17:55:56,939 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:56,939 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:56,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:57,177 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:57,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72451965] [2019-10-13 17:55:57,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:57,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:55:57,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563782848] [2019-10-13 17:55:57,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:55:57,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:57,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:55:57,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:57,358 INFO L87 Difference]: Start difference. First operand 26008 states and 38650 transitions. Second operand 9 states. [2019-10-13 17:55:57,506 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129