./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/feedback_diverge.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/feedback_diverge.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6e296367f1fe3cf145b6868ec70c2d770b2281a31a9d7dcae84843c6ed48125 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:12:01,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:12:01,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:12:01,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:12:01,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:12:01,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:12:01,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:12:01,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:12:01,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:12:01,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:12:01,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:12:01,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:12:01,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:12:01,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:12:01,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:12:01,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:12:01,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:12:01,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:12:01,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:12:01,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:12:01,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:12:01,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:12:01,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:12:01,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:12:01,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:12:01,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:12:01,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:12:01,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:12:01,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:12:01,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:12:01,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:12:01,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:12:01,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:12:01,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:12:01,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:12:01,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:12:01,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:12:01,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:12:01,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:12:01,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:12:01,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:12:01,711 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:12:01,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:12:01,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:12:01,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:12:01,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:12:01,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:12:01,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:12:01,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:12:01,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:12:01,738 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:12:01,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:12:01,739 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:12:01,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:12:01,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:12:01,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:12:01,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:12:01,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:12:01,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:12:01,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:12:01,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:12:01,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:12:01,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:12:01,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:12:01,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:12:01,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:12:01,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:12:01,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:12:01,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:12:01,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:12:01,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:12:01,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:12:01,743 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:12:01,743 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:12:01,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:12:01,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:12:01,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e296367f1fe3cf145b6868ec70c2d770b2281a31a9d7dcae84843c6ed48125 [2021-12-14 13:12:01,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:12:01,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:12:01,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:12:01,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:12:01,965 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:12:01,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/feedback_diverge.c [2021-12-14 13:12:02,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aa5457a3/d2e17f7e87f74c3f8bee1a2155f99c69/FLAGf82de45c2 [2021-12-14 13:12:02,399 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:12:02,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/feedback_diverge.c [2021-12-14 13:12:02,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aa5457a3/d2e17f7e87f74c3f8bee1a2155f99c69/FLAGf82de45c2 [2021-12-14 13:12:02,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aa5457a3/d2e17f7e87f74c3f8bee1a2155f99c69 [2021-12-14 13:12:02,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:12:02,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:12:02,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:12:02,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:12:02,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:12:02,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@724b3200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02, skipping insertion in model container [2021-12-14 13:12:02,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:12:02,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:12:02,594 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2021-12-14 13:12:02,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:12:02,615 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:12:02,624 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2021-12-14 13:12:02,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:12:02,641 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:12:02,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02 WrapperNode [2021-12-14 13:12:02,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:12:02,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:12:02,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:12:02,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:12:02,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,667 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 47 [2021-12-14 13:12:02,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:12:02,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:12:02,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:12:02,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:12:02,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:12:02,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:12:02,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:12:02,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:12:02,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02" (1/1) ... [2021-12-14 13:12:02,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:12:02,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:12:02,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 13:12:02,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 13:12:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:12:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:12:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:12:02,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:12:02,856 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:12:02,857 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:12:02,931 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:12:02,935 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:12:02,935 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 13:12:02,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:12:02 BoogieIcfgContainer [2021-12-14 13:12:02,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:12:02,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:12:02,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:12:02,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:12:02,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:12:02" (1/3) ... [2021-12-14 13:12:02,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a5cac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:12:02, skipping insertion in model container [2021-12-14 13:12:02,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:12:02" (2/3) ... [2021-12-14 13:12:02,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a5cac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:12:02, skipping insertion in model container [2021-12-14 13:12:02,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:12:02" (3/3) ... [2021-12-14 13:12:02,942 INFO L111 eAbstractionObserver]: Analyzing ICFG feedback_diverge.c [2021-12-14 13:12:02,946 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:12:02,946 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:12:02,974 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:12:02,979 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 13:12:02,979 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:12:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 13:12:02,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:12:02,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 13:12:02,992 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:12:02,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:12:02,995 INFO L85 PathProgramCache]: Analyzing trace with hash 889620925, now seen corresponding path program 1 times [2021-12-14 13:12:03,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:12:03,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494808271] [2021-12-14 13:12:03,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:12:03,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:12:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:12:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:03,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:12:03,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494808271] [2021-12-14 13:12:03,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494808271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:12:03,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:12:03,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:12:03,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306146012] [2021-12-14 13:12:03,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:12:03,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:12:03,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:12:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:12:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:12:03,189 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:12:03,214 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-12-14 13:12:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:12:03,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-14 13:12:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:12:03,222 INFO L225 Difference]: With dead ends: 39 [2021-12-14 13:12:03,222 INFO L226 Difference]: Without dead ends: 20 [2021-12-14 13:12:03,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:12:03,230 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:12:03,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:12:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-14 13:12:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2021-12-14 13:12:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-12-14 13:12:03,257 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2021-12-14 13:12:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:12:03,257 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-12-14 13:12:03,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-12-14 13:12:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 13:12:03,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:12:03,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:12:03,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:12:03,259 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:12:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:12:03,260 INFO L85 PathProgramCache]: Analyzing trace with hash -875759451, now seen corresponding path program 1 times [2021-12-14 13:12:03,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:12:03,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391906954] [2021-12-14 13:12:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:12:03,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:12:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:12:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:03,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:12:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391906954] [2021-12-14 13:12:03,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391906954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:12:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744851473] [2021-12-14 13:12:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:12:03,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:03,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:12:03,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:12:03,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:12:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:12:03,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 13:12:03,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:12:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:03,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:12:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:03,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744851473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:12:03,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:12:03,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-14 13:12:03,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112282104] [2021-12-14 13:12:03,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:12:03,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 13:12:03,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:12:03,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 13:12:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:12:03,427 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:03,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:12:03,459 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-14 13:12:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 13:12:03,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 13:12:03,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:12:03,461 INFO L225 Difference]: With dead ends: 39 [2021-12-14 13:12:03,462 INFO L226 Difference]: Without dead ends: 35 [2021-12-14 13:12:03,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:12:03,463 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:12:03,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 44 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:12:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-14 13:12:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-14 13:12:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-14 13:12:03,472 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 11 [2021-12-14 13:12:03,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:12:03,473 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-14 13:12:03,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:03,474 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-14 13:12:03,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 13:12:03,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:12:03,476 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-14 13:12:03,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 13:12:03,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:03,692 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:12:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:12:03,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1424528451, now seen corresponding path program 2 times [2021-12-14 13:12:03,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:12:03,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389715262] [2021-12-14 13:12:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:12:03,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:12:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:12:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:03,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:12:03,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389715262] [2021-12-14 13:12:03,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389715262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:12:03,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565638474] [2021-12-14 13:12:03,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:12:03,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:03,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:12:03,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:12:03,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:12:03,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:12:03,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:12:03,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 13:12:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:12:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:03,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:12:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:03,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565638474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:12:03,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:12:03,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-14 13:12:03,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148483382] [2021-12-14 13:12:03,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:12:03,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 13:12:03,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:12:03,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 13:12:03,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-14 13:12:03,945 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:12:03,981 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-12-14 13:12:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 13:12:03,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-14 13:12:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:12:03,982 INFO L225 Difference]: With dead ends: 81 [2021-12-14 13:12:03,982 INFO L226 Difference]: Without dead ends: 77 [2021-12-14 13:12:03,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-14 13:12:03,983 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:12:03,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 90 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:12:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-14 13:12:03,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-14 13:12:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2021-12-14 13:12:03,990 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 26 [2021-12-14 13:12:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:12:03,990 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2021-12-14 13:12:03,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:03,990 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2021-12-14 13:12:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-14 13:12:03,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:12:03,992 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-14 13:12:04,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 13:12:04,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-14 13:12:04,208 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:12:04,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:12:04,209 INFO L85 PathProgramCache]: Analyzing trace with hash -998809923, now seen corresponding path program 3 times [2021-12-14 13:12:04,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:12:04,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979017186] [2021-12-14 13:12:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:12:04,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:12:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:12:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:04,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:12:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979017186] [2021-12-14 13:12:04,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979017186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:12:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812880932] [2021-12-14 13:12:04,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:12:04,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:04,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:12:04,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:12:04,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:12:04,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-14 13:12:04,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:12:04,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 13:12:04,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:12:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:04,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:12:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:04,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812880932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:12:04,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:12:04,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-14 13:12:04,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770603722] [2021-12-14 13:12:04,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:12:04,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 13:12:04,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:12:04,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 13:12:04,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-14 13:12:04,677 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:12:04,734 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2021-12-14 13:12:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 13:12:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-14 13:12:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:12:04,735 INFO L225 Difference]: With dead ends: 165 [2021-12-14 13:12:04,735 INFO L226 Difference]: Without dead ends: 161 [2021-12-14 13:12:04,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-14 13:12:04,736 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 277 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:12:04,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 154 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:12:04,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-14 13:12:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-12-14 13:12:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.14375) internal successors, (183), 160 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2021-12-14 13:12:04,745 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 56 [2021-12-14 13:12:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:12:04,745 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2021-12-14 13:12:04,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2021-12-14 13:12:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 13:12:04,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:12:04,748 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-12-14 13:12:04,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:12:04,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:04,963 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:12:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:12:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash 870679741, now seen corresponding path program 4 times [2021-12-14 13:12:04,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:12:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362568551] [2021-12-14 13:12:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:12:04,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:12:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:12:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:05,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:12:05,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362568551] [2021-12-14 13:12:05,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362568551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:12:05,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541517663] [2021-12-14 13:12:05,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:12:05,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:05,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:12:05,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:12:05,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:12:05,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:12:05,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:12:05,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 13:12:05,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:12:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:05,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:12:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:06,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541517663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:12:06,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:12:06,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-14 13:12:06,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774332440] [2021-12-14 13:12:06,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:12:06,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-14 13:12:06,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:12:06,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-14 13:12:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-14 13:12:06,323 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:06,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:12:06,468 INFO L93 Difference]: Finished difference Result 333 states and 402 transitions. [2021-12-14 13:12:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-14 13:12:06,469 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-14 13:12:06,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:12:06,471 INFO L225 Difference]: With dead ends: 333 [2021-12-14 13:12:06,471 INFO L226 Difference]: Without dead ends: 329 [2021-12-14 13:12:06,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-14 13:12:06,472 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 810 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:12:06,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 298 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:12:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-14 13:12:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2021-12-14 13:12:06,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.1432926829268293) internal successors, (375), 328 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 375 transitions. [2021-12-14 13:12:06,485 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 375 transitions. Word has length 116 [2021-12-14 13:12:06,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:12:06,485 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 375 transitions. [2021-12-14 13:12:06,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 375 transitions. [2021-12-14 13:12:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-14 13:12:06,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:12:06,489 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-12-14 13:12:06,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:12:06,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:06,706 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:12:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:12:06,706 INFO L85 PathProgramCache]: Analyzing trace with hash 582668477, now seen corresponding path program 5 times [2021-12-14 13:12:06,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:12:06,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577995937] [2021-12-14 13:12:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:12:06,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:12:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:12:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:07,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:12:07,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577995937] [2021-12-14 13:12:07,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577995937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:12:07,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146867111] [2021-12-14 13:12:07,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:12:07,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:07,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:12:07,711 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:12:07,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:12:07,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-14 13:12:07,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:12:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 13:12:07,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:12:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:08,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:12:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:10,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146867111] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:12:10,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:12:10,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-12-14 13:12:10,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32313734] [2021-12-14 13:12:10,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:12:10,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-14 13:12:10,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:12:10,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-14 13:12:10,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-14 13:12:10,366 INFO L87 Difference]: Start difference. First operand 329 states and 375 transitions. Second operand has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:11,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:12:11,229 INFO L93 Difference]: Finished difference Result 669 states and 810 transitions. [2021-12-14 13:12:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-14 13:12:11,230 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-12-14 13:12:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:12:11,232 INFO L225 Difference]: With dead ends: 669 [2021-12-14 13:12:11,232 INFO L226 Difference]: Without dead ends: 665 [2021-12-14 13:12:11,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-14 13:12:11,235 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1800 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1800 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:12:11,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1800 Valid, 586 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:12:11,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-14 13:12:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2021-12-14 13:12:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.1430722891566265) internal successors, (759), 664 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 759 transitions. [2021-12-14 13:12:11,249 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 759 transitions. Word has length 236 [2021-12-14 13:12:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:12:11,249 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 759 transitions. [2021-12-14 13:12:11,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 759 transitions. [2021-12-14 13:12:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-12-14 13:12:11,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:12:11,254 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2021-12-14 13:12:11,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 13:12:11,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:11,471 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:12:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:12:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1974900547, now seen corresponding path program 6 times [2021-12-14 13:12:11,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:12:11,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889143012] [2021-12-14 13:12:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:12:11,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:12:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:12:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:14,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:12:14,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889143012] [2021-12-14 13:12:14,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889143012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:12:14,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810228537] [2021-12-14 13:12:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:12:14,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:14,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:12:14,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:12:14,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 13:12:14,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-12-14 13:12:14,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:12:14,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-14 13:12:14,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:12:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:15,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:12:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:21,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810228537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:12:21,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:12:21,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2021-12-14 13:12:21,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240274431] [2021-12-14 13:12:21,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:12:21,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-12-14 13:12:21,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:12:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-12-14 13:12:21,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-12-14 13:12:21,960 INFO L87 Difference]: Start difference. First operand 665 states and 759 transitions. Second operand has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:12:30,400 INFO L93 Difference]: Finished difference Result 1341 states and 1626 transitions. [2021-12-14 13:12:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-12-14 13:12:30,401 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 476 [2021-12-14 13:12:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:12:30,405 INFO L225 Difference]: With dead ends: 1341 [2021-12-14 13:12:30,405 INFO L226 Difference]: Without dead ends: 1337 [2021-12-14 13:12:30,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-12-14 13:12:30,408 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 4323 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4323 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:12:30,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4323 Valid, 1156 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 13:12:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-12-14 13:12:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1337. [2021-12-14 13:12:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 1.1429640718562875) internal successors, (1527), 1336 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1527 transitions. [2021-12-14 13:12:30,425 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1527 transitions. Word has length 476 [2021-12-14 13:12:30,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:12:30,426 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 1527 transitions. [2021-12-14 13:12:30,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:12:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1527 transitions. [2021-12-14 13:12:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2021-12-14 13:12:30,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:12:30,440 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 190, 1, 1, 1, 1, 1, 1] [2021-12-14 13:12:30,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 13:12:30,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:30,644 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:12:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:12:30,645 INFO L85 PathProgramCache]: Analyzing trace with hash -789145411, now seen corresponding path program 7 times [2021-12-14 13:12:30,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:12:30,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133360755] [2021-12-14 13:12:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:12:30,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:12:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:12:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:37,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:12:37,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133360755] [2021-12-14 13:12:37,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133360755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:12:37,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920382185] [2021-12-14 13:12:37,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:12:37,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:12:37,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:12:37,421 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:12:37,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 13:12:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:12:37,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 2319 conjuncts, 192 conjunts are in the unsatisfiable core [2021-12-14 13:12:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:12:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:12:39,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:13:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:13:01,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920382185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:13:01,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:13:01,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2021-12-14 13:13:01,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043409815] [2021-12-14 13:13:01,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:13:01,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-12-14 13:13:01,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:13:01,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-12-14 13:13:01,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2021-12-14 13:13:01,302 INFO L87 Difference]: Start difference. First operand 1337 states and 1527 transitions. Second operand has 385 states, 385 states have (on average 4.9714285714285715) internal successors, (1914), 385 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)