./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/loops-crafted-1/mono-crafted_14.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 538775af36be57be36a6cd470d0ff7a3d7714753249a7d4cb9a7b907cdacda78 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:07:51,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:07:51,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:07:51,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:07:51,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:07:51,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:07:51,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:07:51,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:07:51,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:07:51,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:07:51,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:07:51,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:07:51,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:07:51,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:07:51,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:07:51,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:07:51,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:07:51,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:07:51,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:07:51,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:07:51,686 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:07:51,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:07:51,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:07:51,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:07:51,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:07:51,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:07:51,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:07:51,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:07:51,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:07:51,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:07:51,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:07:51,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:07:51,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:07:51,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:07:51,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:07:51,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:07:51,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:07:51,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:07:51,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:07:51,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:07:51,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:07:51,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:07:51,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:07:51,726 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:07:51,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:07:51,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:07:51,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:07:51,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:07:51,727 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:07:51,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:07:51,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:07:51,728 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:07:51,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:07:51,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:07:51,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:07:51,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:07:51,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:07:51,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:07:51,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:07:51,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:07:51,730 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:07:51,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:07:51,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:07:51,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:07:51,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:07:51,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:07:51,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:07:51,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:07:51,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:07:51,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:07:51,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:07:51,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:07:51,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:07:51,732 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:07:51,732 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:07:51,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:07:51,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 538775af36be57be36a6cd470d0ff7a3d7714753249a7d4cb9a7b907cdacda78 [2022-07-12 04:07:51,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:07:51,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:07:51,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:07:51,950 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:07:51,950 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:07:51,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2022-07-12 04:07:52,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f89a27c/18c1e0994fff4571a5377d9fc0ed5407/FLAGcc9e1f6ab [2022-07-12 04:07:52,405 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:07:52,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2022-07-12 04:07:52,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f89a27c/18c1e0994fff4571a5377d9fc0ed5407/FLAGcc9e1f6ab [2022-07-12 04:07:52,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f89a27c/18c1e0994fff4571a5377d9fc0ed5407 [2022-07-12 04:07:52,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:07:52,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:07:52,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:07:52,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:07:52,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:07:52,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5959e8bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52, skipping insertion in model container [2022-07-12 04:07:52,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:07:52,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:07:52,550 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/loops-crafted-1/mono-crafted_14.c[319,332] [2022-07-12 04:07:52,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:07:52,569 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:07:52,578 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/loops-crafted-1/mono-crafted_14.c[319,332] [2022-07-12 04:07:52,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:07:52,594 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:07:52,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52 WrapperNode [2022-07-12 04:07:52,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:07:52,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:07:52,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:07:52,596 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:07:52,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,620 INFO L137 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2022-07-12 04:07:52,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:07:52,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:07:52,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:07:52,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:07:52,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:07:52,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:07:52,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:07:52,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:07:52,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52" (1/1) ... [2022-07-12 04:07:52,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:07:52,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:07:52,675 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) [2022-07-12 04:07:52,694 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 [2022-07-12 04:07:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:07:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:07:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:07:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:07:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 04:07:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 04:07:52,747 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:07:52,748 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:07:52,820 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:07:52,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:07:52,824 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 04:07:52,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:07:52 BoogieIcfgContainer [2022-07-12 04:07:52,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:07:52,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:07:52,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:07:52,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:07:52,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:07:52" (1/3) ... [2022-07-12 04:07:52,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c6a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:07:52, skipping insertion in model container [2022-07-12 04:07:52,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:07:52" (2/3) ... [2022-07-12 04:07:52,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c6a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:07:52, skipping insertion in model container [2022-07-12 04:07:52,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:07:52" (3/3) ... [2022-07-12 04:07:52,832 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2022-07-12 04:07:52,841 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:07:52,841 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:07:52,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:07:52,875 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@38ed2aa8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@72f725d0 [2022-07-12 04:07:52,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:07:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:07:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 04:07:52,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:07:52,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:07:52,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:07:52,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:07:52,886 INFO L85 PathProgramCache]: Analyzing trace with hash 537015905, now seen corresponding path program 1 times [2022-07-12 04:07:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:07:52,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039909898] [2022-07-12 04:07:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:52,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:07:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:07:52,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:07:52,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039909898] [2022-07-12 04:07:52,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039909898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:07:52,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:07:52,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 04:07:52,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451464034] [2022-07-12 04:07:52,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:07:52,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 04:07:52,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:07:53,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 04:07:53,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:07:53,023 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:07:53,036 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2022-07-12 04:07:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 04:07:53,038 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 04:07:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:07:53,043 INFO L225 Difference]: With dead ends: 30 [2022-07-12 04:07:53,043 INFO L226 Difference]: Without dead ends: 13 [2022-07-12 04:07:53,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:07:53,048 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:07:53,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:07:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-12 04:07:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-07-12 04:07:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:07:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-07-12 04:07:53,085 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2022-07-12 04:07:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:07:53,085 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-07-12 04:07:53,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-07-12 04:07:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 04:07:53,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:07:53,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:07:53,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:07:53,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:07:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:07:53,089 INFO L85 PathProgramCache]: Analyzing trace with hash 250724395, now seen corresponding path program 1 times [2022-07-12 04:07:53,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:07:53,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753701482] [2022-07-12 04:07:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:53,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:07:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:07:53,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:07:53,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753701482] [2022-07-12 04:07:53,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753701482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:07:53,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:07:53,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 04:07:53,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113302104] [2022-07-12 04:07:53,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:07:53,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 04:07:53,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:07:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 04:07:53,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:07:53,167 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:07:53,198 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2022-07-12 04:07:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 04:07:53,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 04:07:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:07:53,199 INFO L225 Difference]: With dead ends: 26 [2022-07-12 04:07:53,200 INFO L226 Difference]: Without dead ends: 15 [2022-07-12 04:07:53,200 INFO L412 NwaCegarLoop]: 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 [2022-07-12 04:07:53,201 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:07:53,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:07:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-12 04:07:53,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-12 04:07:53,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:07:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-07-12 04:07:53,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2022-07-12 04:07:53,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:07:53,205 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-07-12 04:07:53,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-07-12 04:07:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 04:07:53,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:07:53,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:07:53,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 04:07:53,207 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:07:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:07:53,207 INFO L85 PathProgramCache]: Analyzing trace with hash 697472654, now seen corresponding path program 1 times [2022-07-12 04:07:53,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:07:53,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101158365] [2022-07-12 04:07:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:53,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:07:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:07:53,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:07:53,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101158365] [2022-07-12 04:07:53,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101158365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:07:53,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:07:53,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 04:07:53,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538303430] [2022-07-12 04:07:53,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:07:53,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 04:07:53,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:07:53,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 04:07:53,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:07:53,243 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:07:53,267 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-07-12 04:07:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 04:07:53,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 04:07:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:07:53,268 INFO L225 Difference]: With dead ends: 24 [2022-07-12 04:07:53,268 INFO L226 Difference]: Without dead ends: 16 [2022-07-12 04:07:53,269 INFO L412 NwaCegarLoop]: 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 [2022-07-12 04:07:53,270 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:07:53,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:07:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-12 04:07:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-12 04:07:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:07:53,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-12 04:07:53,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2022-07-12 04:07:53,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:07:53,273 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-12 04:07:53,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-12 04:07:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 04:07:53,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:07:53,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:07:53,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 04:07:53,274 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:07:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:07:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash 183157912, now seen corresponding path program 1 times [2022-07-12 04:07:53,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:07:53,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442142846] [2022-07-12 04:07:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:53,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:07:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:07:53,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:07:53,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442142846] [2022-07-12 04:07:53,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442142846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:07:53,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120860308] [2022-07-12 04:07:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:53,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:53,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:07:53,324 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) [2022-07-12 04:07:53,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:07:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:53,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 04:07:53,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:07:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:07:53,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:07:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:07:53,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120860308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:07:53,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:07:53,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-12 04:07:53,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972506673] [2022-07-12 04:07:53,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:07:53,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 04:07:53,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:07:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 04:07:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:07:53,473 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:53,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:07:53,515 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2022-07-12 04:07:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:07:53,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 04:07:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:07:53,517 INFO L225 Difference]: With dead ends: 33 [2022-07-12 04:07:53,518 INFO L226 Difference]: Without dead ends: 21 [2022-07-12 04:07:53,519 INFO L412 NwaCegarLoop]: 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 [2022-07-12 04:07:53,520 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:07:53,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:07:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-12 04:07:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-12 04:07:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:07:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-12 04:07:53,529 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-07-12 04:07:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:07:53,530 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-12 04:07:53,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-12 04:07:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 04:07:53,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:07:53,531 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:07:53,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 04:07:53,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:53,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:07:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:07:53,754 INFO L85 PathProgramCache]: Analyzing trace with hash -26222837, now seen corresponding path program 1 times [2022-07-12 04:07:53,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:07:53,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9458499] [2022-07-12 04:07:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:53,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:07:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:07:53,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:07:53,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9458499] [2022-07-12 04:07:53,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9458499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:07:53,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867522592] [2022-07-12 04:07:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:53,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:53,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:07:53,814 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) [2022-07-12 04:07:53,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:07:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 04:07:53,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:07:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:07:53,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:07:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:07:53,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867522592] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:07:53,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:07:53,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-12 04:07:53,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5257727] [2022-07-12 04:07:53,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:07:53,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:07:53,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:07:53,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:07:53,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:07:53,903 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:07:53,964 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-07-12 04:07:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:07:53,964 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-12 04:07:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:07:53,966 INFO L225 Difference]: With dead ends: 44 [2022-07-12 04:07:53,966 INFO L226 Difference]: Without dead ends: 29 [2022-07-12 04:07:53,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:07:53,967 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:07:53,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:07:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-12 04:07:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-12 04:07:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:07:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-07-12 04:07:53,973 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2022-07-12 04:07:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:07:53,973 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-07-12 04:07:53,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-07-12 04:07:53,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 04:07:53,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:07:53,975 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:07:53,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:07:54,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:54,176 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:07:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:07:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1794637953, now seen corresponding path program 2 times [2022-07-12 04:07:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:07:54,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118677933] [2022-07-12 04:07:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:54,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:07:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:07:54,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:07:54,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118677933] [2022-07-12 04:07:54,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118677933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:07:54,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847462451] [2022-07-12 04:07:54,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:07:54,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:54,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:07:54,254 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) [2022-07-12 04:07:54,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:07:54,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:07:54,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:07:54,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 04:07:54,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:07:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:07:54,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:07:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:07:54,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847462451] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:07:54,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:07:54,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-12 04:07:54,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575077175] [2022-07-12 04:07:54,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:07:54,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 04:07:54,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:07:54,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 04:07:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:07:54,430 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:07:54,485 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2022-07-12 04:07:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 04:07:54,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-12 04:07:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:07:54,486 INFO L225 Difference]: With dead ends: 60 [2022-07-12 04:07:54,486 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 04:07:54,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:07:54,487 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:07:54,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:07:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 04:07:54,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-12 04:07:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:07:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-07-12 04:07:54,492 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 25 [2022-07-12 04:07:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:07:54,492 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-07-12 04:07:54,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:54,493 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-07-12 04:07:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 04:07:54,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:07:54,494 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:07:54,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:07:54,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:54,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:07:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:07:54,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2939801, now seen corresponding path program 3 times [2022-07-12 04:07:54,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:07:54,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566667977] [2022-07-12 04:07:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:54,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:07:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:07:54,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:07:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566667977] [2022-07-12 04:07:54,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566667977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:07:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884202468] [2022-07-12 04:07:54,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:07:54,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:54,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:07:54,851 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) [2022-07-12 04:07:54,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:07:54,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 04:07:54,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:07:54,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:07:54,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:07:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-12 04:07:54,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:07:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-12 04:07:55,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884202468] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:07:55,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:07:55,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-07-12 04:07:55,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733794096] [2022-07-12 04:07:55,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:07:55,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 04:07:55,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:07:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 04:07:55,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:07:55,017 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:55,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:07:55,199 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2022-07-12 04:07:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 04:07:55,200 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-12 04:07:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:07:55,201 INFO L225 Difference]: With dead ends: 71 [2022-07-12 04:07:55,201 INFO L226 Difference]: Without dead ends: 56 [2022-07-12 04:07:55,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 04:07:55,202 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:07:55,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 45 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:07:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-12 04:07:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2022-07-12 04:07:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.108695652173913) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:07:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-07-12 04:07:55,208 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2022-07-12 04:07:55,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:07:55,208 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-07-12 04:07:55,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-07-12 04:07:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 04:07:55,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:07:55,210 INFO L195 NwaCegarLoop]: trace histogram [17, 15, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:07:55,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 04:07:55,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:55,423 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:07:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:07:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash 841794498, now seen corresponding path program 4 times [2022-07-12 04:07:55,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:07:55,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638862896] [2022-07-12 04:07:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:55,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:07:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:07:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:07:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638862896] [2022-07-12 04:07:55,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638862896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:07:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397130443] [2022-07-12 04:07:55,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:07:55,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:55,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:07:55,605 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) [2022-07-12 04:07:55,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:07:55,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:07:55,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:07:55,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 04:07:55,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:07:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:07:55,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:07:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:07:55,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397130443] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:07:55,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:07:55,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-07-12 04:07:55,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804065065] [2022-07-12 04:07:55,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:07:55,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 04:07:55,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:07:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 04:07:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 04:07:55,981 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:56,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:07:56,097 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2022-07-12 04:07:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 04:07:56,098 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-12 04:07:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:07:56,099 INFO L225 Difference]: With dead ends: 102 [2022-07-12 04:07:56,099 INFO L226 Difference]: Without dead ends: 84 [2022-07-12 04:07:56,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 04:07:56,100 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:07:56,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:07:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-12 04:07:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-12 04:07:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0625) internal successors, (85), 81 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:07:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-07-12 04:07:56,107 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 46 [2022-07-12 04:07:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:07:56,107 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-07-12 04:07:56,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-07-12 04:07:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 04:07:56,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:07:56,108 INFO L195 NwaCegarLoop]: trace histogram [34, 32, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:07:56,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 04:07:56,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:56,324 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:07:56,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:07:56,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1727450091, now seen corresponding path program 5 times [2022-07-12 04:07:56,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:07:56,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018423722] [2022-07-12 04:07:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:56,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:07:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:07:56,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:07:56,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018423722] [2022-07-12 04:07:56,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018423722] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:07:56,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155413497] [2022-07-12 04:07:56,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:07:56,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:56,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:07:56,825 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) [2022-07-12 04:07:56,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:07:56,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-07-12 04:07:56,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:07:56,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:07:56,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:07:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:07:56,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:07:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:07:58,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155413497] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:07:58,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:07:58,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-07-12 04:07:58,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209006476] [2022-07-12 04:07:58,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:07:58,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-12 04:07:58,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:07:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-12 04:07:58,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-07-12 04:07:58,134 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:07:58,278 INFO L93 Difference]: Finished difference Result 170 states and 212 transitions. [2022-07-12 04:07:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-12 04:07:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-12 04:07:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:07:58,280 INFO L225 Difference]: With dead ends: 170 [2022-07-12 04:07:58,280 INFO L226 Difference]: Without dead ends: 152 [2022-07-12 04:07:58,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-07-12 04:07:58,282 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:07:58,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:07:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-12 04:07:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-07-12 04:07:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 148 states have (on average 1.0337837837837838) internal successors, (153), 149 states have internal predecessors, (153), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:07:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-07-12 04:07:58,294 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 80 [2022-07-12 04:07:58,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:07:58,295 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-07-12 04:07:58,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:07:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-07-12 04:07:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-12 04:07:58,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:07:58,296 INFO L195 NwaCegarLoop]: trace histogram [68, 66, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:07:58,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 04:07:58,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:58,514 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:07:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:07:58,514 INFO L85 PathProgramCache]: Analyzing trace with hash 438683259, now seen corresponding path program 6 times [2022-07-12 04:07:58,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:07:58,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297227088] [2022-07-12 04:07:58,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:07:58,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:07:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:07:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:07:59,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:07:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297227088] [2022-07-12 04:07:59,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297227088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:07:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624261206] [2022-07-12 04:07:59,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:07:59,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:07:59,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:07:59,930 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) [2022-07-12 04:07:59,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:07:59,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 04:07:59,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:07:59,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 04:07:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:08:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-07-12 04:08:00,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:08:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4628 trivial. 0 not checked. [2022-07-12 04:08:00,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624261206] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:08:00,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:08:00,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 9, 6] total 78 [2022-07-12 04:08:00,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404810654] [2022-07-12 04:08:00,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:08:00,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-12 04:08:00,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:08:00,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-12 04:08:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2369, Invalid=3637, Unknown=0, NotChecked=0, Total=6006 [2022-07-12 04:08:00,520 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:08:02,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:08:02,499 INFO L93 Difference]: Finished difference Result 182 states and 195 transitions. [2022-07-12 04:08:02,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-12 04:08:02,499 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-07-12 04:08:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:08:02,500 INFO L225 Difference]: With dead ends: 182 [2022-07-12 04:08:02,500 INFO L226 Difference]: Without dead ends: 164 [2022-07-12 04:08:02,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7130, Invalid=14040, Unknown=0, NotChecked=0, Total=21170 [2022-07-12 04:08:02,504 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:08:02,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 103 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:08:02,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-12 04:08:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-07-12 04:08:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0389610389610389) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:08:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2022-07-12 04:08:02,515 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 148 [2022-07-12 04:08:02,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:08:02,515 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2022-07-12 04:08:02,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:08:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2022-07-12 04:08:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-12 04:08:02,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:08:02,517 INFO L195 NwaCegarLoop]: trace histogram [69, 67, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:08:02,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:08:02,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:08:02,745 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:08:02,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:08:02,746 INFO L85 PathProgramCache]: Analyzing trace with hash -376920888, now seen corresponding path program 7 times [2022-07-12 04:08:02,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:08:02,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420066864] [2022-07-12 04:08:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:08:02,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:08:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:08:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 04:08:04,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:08:04,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420066864] [2022-07-12 04:08:04,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420066864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:08:04,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885775973] [2022-07-12 04:08:04,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:08:04,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:08:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:08:04,136 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:08:04,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:08:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:08:04,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-12 04:08:04,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:08:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 04:08:04,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:08:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 04:08:08,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885775973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:08:08,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:08:08,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2022-07-12 04:08:08,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082545400] [2022-07-12 04:08:08,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:08:08,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-07-12 04:08:08,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:08:08,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-07-12 04:08:08,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-07-12 04:08:08,378 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:08:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:08:08,712 INFO L93 Difference]: Finished difference Result 322 states and 401 transitions. [2022-07-12 04:08:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-07-12 04:08:08,712 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-07-12 04:08:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:08:08,714 INFO L225 Difference]: With dead ends: 322 [2022-07-12 04:08:08,714 INFO L226 Difference]: Without dead ends: 298 [2022-07-12 04:08:08,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-07-12 04:08:08,716 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:08:08,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:08:08,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-12 04:08:08,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2022-07-12 04:08:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 292 states have (on average 1.0205479452054795) internal successors, (298), 294 states have internal predecessors, (298), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:08:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 303 transitions. [2022-07-12 04:08:08,737 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 303 transitions. Word has length 151 [2022-07-12 04:08:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:08:08,737 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 303 transitions. [2022-07-12 04:08:08,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:08:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 303 transitions. [2022-07-12 04:08:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-07-12 04:08:08,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:08:08,739 INFO L195 NwaCegarLoop]: trace histogram [138, 136, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:08:08,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:08:08,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-12 04:08:08,960 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:08:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:08:08,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2063818681, now seen corresponding path program 8 times [2022-07-12 04:08:08,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:08:08,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204258387] [2022-07-12 04:08:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:08:08,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:08:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:08:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 04:08:14,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:08:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204258387] [2022-07-12 04:08:14,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204258387] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:08:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324256441] [2022-07-12 04:08:14,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:08:14,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:08:14,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:08:14,449 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:08:14,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:08:14,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:08:14,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:08:14,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 138 conjunts are in the unsatisfiable core [2022-07-12 04:08:14,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:08:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 04:08:14,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:08:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 04:08:30,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324256441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:08:30,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:08:30,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2022-07-12 04:08:30,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178895841] [2022-07-12 04:08:30,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:08:30,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2022-07-12 04:08:30,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:08:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2022-07-12 04:08:30,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-07-12 04:08:30,740 INFO L87 Difference]: Start difference. First operand 298 states and 303 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:08:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:08:31,825 INFO L93 Difference]: Finished difference Result 598 states and 746 transitions. [2022-07-12 04:08:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-07-12 04:08:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 289 [2022-07-12 04:08:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:08:31,828 INFO L225 Difference]: With dead ends: 598 [2022-07-12 04:08:31,828 INFO L226 Difference]: Without dead ends: 574 [2022-07-12 04:08:31,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-07-12 04:08:31,848 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:08:31,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:08:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-07-12 04:08:31,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2022-07-12 04:08:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 568 states have (on average 1.0105633802816902) internal successors, (574), 570 states have internal predecessors, (574), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:08:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 579 transitions. [2022-07-12 04:08:31,872 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 579 transitions. Word has length 289 [2022-07-12 04:08:31,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:08:31,873 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 579 transitions. [2022-07-12 04:08:31,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:08:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 579 transitions. [2022-07-12 04:08:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2022-07-12 04:08:31,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:08:31,880 INFO L195 NwaCegarLoop]: trace histogram [276, 274, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:08:31,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 04:08:32,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:08:32,094 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:08:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:08:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2105112101, now seen corresponding path program 9 times [2022-07-12 04:08:32,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:08:32,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654548048] [2022-07-12 04:08:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:08:32,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:08:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:08:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 04:08:53,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:08:53,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654548048] [2022-07-12 04:08:53,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654548048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:08:53,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699049111] [2022-07-12 04:08:53,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:08:53,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:08:53,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:08:53,245 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:08:53,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:08:53,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 04:08:53,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:08:53,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:08:53,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:08:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 826 proven. 15 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-07-12 04:08:54,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:08:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 826 proven. 15 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-07-12 04:08:55,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699049111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:08:55,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:08:55,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 9, 9] total 291 [2022-07-12 04:08:55,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482785293] [2022-07-12 04:08:55,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:08:55,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 291 states [2022-07-12 04:08:55,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:08:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 291 interpolants. [2022-07-12 04:08:55,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38345, Invalid=46045, Unknown=0, NotChecked=0, Total=84390 [2022-07-12 04:08:55,453 INFO L87 Difference]: Start difference. First operand 574 states and 579 transitions. Second operand has 291 states, 291 states have (on average 2.013745704467354) internal successors, (586), 291 states have internal predecessors, (586), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:09:21,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:09:21,328 INFO L93 Difference]: Finished difference Result 614 states and 636 transitions. [2022-07-12 04:09:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2022-07-12 04:09:21,329 INFO L78 Accepts]: Start accepts. Automaton has has 291 states, 291 states have (on average 2.013745704467354) internal successors, (586), 291 states have internal predecessors, (586), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 565 [2022-07-12 04:09:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:09:21,332 INFO L225 Difference]: With dead ends: 614 [2022-07-12 04:09:21,332 INFO L226 Difference]: Without dead ends: 590 [2022-07-12 04:09:21,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1680 GetRequests, 1116 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41830 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=117820, Invalid=201970, Unknown=0, NotChecked=0, Total=319790 [2022-07-12 04:09:21,347 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 558 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:09:21,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 135 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:09:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-07-12 04:09:21,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 584. [2022-07-12 04:09:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 578 states have (on average 1.0103806228373702) internal successors, (584), 580 states have internal predecessors, (584), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:09:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 589 transitions. [2022-07-12 04:09:21,365 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 589 transitions. Word has length 565 [2022-07-12 04:09:21,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:09:21,366 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 589 transitions. [2022-07-12 04:09:21,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 291 states, 291 states have (on average 2.013745704467354) internal successors, (586), 291 states have internal predecessors, (586), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:09:21,366 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 589 transitions. [2022-07-12 04:09:21,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-07-12 04:09:21,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:09:21,371 INFO L195 NwaCegarLoop]: trace histogram [277, 275, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:09:21,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-12 04:09:21,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 04:09:21,584 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:09:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:09:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1558426456, now seen corresponding path program 10 times [2022-07-12 04:09:21,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:09:21,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153923236] [2022-07-12 04:09:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:09:21,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:09:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:09:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 76820 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-12 04:09:43,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:09:43,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153923236] [2022-07-12 04:09:43,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153923236] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:09:43,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566857533] [2022-07-12 04:09:43,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:09:43,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:09:43,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:09:43,170 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:09:43,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:09:43,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:09:43,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:09:43,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 277 conjunts are in the unsatisfiable core [2022-07-12 04:09:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:09:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 76820 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-12 04:09:44,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:10:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 76820 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-12 04:10:49,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566857533] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:10:49,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:10:49,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2022-07-12 04:10:49,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616140465] [2022-07-12 04:10:49,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:10:49,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2022-07-12 04:10:49,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:10:49,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2022-07-12 04:10:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2022-07-12 04:10:49,124 INFO L87 Difference]: Start difference. First operand 584 states and 589 transitions. Second operand has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:10:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:10:57,614 INFO L93 Difference]: Finished difference Result 1170 states and 1457 transitions. [2022-07-12 04:10:57,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2022-07-12 04:10:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 575 [2022-07-12 04:10:57,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:10:57,620 INFO L225 Difference]: With dead ends: 1170 [2022-07-12 04:10:57,621 INFO L226 Difference]: Without dead ends: 1138 [2022-07-12 04:10:57,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1426 GetRequests, 873 SyntacticMatches, 0 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 85.4s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2022-07-12 04:10:57,640 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 04:10:57,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 04:10:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-07-12 04:10:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2022-07-12 04:10:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1132 states have (on average 1.0053003533568905) internal successors, (1138), 1134 states have internal predecessors, (1138), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:10:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1143 transitions. [2022-07-12 04:10:57,696 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1143 transitions. Word has length 575 [2022-07-12 04:10:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:10:57,697 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 1143 transitions. [2022-07-12 04:10:57,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:10:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1143 transitions. [2022-07-12 04:10:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1130 [2022-07-12 04:10:57,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:10:57,710 INFO L195 NwaCegarLoop]: trace histogram [554, 552, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:10:57,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:10:57,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 04:10:57,923 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:10:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:10:57,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1319110873, now seen corresponding path program 11 times [2022-07-12 04:10:57,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:10:57,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647433350] [2022-07-12 04:10:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:10:57,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:10:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat