./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/in-de42.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 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:45:34,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:45:34,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:45:34,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:45:34,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:45:34,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:45:34,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:45:34,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:45:34,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:45:34,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:45:34,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:45:34,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:45:34,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:45:34,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:45:34,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:45:34,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:45:34,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:45:34,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:45:34,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:45:34,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:45:34,688 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:45:34,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:45:34,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:45:34,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:45:34,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:45:34,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:45:34,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:45:34,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:45:34,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:45:34,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:45:34,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:45:34,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:45:34,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:45:34,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:45:34,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:45:34,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:45:34,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:45:34,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:45:34,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:45:34,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:45:34,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:45:34,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:45:34,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:45:34,735 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:45:34,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:45:34,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:45:34,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:45:34,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:45:34,737 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:45:34,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:45:34,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:45:34,738 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:45:34,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:45:34,740 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:45:34,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:45:34,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:45:34,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:45:34,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:45:34,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:45:34,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:45:34,741 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:45:34,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:45:34,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:45:34,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:45:34,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:45:34,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:45:34,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:45:34,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:45:34,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:45:34,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:45:34,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:45:34,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:45:34,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:45:34,745 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:45:34,745 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:45:34,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:45:34,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 [2022-07-13 15:45:34,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:45:35,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:45:35,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:45:35,008 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:45:35,011 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:45:35,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de42.c [2022-07-13 15:45:35,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a2825a41/16caf49caf3a48b597adb5f3fa2ed8b7/FLAGdd0f2b3d5 [2022-07-13 15:45:35,453 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:45:35,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de42.c [2022-07-13 15:45:35,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a2825a41/16caf49caf3a48b597adb5f3fa2ed8b7/FLAGdd0f2b3d5 [2022-07-13 15:45:35,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a2825a41/16caf49caf3a48b597adb5f3fa2ed8b7 [2022-07-13 15:45:35,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:45:35,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:45:35,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:45:35,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:45:35,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:45:35,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50f80919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35, skipping insertion in model container [2022-07-13 15:45:35,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:45:35,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:45:35,616 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/in-de42.c[368,381] [2022-07-13 15:45:35,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:45:35,636 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:45:35,645 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/in-de42.c[368,381] [2022-07-13 15:45:35,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:45:35,658 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:45:35,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35 WrapperNode [2022-07-13 15:45:35,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:45:35,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:45:35,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:45:35,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:45:35,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,692 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-07-13 15:45:35,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:45:35,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:45:35,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:45:35,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:45:35,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:45:35,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:45:35,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:45:35,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:45:35,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35" (1/1) ... [2022-07-13 15:45:35,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:45:35,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:35,742 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) [2022-07-13 15:45:35,746 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 [2022-07-13 15:45:35,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:45:35,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:45:35,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:45:35,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:45:35,814 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:45:35,815 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:45:35,908 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:45:35,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:45:35,913 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 15:45:35,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:45:35 BoogieIcfgContainer [2022-07-13 15:45:35,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:45:35,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:45:35,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:45:35,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:45:35,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:45:35" (1/3) ... [2022-07-13 15:45:35,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1328eee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:45:35, skipping insertion in model container [2022-07-13 15:45:35,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:45:35" (2/3) ... [2022-07-13 15:45:35,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1328eee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:45:35, skipping insertion in model container [2022-07-13 15:45:35,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:45:35" (3/3) ... [2022-07-13 15:45:35,937 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de42.c [2022-07-13 15:45:35,948 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:45:35,983 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:45:36,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:45:36,035 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@55106f81, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@224e40d0 [2022-07-13 15:45:36,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:45:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 15:45:36,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:36,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:36,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2022-07-13 15:45:36,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:36,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991298562] [2022-07-13 15:45:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:36,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:36,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:36,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991298562] [2022-07-13 15:45:36,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991298562] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:45:36,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:45:36,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:45:36,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726563963] [2022-07-13 15:45:36,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:45:36,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:45:36,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:36,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:45:36,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:45:36,250 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:36,265 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2022-07-13 15:45:36,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:45:36,267 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 15:45:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:36,274 INFO L225 Difference]: With dead ends: 27 [2022-07-13 15:45:36,274 INFO L226 Difference]: Without dead ends: 11 [2022-07-13 15:45:36,278 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 [2022-07-13 15:45:36,283 INFO L413 NwaCegarLoop]: 18 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, 18 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 [2022-07-13 15:45:36,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:45:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-13 15:45:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-13 15:45:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-07-13 15:45:36,312 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2022-07-13 15:45:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:36,312 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-07-13 15:45:36,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-07-13 15:45:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 15:45:36,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:36,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:36,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:45:36,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:36,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2022-07-13 15:45:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:36,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604104539] [2022-07-13 15:45:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:36,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:36,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:36,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604104539] [2022-07-13 15:45:36,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604104539] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:45:36,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:45:36,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 15:45:36,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107084402] [2022-07-13 15:45:36,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:45:36,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 15:45:36,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:36,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 15:45:36,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:45:36,697 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:36,826 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-07-13 15:45:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:45:36,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 15:45:36,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:36,827 INFO L225 Difference]: With dead ends: 29 [2022-07-13 15:45:36,827 INFO L226 Difference]: Without dead ends: 21 [2022-07-13 15:45:36,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-07-13 15:45:36,829 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:36,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:45:36,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-13 15:45:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2022-07-13 15:45:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-07-13 15:45:36,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 10 [2022-07-13 15:45:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:36,834 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-07-13 15:45:36,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-07-13 15:45:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 15:45:36,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:36,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:36,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 15:45:36,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:36,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:36,836 INFO L85 PathProgramCache]: Analyzing trace with hash 105287507, now seen corresponding path program 1 times [2022-07-13 15:45:36,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:36,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987881631] [2022-07-13 15:45:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:36,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:36,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:36,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987881631] [2022-07-13 15:45:36,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987881631] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:45:36,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:45:36,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 15:45:36,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268452762] [2022-07-13 15:45:36,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:45:36,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 15:45:36,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:36,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 15:45:36,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:45:36,867 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:36,876 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2022-07-13 15:45:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 15:45:36,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 15:45:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:36,877 INFO L225 Difference]: With dead ends: 30 [2022-07-13 15:45:36,877 INFO L226 Difference]: Without dead ends: 21 [2022-07-13 15:45:36,878 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 [2022-07-13 15:45:36,879 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:36,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:45:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-13 15:45:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2022-07-13 15:45:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-07-13 15:45:36,883 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 11 [2022-07-13 15:45:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:36,884 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-07-13 15:45:36,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-07-13 15:45:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 15:45:36,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:36,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:36,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 15:45:36,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:36,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:36,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1508115906, now seen corresponding path program 1 times [2022-07-13 15:45:36,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:36,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606701619] [2022-07-13 15:45:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:36,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:36,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:36,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606701619] [2022-07-13 15:45:36,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606701619] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:45:36,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:45:36,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 15:45:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395247496] [2022-07-13 15:45:36,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:45:36,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 15:45:36,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:36,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 15:45:36,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 15:45:36,917 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:36,936 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2022-07-13 15:45:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 15:45:36,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 15:45:36,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:36,937 INFO L225 Difference]: With dead ends: 21 [2022-07-13 15:45:36,937 INFO L226 Difference]: Without dead ends: 12 [2022-07-13 15:45:36,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:45:36,939 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:36,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:45:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-13 15:45:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-13 15:45:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-07-13 15:45:36,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 11 [2022-07-13 15:45:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:36,943 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-07-13 15:45:36,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:36,943 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-07-13 15:45:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 15:45:36,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:36,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:36,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 15:45:36,944 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2022-07-13 15:45:36,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:36,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506363756] [2022-07-13 15:45:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:36,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:36,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506363756] [2022-07-13 15:45:36,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506363756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803275551] [2022-07-13 15:45:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:36,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:36,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:37,003 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) [2022-07-13 15:45:37,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:45:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:37,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 15:45:37,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:37,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:37,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803275551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:37,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:37,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-13 15:45:37,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277596554] [2022-07-13 15:45:37,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:37,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 15:45:37,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:37,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 15:45:37,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:45:37,186 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:37,315 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2022-07-13 15:45:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 15:45:37,315 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 15:45:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:37,319 INFO L225 Difference]: With dead ends: 40 [2022-07-13 15:45:37,321 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 15:45:37,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-13 15:45:37,325 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:37,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 41 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:45:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 15:45:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2022-07-13 15:45:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-07-13 15:45:37,341 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2022-07-13 15:45:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:37,341 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-07-13 15:45:37,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-07-13 15:45:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 15:45:37,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:37,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:37,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:45:37,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:37,560 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2022-07-13 15:45:37,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:37,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780147598] [2022-07-13 15:45:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:37,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:45:37,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780147598] [2022-07-13 15:45:37,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780147598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17660477] [2022-07-13 15:45:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:37,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:37,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:37,643 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) [2022-07-13 15:45:37,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:45:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 15:45:37,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:45:37,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:45:37,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17660477] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:37,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:37,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-07-13 15:45:37,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087753137] [2022-07-13 15:45:37,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:37,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 15:45:37,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:37,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 15:45:37,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 15:45:37,764 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:37,787 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-07-13 15:45:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 15:45:37,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-13 15:45:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:37,788 INFO L225 Difference]: With dead ends: 39 [2022-07-13 15:45:37,789 INFO L226 Difference]: Without dead ends: 35 [2022-07-13 15:45:37,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 15:45:37,790 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:37,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:45:37,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-13 15:45:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-07-13 15:45:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2022-07-13 15:45:37,797 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 13 [2022-07-13 15:45:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:37,797 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2022-07-13 15:45:37,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2022-07-13 15:45:37,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 15:45:37,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:37,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:37,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:45:38,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-13 15:45:38,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2022-07-13 15:45:38,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:38,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670434537] [2022-07-13 15:45:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:38,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:38,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:38,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670434537] [2022-07-13 15:45:38,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670434537] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:38,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793429472] [2022-07-13 15:45:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:38,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:38,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:38,324 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) [2022-07-13 15:45:38,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:45:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:38,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 15:45:38,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:38,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:38,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793429472] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:38,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:38,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-07-13 15:45:38,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724364670] [2022-07-13 15:45:38,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:38,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 15:45:38,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 15:45:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-07-13 15:45:38,964 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:39,597 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-07-13 15:45:39,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 15:45:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-13 15:45:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:39,598 INFO L225 Difference]: With dead ends: 44 [2022-07-13 15:45:39,598 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 15:45:39,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-07-13 15:45:39,599 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:39,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 55 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:45:39,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 15:45:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-07-13 15:45:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-07-13 15:45:39,605 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2022-07-13 15:45:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:39,605 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-07-13 15:45:39,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-07-13 15:45:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 15:45:39,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:39,606 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:39,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 15:45:39,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:39,818 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:39,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:39,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 2 times [2022-07-13 15:45:39,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:39,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385981553] [2022-07-13 15:45:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:39,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:39,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385981553] [2022-07-13 15:45:39,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385981553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379898715] [2022-07-13 15:45:39,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:45:39,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:39,914 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) [2022-07-13 15:45:39,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:45:39,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:45:39,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:45:39,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 15:45:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:39,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:40,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379898715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:40,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:40,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-07-13 15:45:40,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268310137] [2022-07-13 15:45:40,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:40,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 15:45:40,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:40,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 15:45:40,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-13 15:45:40,075 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:40,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:40,738 INFO L93 Difference]: Finished difference Result 107 states and 172 transitions. [2022-07-13 15:45:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 15:45:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-13 15:45:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:40,740 INFO L225 Difference]: With dead ends: 107 [2022-07-13 15:45:40,740 INFO L226 Difference]: Without dead ends: 99 [2022-07-13 15:45:40,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-07-13 15:45:40,741 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 147 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:40,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 96 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:45:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-13 15:45:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2022-07-13 15:45:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 57 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2022-07-13 15:45:40,755 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 14 [2022-07-13 15:45:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:40,755 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2022-07-13 15:45:40,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2022-07-13 15:45:40,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 15:45:40,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:40,757 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:40,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 15:45:40,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:40,980 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash -555035246, now seen corresponding path program 2 times [2022-07-13 15:45:40,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:40,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475889083] [2022-07-13 15:45:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:40,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:45:41,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:41,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475889083] [2022-07-13 15:45:41,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475889083] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:41,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005889540] [2022-07-13 15:45:41,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:45:41,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:41,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:41,032 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) [2022-07-13 15:45:41,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 15:45:41,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:45:41,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:45:41,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 15:45:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:45:41,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:45:41,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005889540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:41,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:41,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-07-13 15:45:41,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064693434] [2022-07-13 15:45:41,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:41,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 15:45:41,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:41,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 15:45:41,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 15:45:41,131 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:41,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:41,157 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-07-13 15:45:41,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 15:45:41,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-13 15:45:41,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:41,159 INFO L225 Difference]: With dead ends: 66 [2022-07-13 15:45:41,159 INFO L226 Difference]: Without dead ends: 54 [2022-07-13 15:45:41,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 15:45:41,162 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:41,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:45:41,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-13 15:45:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-13 15:45:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 53 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2022-07-13 15:45:41,187 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 15 [2022-07-13 15:45:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:41,187 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2022-07-13 15:45:41,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2022-07-13 15:45:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 15:45:41,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:41,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:41,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 15:45:41,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:41,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 3 times [2022-07-13 15:45:41,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669417001] [2022-07-13 15:45:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:41,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:45:41,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:41,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669417001] [2022-07-13 15:45:41,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669417001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:41,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732938868] [2022-07-13 15:45:41,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:45:41,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:41,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:41,467 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) [2022-07-13 15:45:41,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 15:45:41,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 15:45:41,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:45:41,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 15:45:41,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:45:41,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:45:41,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732938868] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:41,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:41,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-07-13 15:45:41,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587464709] [2022-07-13 15:45:41,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:41,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 15:45:41,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:41,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 15:45:41,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-13 15:45:41,614 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:41,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:41,751 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2022-07-13 15:45:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 15:45:41,752 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-13 15:45:41,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:41,752 INFO L225 Difference]: With dead ends: 86 [2022-07-13 15:45:41,752 INFO L226 Difference]: Without dead ends: 70 [2022-07-13 15:45:41,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-07-13 15:45:41,753 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:41,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 64 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:45:41,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-13 15:45:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2022-07-13 15:45:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2022-07-13 15:45:41,765 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 16 [2022-07-13 15:45:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:41,765 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2022-07-13 15:45:41,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2022-07-13 15:45:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 15:45:41,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:41,768 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:41,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 15:45:41,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:41,983 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:41,984 INFO L85 PathProgramCache]: Analyzing trace with hash 720326044, now seen corresponding path program 2 times [2022-07-13 15:45:41,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:41,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359662206] [2022-07-13 15:45:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:41,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:45:42,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:42,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359662206] [2022-07-13 15:45:42,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359662206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:42,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748362632] [2022-07-13 15:45:42,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:45:42,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:42,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:42,055 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) [2022-07-13 15:45:42,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 15:45:42,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:45:42,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:45:42,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 15:45:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:45:42,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:45:42,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748362632] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:42,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:42,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-07-13 15:45:42,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428354948] [2022-07-13 15:45:42,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:42,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 15:45:42,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:42,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 15:45:42,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:45:42,185 INFO L87 Difference]: Start difference. First operand 52 states and 72 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:42,233 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2022-07-13 15:45:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:45:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-13 15:45:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:42,235 INFO L225 Difference]: With dead ends: 71 [2022-07-13 15:45:42,235 INFO L226 Difference]: Without dead ends: 67 [2022-07-13 15:45:42,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:45:42,236 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:42,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 47 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:45:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-13 15:45:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-07-13 15:45:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.40625) internal successors, (90), 64 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2022-07-13 15:45:42,254 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 16 [2022-07-13 15:45:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:42,254 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2022-07-13 15:45:42,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2022-07-13 15:45:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 15:45:42,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:42,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:42,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 15:45:42,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:42,471 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 4 times [2022-07-13 15:45:42,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:42,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938464538] [2022-07-13 15:45:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:42,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:42,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:42,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938464538] [2022-07-13 15:45:42,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938464538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:42,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918427890] [2022-07-13 15:45:42,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:45:42,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:42,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:42,792 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) [2022-07-13 15:45:42,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 15:45:42,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:45:42,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:45:42,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 15:45:42,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:43,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:44,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918427890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:44,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:44,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 32 [2022-07-13 15:45:44,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016482150] [2022-07-13 15:45:44,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:44,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 15:45:44,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:44,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 15:45:44,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-07-13 15:45:44,149 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:45,440 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2022-07-13 15:45:45,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 15:45:45,441 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-13 15:45:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:45,441 INFO L225 Difference]: With dead ends: 83 [2022-07-13 15:45:45,441 INFO L226 Difference]: Without dead ends: 71 [2022-07-13 15:45:45,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=192, Invalid=1448, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 15:45:45,443 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:45,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 101 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 15:45:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-13 15:45:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-07-13 15:45:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 90 transitions. [2022-07-13 15:45:45,452 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 90 transitions. Word has length 18 [2022-07-13 15:45:45,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:45,452 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 90 transitions. [2022-07-13 15:45:45,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 90 transitions. [2022-07-13 15:45:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 15:45:45,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:45,453 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:45,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 15:45:45,654 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,SelfDestructingSolverStorable11 [2022-07-13 15:45:45,654 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:45,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash 469660332, now seen corresponding path program 5 times [2022-07-13 15:45:45,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:45,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707933551] [2022-07-13 15:45:45,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:45,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:45:45,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:45,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707933551] [2022-07-13 15:45:45,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707933551] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:45,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054395915] [2022-07-13 15:45:45,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:45:45,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:45,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:45,748 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) [2022-07-13 15:45:45,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 15:45:45,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 15:45:45,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:45:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 15:45:45,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:45:45,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:45:45,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054395915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:45,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:45,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-13 15:45:45,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81329987] [2022-07-13 15:45:45,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:45,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 15:45:45,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:45,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 15:45:45,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-13 15:45:45,963 INFO L87 Difference]: Start difference. First operand 67 states and 90 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:48,141 INFO L93 Difference]: Finished difference Result 173 states and 253 transitions. [2022-07-13 15:45:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-13 15:45:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-13 15:45:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:48,142 INFO L225 Difference]: With dead ends: 173 [2022-07-13 15:45:48,142 INFO L226 Difference]: Without dead ends: 152 [2022-07-13 15:45:48,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 15:45:48,145 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 199 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:48,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 166 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 15:45:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-13 15:45:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 86. [2022-07-13 15:45:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.3647058823529412) internal successors, (116), 85 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 116 transitions. [2022-07-13 15:45:48,163 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 116 transitions. Word has length 18 [2022-07-13 15:45:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:48,163 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 116 transitions. [2022-07-13 15:45:48,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 116 transitions. [2022-07-13 15:45:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 15:45:48,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:48,164 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:48,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 15:45:48,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 15:45:48,375 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1064653150, now seen corresponding path program 6 times [2022-07-13 15:45:48,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:48,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492699505] [2022-07-13 15:45:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:48,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:45:48,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:48,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492699505] [2022-07-13 15:45:48,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492699505] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:48,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013705171] [2022-07-13 15:45:48,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:45:48,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:48,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:48,444 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) [2022-07-13 15:45:48,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 15:45:48,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 15:45:48,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:45:48,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 15:45:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:45:48,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:45:48,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013705171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:48,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:48,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-13 15:45:48,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235158702] [2022-07-13 15:45:48,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:48,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:45:48,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:48,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:45:48,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:45:48,533 INFO L87 Difference]: Start difference. First operand 86 states and 116 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:48,561 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2022-07-13 15:45:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:45:48,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-13 15:45:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:48,562 INFO L225 Difference]: With dead ends: 94 [2022-07-13 15:45:48,562 INFO L226 Difference]: Without dead ends: 79 [2022-07-13 15:45:48,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:45:48,563 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:48,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:45:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-13 15:45:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-07-13 15:45:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.394736842105263) internal successors, (106), 76 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 106 transitions. [2022-07-13 15:45:48,575 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 106 transitions. Word has length 19 [2022-07-13 15:45:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:48,576 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 106 transitions. [2022-07-13 15:45:48,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 106 transitions. [2022-07-13 15:45:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 15:45:48,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:48,577 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:48,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 15:45:48,799 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,SelfDestructingSolverStorable13 [2022-07-13 15:45:48,799 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:48,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1610400402, now seen corresponding path program 3 times [2022-07-13 15:45:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:48,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147081602] [2022-07-13 15:45:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:45:48,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147081602] [2022-07-13 15:45:48,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147081602] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544181242] [2022-07-13 15:45:48,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:45:48,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:48,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:48,870 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) [2022-07-13 15:45:48,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 15:45:48,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 15:45:48,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:45:48,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 15:45:48,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:45:48,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:45:48,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544181242] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:48,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:48,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-07-13 15:45:48,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653904569] [2022-07-13 15:45:48,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:48,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 15:45:48,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 15:45:48,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-13 15:45:48,996 INFO L87 Difference]: Start difference. First operand 77 states and 106 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:49,080 INFO L93 Difference]: Finished difference Result 101 states and 142 transitions. [2022-07-13 15:45:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 15:45:49,080 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-13 15:45:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:49,081 INFO L225 Difference]: With dead ends: 101 [2022-07-13 15:45:49,081 INFO L226 Difference]: Without dead ends: 97 [2022-07-13 15:45:49,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-13 15:45:49,082 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:49,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 95 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:45:49,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-13 15:45:49,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2022-07-13 15:45:49,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 93 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:49,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2022-07-13 15:45:49,102 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 19 [2022-07-13 15:45:49,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:49,103 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2022-07-13 15:45:49,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:49,103 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2022-07-13 15:45:49,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 15:45:49,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:49,104 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:49,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-13 15:45:49,304 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,SelfDestructingSolverStorable14 [2022-07-13 15:45:49,304 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:49,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 7 times [2022-07-13 15:45:49,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:49,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135729369] [2022-07-13 15:45:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:49,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 15:45:49,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135729369] [2022-07-13 15:45:49,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135729369] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440485113] [2022-07-13 15:45:49,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:45:49,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:49,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:49,389 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:45:49,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 15:45:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:49,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 15:45:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 15:45:49,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 15:45:49,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440485113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:49,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:49,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-13 15:45:49,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37745745] [2022-07-13 15:45:49,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:49,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 15:45:49,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:49,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 15:45:49,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-13 15:45:49,585 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:49,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:45:49,903 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-07-13 15:45:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 15:45:49,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-13 15:45:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:45:49,905 INFO L225 Difference]: With dead ends: 144 [2022-07-13 15:45:49,905 INFO L226 Difference]: Without dead ends: 127 [2022-07-13 15:45:49,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-07-13 15:45:49,906 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:45:49,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 96 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:45:49,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-13 15:45:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2022-07-13 15:45:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3777777777777778) internal successors, (124), 90 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2022-07-13 15:45:49,920 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 20 [2022-07-13 15:45:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:45:49,921 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2022-07-13 15:45:49,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:45:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2022-07-13 15:45:49,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 15:45:49,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:45:49,922 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:45:49,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 15:45:50,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 15:45:50,135 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:45:50,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:45:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash 401524257, now seen corresponding path program 3 times [2022-07-13 15:45:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:45:50,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743483652] [2022-07-13 15:45:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:45:50,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:45:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:45:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:50,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:45:50,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743483652] [2022-07-13 15:45:50,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743483652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:45:50,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648870996] [2022-07-13 15:45:50,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:45:50,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:45:50,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:45:50,311 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:45:50,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 15:45:50,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-13 15:45:50,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:45:50,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 15:45:50,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:45:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:50,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:45:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:45:50,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648870996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:45:50,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:45:50,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2022-07-13 15:45:50,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356649093] [2022-07-13 15:45:50,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:45:50,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 15:45:50,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:45:50,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 15:45:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2022-07-13 15:45:50,736 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:46:04,313 INFO L93 Difference]: Finished difference Result 399 states and 608 transitions. [2022-07-13 15:46:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 15:46:04,313 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-13 15:46:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:46:04,315 INFO L225 Difference]: With dead ends: 399 [2022-07-13 15:46:04,315 INFO L226 Difference]: Without dead ends: 365 [2022-07-13 15:46:04,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=811, Invalid=1541, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 15:46:04,317 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 705 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:46:04,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 405 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 15:46:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-13 15:46:04,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 141. [2022-07-13 15:46:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.3785714285714286) internal successors, (193), 140 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2022-07-13 15:46:04,347 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 21 [2022-07-13 15:46:04,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:46:04,347 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2022-07-13 15:46:04,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:04,347 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2022-07-13 15:46:04,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 15:46:04,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:46:04,348 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:46:04,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 15:46:04,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 15:46:04,553 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:46:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:46:04,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 8 times [2022-07-13 15:46:04,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:46:04,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738815107] [2022-07-13 15:46:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:46:04,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:46:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:46:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:46:04,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:46:04,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738815107] [2022-07-13 15:46:04,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738815107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:46:04,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971387559] [2022-07-13 15:46:04,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:46:04,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:04,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:46:04,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:46:04,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 15:46:04,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:46:04,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:46:04,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 15:46:04,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:46:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:46:05,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:46:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:46:05,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971387559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:46:05,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:46:05,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-13 15:46:05,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980640784] [2022-07-13 15:46:05,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:46:05,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 15:46:05,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:46:05,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 15:46:05,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 15:46:05,701 INFO L87 Difference]: Start difference. First operand 141 states and 193 transitions. Second operand has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:46:06,650 INFO L93 Difference]: Finished difference Result 162 states and 216 transitions. [2022-07-13 15:46:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 15:46:06,650 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-13 15:46:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:46:06,651 INFO L225 Difference]: With dead ends: 162 [2022-07-13 15:46:06,651 INFO L226 Difference]: Without dead ends: 148 [2022-07-13 15:46:06,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 15:46:06,653 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:46:06,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 104 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:46:06,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-13 15:46:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2022-07-13 15:46:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.3591549295774648) internal successors, (193), 142 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 193 transitions. [2022-07-13 15:46:06,688 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 193 transitions. Word has length 22 [2022-07-13 15:46:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:46:06,689 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 193 transitions. [2022-07-13 15:46:06,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 193 transitions. [2022-07-13 15:46:06,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 15:46:06,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:46:06,690 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:46:06,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 15:46:06,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:06,890 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:46:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:46:06,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1894811100, now seen corresponding path program 4 times [2022-07-13 15:46:06,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:46:06,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125105393] [2022-07-13 15:46:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:46:06,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:46:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:46:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 15:46:06,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:46:06,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125105393] [2022-07-13 15:46:06,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125105393] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:46:06,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852158606] [2022-07-13 15:46:06,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:46:06,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:06,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:46:06,984 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:46:06,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 15:46:07,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:46:07,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:46:07,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 15:46:07,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:46:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 15:46:07,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:46:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 15:46:07,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852158606] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:46:07,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:46:07,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2022-07-13 15:46:07,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97595770] [2022-07-13 15:46:07,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:46:07,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 15:46:07,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:46:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 15:46:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 15:46:07,126 INFO L87 Difference]: Start difference. First operand 143 states and 193 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:07,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:46:07,254 INFO L93 Difference]: Finished difference Result 182 states and 250 transitions. [2022-07-13 15:46:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 15:46:07,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-13 15:46:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:46:07,256 INFO L225 Difference]: With dead ends: 182 [2022-07-13 15:46:07,256 INFO L226 Difference]: Without dead ends: 178 [2022-07-13 15:46:07,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 15:46:07,257 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:46:07,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 98 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:46:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-13 15:46:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 163. [2022-07-13 15:46:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.382716049382716) internal successors, (224), 162 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 224 transitions. [2022-07-13 15:46:07,300 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 224 transitions. Word has length 22 [2022-07-13 15:46:07,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:46:07,301 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 224 transitions. [2022-07-13 15:46:07,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 224 transitions. [2022-07-13 15:46:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 15:46:07,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:46:07,302 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:46:07,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 15:46:07,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:07,511 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:46:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:46:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1482516206, now seen corresponding path program 9 times [2022-07-13 15:46:07,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:46:07,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567557246] [2022-07-13 15:46:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:46:07,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:46:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:46:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 15:46:07,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:46:07,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567557246] [2022-07-13 15:46:07,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567557246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:46:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092016801] [2022-07-13 15:46:07,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:46:07,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:07,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:46:07,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:46:07,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 15:46:07,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 15:46:07,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:46:07,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 15:46:07,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:46:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 15:46:07,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:46:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 15:46:07,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092016801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:46:07,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:46:07,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-07-13 15:46:07,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128104484] [2022-07-13 15:46:07,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:46:07,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:46:07,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:46:07,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:46:07,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:46:07,691 INFO L87 Difference]: Start difference. First operand 163 states and 224 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:46:07,753 INFO L93 Difference]: Finished difference Result 180 states and 242 transitions. [2022-07-13 15:46:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:46:07,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-13 15:46:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:46:07,754 INFO L225 Difference]: With dead ends: 180 [2022-07-13 15:46:07,755 INFO L226 Difference]: Without dead ends: 162 [2022-07-13 15:46:07,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:46:07,755 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:46:07,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:46:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-13 15:46:07,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2022-07-13 15:46:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.3860759493670887) internal successors, (219), 158 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 219 transitions. [2022-07-13 15:46:07,789 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 219 transitions. Word has length 23 [2022-07-13 15:46:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:46:07,789 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 219 transitions. [2022-07-13 15:46:07,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 219 transitions. [2022-07-13 15:46:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 15:46:07,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:46:07,790 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:46:07,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 15:46:08,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:08,003 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:46:08,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:46:08,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1912260034, now seen corresponding path program 5 times [2022-07-13 15:46:08,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:46:08,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506127703] [2022-07-13 15:46:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:46:08,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:46:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:46:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 15:46:08,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:46:08,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506127703] [2022-07-13 15:46:08,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506127703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:46:08,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781732938] [2022-07-13 15:46:08,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:46:08,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:08,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:46:08,116 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:46:08,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 15:46:08,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 15:46:08,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:46:08,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 15:46:08,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:46:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 15:46:08,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:46:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 15:46:08,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781732938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:46:08,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:46:08,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-07-13 15:46:08,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411023828] [2022-07-13 15:46:08,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:46:08,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 15:46:08,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:46:08,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 15:46:08,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-07-13 15:46:08,594 INFO L87 Difference]: Start difference. First operand 159 states and 219 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:46:09,219 INFO L93 Difference]: Finished difference Result 289 states and 365 transitions. [2022-07-13 15:46:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 15:46:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-13 15:46:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:46:09,220 INFO L225 Difference]: With dead ends: 289 [2022-07-13 15:46:09,221 INFO L226 Difference]: Without dead ends: 269 [2022-07-13 15:46:09,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 15:46:09,222 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 178 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:46:09,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 128 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:46:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-13 15:46:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 173. [2022-07-13 15:46:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4069767441860466) internal successors, (242), 172 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 242 transitions. [2022-07-13 15:46:09,263 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 242 transitions. Word has length 23 [2022-07-13 15:46:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:46:09,263 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 242 transitions. [2022-07-13 15:46:09,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 242 transitions. [2022-07-13 15:46:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 15:46:09,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:46:09,264 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:46:09,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 15:46:09,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:09,469 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:46:09,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:46:09,469 INFO L85 PathProgramCache]: Analyzing trace with hash 418509715, now seen corresponding path program 1 times [2022-07-13 15:46:09,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:46:09,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417394164] [2022-07-13 15:46:09,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:46:09,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:46:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:46:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:46:09,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:46:09,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417394164] [2022-07-13 15:46:09,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417394164] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:46:09,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180638918] [2022-07-13 15:46:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:46:09,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:09,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:46:09,657 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:46:09,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 15:46:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:46:09,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 15:46:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:46:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:46:09,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:46:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:46:10,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180638918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:46:10,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:46:10,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-07-13 15:46:10,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880046868] [2022-07-13 15:46:10,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:46:10,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 15:46:10,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:46:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 15:46:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2022-07-13 15:46:10,037 INFO L87 Difference]: Start difference. First operand 173 states and 242 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:46:47,252 INFO L93 Difference]: Finished difference Result 548 states and 838 transitions. [2022-07-13 15:46:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-13 15:46:47,253 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-13 15:46:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:46:47,255 INFO L225 Difference]: With dead ends: 548 [2022-07-13 15:46:47,255 INFO L226 Difference]: Without dead ends: 520 [2022-07-13 15:46:47,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=1802, Invalid=4050, Unknown=0, NotChecked=0, Total=5852 [2022-07-13 15:46:47,257 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 811 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:46:47,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 338 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 15:46:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-07-13 15:46:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 184. [2022-07-13 15:46:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.4043715846994536) internal successors, (257), 183 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 257 transitions. [2022-07-13 15:46:47,293 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 257 transitions. Word has length 23 [2022-07-13 15:46:47,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:46:47,293 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 257 transitions. [2022-07-13 15:46:47,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 257 transitions. [2022-07-13 15:46:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 15:46:47,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:46:47,294 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:46:47,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 15:46:47,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:47,495 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:46:47,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:46:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash -510369070, now seen corresponding path program 6 times [2022-07-13 15:46:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:46:47,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61488443] [2022-07-13 15:46:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:46:47,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:46:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:46:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 15:46:47,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:46:47,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61488443] [2022-07-13 15:46:47,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61488443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:46:47,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409554998] [2022-07-13 15:46:47,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:46:47,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:47,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:46:47,610 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:46:47,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 15:46:47,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 15:46:47,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:46:47,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 15:46:47,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:46:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 15:46:47,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:46:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 15:46:47,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409554998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:46:47,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:46:47,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 17 [2022-07-13 15:46:47,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620079294] [2022-07-13 15:46:47,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:46:47,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 15:46:47,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:46:47,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 15:46:47,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:46:47,768 INFO L87 Difference]: Start difference. First operand 184 states and 257 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:46:47,933 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2022-07-13 15:46:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 15:46:47,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-13 15:46:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:46:47,935 INFO L225 Difference]: With dead ends: 228 [2022-07-13 15:46:47,935 INFO L226 Difference]: Without dead ends: 224 [2022-07-13 15:46:47,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:46:47,936 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:46:47,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 158 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:46:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-07-13 15:46:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 215. [2022-07-13 15:46:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4158878504672898) internal successors, (303), 214 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 303 transitions. [2022-07-13 15:46:47,975 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 303 transitions. Word has length 25 [2022-07-13 15:46:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:46:47,976 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 303 transitions. [2022-07-13 15:46:47,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:46:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 303 transitions. [2022-07-13 15:46:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 15:46:47,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:46:47,977 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:46:47,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 15:46:48,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:48,187 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:46:48,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:46:48,188 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 10 times [2022-07-13 15:46:48,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:46:48,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155847340] [2022-07-13 15:46:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:46:48,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:46:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:46:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:46:48,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:46:48,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155847340] [2022-07-13 15:46:48,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155847340] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:46:48,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196582921] [2022-07-13 15:46:48,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:46:48,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:46:48,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:46:48,523 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:46:48,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 15:46:48,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:46:48,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:46:48,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-13 15:46:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:46:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:46:49,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:46:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:46:51,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196582921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:46:51,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:46:51,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 56 [2022-07-13 15:46:51,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58252524] [2022-07-13 15:46:51,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:46:51,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-13 15:46:51,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:46:51,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-13 15:46:51,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2897, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 15:46:51,249 INFO L87 Difference]: Start difference. First operand 215 states and 303 transitions. Second operand has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:47:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:47:03,209 INFO L93 Difference]: Finished difference Result 242 states and 335 transitions. [2022-07-13 15:47:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 15:47:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 15:47:03,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:47:03,211 INFO L225 Difference]: With dead ends: 242 [2022-07-13 15:47:03,211 INFO L226 Difference]: Without dead ends: 236 [2022-07-13 15:47:03,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=888, Invalid=6768, Unknown=0, NotChecked=0, Total=7656 [2022-07-13 15:47:03,214 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 181 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:47:03,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 286 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 15:47:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-13 15:47:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 225. [2022-07-13 15:47:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.3973214285714286) internal successors, (313), 224 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:47:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 313 transitions. [2022-07-13 15:47:03,258 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 313 transitions. Word has length 26 [2022-07-13 15:47:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:47:03,258 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 313 transitions. [2022-07-13 15:47:03,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:47:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 313 transitions. [2022-07-13 15:47:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 15:47:03,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:47:03,261 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:47:03,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 15:47:03,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-13 15:47:03,463 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:47:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:47:03,464 INFO L85 PathProgramCache]: Analyzing trace with hash -745924722, now seen corresponding path program 7 times [2022-07-13 15:47:03,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:47:03,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025762921] [2022-07-13 15:47:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:47:03,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:47:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:47:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 15:47:03,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:47:03,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025762921] [2022-07-13 15:47:03,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025762921] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:47:03,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81419428] [2022-07-13 15:47:03,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:47:03,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:47:03,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:47:03,612 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:47:03,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 15:47:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:47:03,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 15:47:03,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:47:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 15:47:03,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:47:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 15:47:04,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81419428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:47:04,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:47:04,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-07-13 15:47:04,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56079074] [2022-07-13 15:47:04,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:47:04,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 15:47:04,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:47:04,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 15:47:04,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-07-13 15:47:04,070 INFO L87 Difference]: Start difference. First operand 225 states and 313 transitions. Second operand has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:47:05,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:47:05,472 INFO L93 Difference]: Finished difference Result 420 states and 517 transitions. [2022-07-13 15:47:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-13 15:47:05,473 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 15:47:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:47:05,475 INFO L225 Difference]: With dead ends: 420 [2022-07-13 15:47:05,475 INFO L226 Difference]: Without dead ends: 394 [2022-07-13 15:47:05,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=719, Invalid=2821, Unknown=0, NotChecked=0, Total=3540 [2022-07-13 15:47:05,476 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 240 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:47:05,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 199 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:47:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-07-13 15:47:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 233. [2022-07-13 15:47:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.3922413793103448) internal successors, (323), 232 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:47:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 323 transitions. [2022-07-13 15:47:05,520 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 323 transitions. Word has length 26 [2022-07-13 15:47:05,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:47:05,521 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 323 transitions. [2022-07-13 15:47:05,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:47:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 323 transitions. [2022-07-13 15:47:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 15:47:05,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:47:05,522 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:47:05,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 15:47:05,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-13 15:47:05,732 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:47:05,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:47:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash -116525780, now seen corresponding path program 11 times [2022-07-13 15:47:05,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:47:05,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101739739] [2022-07-13 15:47:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:47:05,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:47:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:47:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:47:05,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:47:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101739739] [2022-07-13 15:47:05,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101739739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:47:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874465315] [2022-07-13 15:47:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:47:05,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:47:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:47:05,921 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:47:05,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 15:47:06,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-13 15:47:06,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:47:06,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 15:47:06,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:47:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:47:06,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:47:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:47:06,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874465315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:47:06,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:47:06,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-07-13 15:47:06,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300105886] [2022-07-13 15:47:06,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:47:06,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 15:47:06,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:47:06,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 15:47:06,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 15:47:06,651 INFO L87 Difference]: Start difference. First operand 233 states and 323 transitions. Second operand has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:47:28,812 WARN L233 SmtUtils]: Spent 5.00s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 15:47:43,883 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 15:47:53,945 WARN L233 SmtUtils]: Spent 7.73s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 15:49:32,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 15:49:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:49:33,925 INFO L93 Difference]: Finished difference Result 771 states and 1169 transitions. [2022-07-13 15:49:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-07-13 15:49:33,928 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 15:49:33,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:49:33,930 INFO L225 Difference]: With dead ends: 771 [2022-07-13 15:49:33,930 INFO L226 Difference]: Without dead ends: 735 [2022-07-13 15:49:33,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8175 ImplicationChecksByTransitivity, 141.7s TimeCoverageRelationStatistics Valid=5883, Invalid=15579, Unknown=0, NotChecked=0, Total=21462 [2022-07-13 15:49:33,936 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 956 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 1027 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-13 15:49:33,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 437 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 940 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-07-13 15:49:33,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-07-13 15:49:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 264. [2022-07-13 15:49:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.403041825095057) internal successors, (369), 263 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:34,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 369 transitions. [2022-07-13 15:49:34,005 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 369 transitions. Word has length 26 [2022-07-13 15:49:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:49:34,005 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 369 transitions. [2022-07-13 15:49:34,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 369 transitions. [2022-07-13 15:49:34,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 15:49:34,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:49:34,006 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:49:34,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-13 15:49:34,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 15:49:34,211 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:49:34,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:49:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1973427396, now seen corresponding path program 12 times [2022-07-13 15:49:34,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:49:34,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187035255] [2022-07-13 15:49:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:49:34,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:49:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:49:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-13 15:49:34,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:49:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187035255] [2022-07-13 15:49:34,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187035255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:49:34,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803218317] [2022-07-13 15:49:34,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:49:34,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:49:34,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:49:34,357 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:49:34,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 15:49:34,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 15:49:34,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:49:34,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 15:49:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:49:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-13 15:49:34,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:49:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 15:49:34,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803218317] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:49:34,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:49:34,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 25 [2022-07-13 15:49:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614878994] [2022-07-13 15:49:34,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:49:34,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 15:49:34,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:49:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 15:49:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-07-13 15:49:34,662 INFO L87 Difference]: Start difference. First operand 264 states and 369 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:49:35,707 INFO L93 Difference]: Finished difference Result 384 states and 491 transitions. [2022-07-13 15:49:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 15:49:35,708 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-13 15:49:35,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:49:35,709 INFO L225 Difference]: With dead ends: 384 [2022-07-13 15:49:35,709 INFO L226 Difference]: Without dead ends: 313 [2022-07-13 15:49:35,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2022-07-13 15:49:35,710 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:49:35,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 168 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:49:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-07-13 15:49:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 247. [2022-07-13 15:49:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.3739837398373984) internal successors, (338), 246 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 338 transitions. [2022-07-13 15:49:35,776 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 338 transitions. Word has length 28 [2022-07-13 15:49:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:49:35,776 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 338 transitions. [2022-07-13 15:49:35,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 338 transitions. [2022-07-13 15:49:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 15:49:35,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:49:35,777 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:49:35,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-13 15:49:35,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:49:35,978 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:49:35,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:49:35,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1548332572, now seen corresponding path program 8 times [2022-07-13 15:49:35,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:49:35,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155961756] [2022-07-13 15:49:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:49:35,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:49:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:49:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 15:49:36,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:49:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155961756] [2022-07-13 15:49:36,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155961756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:49:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721628632] [2022-07-13 15:49:36,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:49:36,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:49:36,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:49:36,162 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:49:36,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 15:49:36,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:49:36,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:49:36,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 15:49:36,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:49:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 15:49:36,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:49:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 15:49:36,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721628632] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:49:36,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:49:36,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2022-07-13 15:49:36,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938329609] [2022-07-13 15:49:36,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:49:36,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 15:49:36,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:49:36,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 15:49:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-07-13 15:49:36,369 INFO L87 Difference]: Start difference. First operand 247 states and 338 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:49:36,626 INFO L93 Difference]: Finished difference Result 302 states and 420 transitions. [2022-07-13 15:49:36,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 15:49:36,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-13 15:49:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:49:36,628 INFO L225 Difference]: With dead ends: 302 [2022-07-13 15:49:36,628 INFO L226 Difference]: Without dead ends: 298 [2022-07-13 15:49:36,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-07-13 15:49:36,629 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:49:36,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 205 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:49:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-13 15:49:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 281. [2022-07-13 15:49:36,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.3857142857142857) internal successors, (388), 280 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 388 transitions. [2022-07-13 15:49:36,692 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 388 transitions. Word has length 28 [2022-07-13 15:49:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:49:36,693 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 388 transitions. [2022-07-13 15:49:36,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 388 transitions. [2022-07-13 15:49:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 15:49:36,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:49:36,694 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:49:36,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-13 15:49:36,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-13 15:49:36,917 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:49:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:49:36,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1507034516, now seen corresponding path program 13 times [2022-07-13 15:49:36,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:49:36,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375923988] [2022-07-13 15:49:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:49:36,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:49:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:49:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:49:37,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:49:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375923988] [2022-07-13 15:49:37,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375923988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:49:37,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775098625] [2022-07-13 15:49:37,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:49:37,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:49:37,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:49:37,367 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:49:37,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-13 15:49:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:49:37,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-13 15:49:37,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:49:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:49:38,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:49:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:49:40,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775098625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:49:40,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:49:40,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 26] total 68 [2022-07-13 15:49:40,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461353176] [2022-07-13 15:49:40,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:49:40,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-13 15:49:40,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:49:40,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-13 15:49:40,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=4046, Unknown=0, NotChecked=0, Total=4556 [2022-07-13 15:49:40,196 INFO L87 Difference]: Start difference. First operand 281 states and 388 transitions. Second operand has 68 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 68 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:49:46,135 INFO L93 Difference]: Finished difference Result 314 states and 424 transitions. [2022-07-13 15:49:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 15:49:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 68 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-13 15:49:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:49:46,136 INFO L225 Difference]: With dead ends: 314 [2022-07-13 15:49:46,136 INFO L226 Difference]: Without dead ends: 288 [2022-07-13 15:49:46,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1259, Invalid=7483, Unknown=0, NotChecked=0, Total=8742 [2022-07-13 15:49:46,137 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 232 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:49:46,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 203 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 15:49:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-13 15:49:46,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 279. [2022-07-13 15:49:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.3884892086330936) internal successors, (386), 278 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 386 transitions. [2022-07-13 15:49:46,192 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 386 transitions. Word has length 30 [2022-07-13 15:49:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:49:46,192 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 386 transitions. [2022-07-13 15:49:46,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 68 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 386 transitions. [2022-07-13 15:49:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 15:49:46,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:49:46,193 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:49:46,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-13 15:49:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-13 15:49:46,394 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:49:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:49:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash -366435620, now seen corresponding path program 9 times [2022-07-13 15:49:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:49:46,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486771627] [2022-07-13 15:49:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:49:46,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:49:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:49:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 15:49:46,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:49:46,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486771627] [2022-07-13 15:49:46,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486771627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:49:46,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883330041] [2022-07-13 15:49:46,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:49:46,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:49:46,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:49:46,576 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:49:46,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-13 15:49:46,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 15:49:46,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:49:46,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 15:49:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:49:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 15:49:46,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:49:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 15:49:47,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883330041] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:49:47,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:49:47,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-13 15:49:47,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069978648] [2022-07-13 15:49:47,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:49:47,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-13 15:49:47,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:49:47,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-13 15:49:47,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 15:49:47,193 INFO L87 Difference]: Start difference. First operand 279 states and 386 transitions. Second operand has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:49:49,479 INFO L93 Difference]: Finished difference Result 494 states and 607 transitions. [2022-07-13 15:49:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-13 15:49:49,479 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-13 15:49:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:49:49,481 INFO L225 Difference]: With dead ends: 494 [2022-07-13 15:49:49,481 INFO L226 Difference]: Without dead ends: 469 [2022-07-13 15:49:49,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1064, Invalid=4192, Unknown=0, NotChecked=0, Total=5256 [2022-07-13 15:49:49,482 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 303 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 15:49:49,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 195 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 15:49:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-07-13 15:49:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 282. [2022-07-13 15:49:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.3807829181494662) internal successors, (388), 281 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 388 transitions. [2022-07-13 15:49:49,551 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 388 transitions. Word has length 30 [2022-07-13 15:49:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:49:49,551 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 388 transitions. [2022-07-13 15:49:49,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 388 transitions. [2022-07-13 15:49:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 15:49:49,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:49:49,552 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:49:49,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-13 15:49:49,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:49:49,757 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:49:49,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:49:49,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1001989604, now seen corresponding path program 14 times [2022-07-13 15:49:49,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:49:49,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316381865] [2022-07-13 15:49:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:49:49,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:49:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:49:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:49:49,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:49:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316381865] [2022-07-13 15:49:49,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316381865] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:49:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277334710] [2022-07-13 15:49:49,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:49:49,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:49:49,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:49:49,996 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:49:49,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-13 15:49:50,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:49:50,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:49:50,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 15:49:50,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:49:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:49:50,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:49:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:49:50,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277334710] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:49:50,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:49:50,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2022-07-13 15:49:50,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83431747] [2022-07-13 15:49:50,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:49:50,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 15:49:50,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:49:50,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 15:49:50,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1170, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 15:49:50,526 INFO L87 Difference]: Start difference. First operand 282 states and 388 transitions. Second operand has 39 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:50:06,297 WARN L233 SmtUtils]: Spent 7.16s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)