./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label35.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/eca-rers2012/Problem03_label35.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 7d54fa4bc915c3e337e3a3fd5a20fd6a2b066ccd7f01acca135e0e9b0e83a6b2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:26:17,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:26:17,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:26:17,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:26:17,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:26:17,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:26:17,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:26:17,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:26:17,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:26:17,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:26:17,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:26:17,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:26:17,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:26:17,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:26:18,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:26:18,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:26:18,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:26:18,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:26:18,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:26:18,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:26:18,016 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:26:18,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:26:18,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:26:18,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:26:18,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:26:18,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:26:18,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:26:18,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:26:18,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:26:18,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:26:18,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:26:18,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:26:18,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:26:18,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:26:18,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:26:18,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:26:18,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:26:18,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:26:18,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:26:18,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:26:18,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:26:18,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:26:18,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:26:18,069 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:26:18,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:26:18,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:26:18,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:26:18,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:26:18,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:26:18,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:26:18,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:26:18,071 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:26:18,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:26:18,072 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:26:18,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:26:18,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:26:18,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:26:18,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:26:18,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:26:18,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:26:18,073 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:26:18,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:26:18,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:26:18,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:26:18,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:26:18,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:26:18,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:26:18,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:26:18,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:26:18,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:26:18,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:26:18,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:26:18,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:26:18,075 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:26:18,075 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:26:18,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:26:18,076 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d54fa4bc915c3e337e3a3fd5a20fd6a2b066ccd7f01acca135e0e9b0e83a6b2 [2022-07-22 11:26:18,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:26:18,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:26:18,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:26:18,311 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:26:18,311 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:26:18,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label35.c [2022-07-22 11:26:18,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee76412bf/ade599163f2e4736b6ea643270dbc008/FLAGb8a2816df [2022-07-22 11:26:18,852 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:26:18,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label35.c [2022-07-22 11:26:18,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee76412bf/ade599163f2e4736b6ea643270dbc008/FLAGb8a2816df [2022-07-22 11:26:18,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee76412bf/ade599163f2e4736b6ea643270dbc008 [2022-07-22 11:26:18,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:26:18,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:26:18,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:26:18,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:26:18,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:26:18,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:26:18" (1/1) ... [2022-07-22 11:26:18,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1757d74f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:18, skipping insertion in model container [2022-07-22 11:26:18,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:26:18" (1/1) ... [2022-07-22 11:26:18,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:26:18,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:26:19,308 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/eca-rers2012/Problem03_label35.c[53787,53800] [2022-07-22 11:26:19,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:26:19,346 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:26:19,540 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/eca-rers2012/Problem03_label35.c[53787,53800] [2022-07-22 11:26:19,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:26:19,578 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:26:19,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19 WrapperNode [2022-07-22 11:26:19,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:26:19,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:26:19,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:26:19,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:26:19,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19" (1/1) ... [2022-07-22 11:26:19,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19" (1/1) ... [2022-07-22 11:26:19,725 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-22 11:26:19,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:26:19,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:26:19,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:26:19,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:26:19,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19" (1/1) ... [2022-07-22 11:26:19,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19" (1/1) ... [2022-07-22 11:26:19,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19" (1/1) ... [2022-07-22 11:26:19,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19" (1/1) ... [2022-07-22 11:26:19,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19" (1/1) ... [2022-07-22 11:26:19,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19" (1/1) ... [2022-07-22 11:26:19,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19" (1/1) ... [2022-07-22 11:26:19,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:26:19,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:26:19,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:26:19,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:26:19,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19" (1/1) ... [2022-07-22 11:26:19,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:26:19,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:19,913 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) [2022-07-22 11:26:19,979 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 [2022-07-22 11:26:20,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:26:20,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:26:20,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:26:20,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:26:20,099 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:26:20,103 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:26:21,087 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:26:21,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:26:21,093 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 11:26:21,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:26:21 BoogieIcfgContainer [2022-07-22 11:26:21,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:26:21,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:26:21,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:26:21,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:26:21,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:26:18" (1/3) ... [2022-07-22 11:26:21,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e55fcce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:26:21, skipping insertion in model container [2022-07-22 11:26:21,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:26:19" (2/3) ... [2022-07-22 11:26:21,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e55fcce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:26:21, skipping insertion in model container [2022-07-22 11:26:21,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:26:21" (3/3) ... [2022-07-22 11:26:21,100 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label35.c [2022-07-22 11:26:21,108 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:26:21,109 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:26:21,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:26:21,143 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@4c98f307, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4d885bc2 [2022-07-22 11:26:21,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:26:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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) [2022-07-22 11:26:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-22 11:26:21,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:21,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:21,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:21,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:21,159 INFO L85 PathProgramCache]: Analyzing trace with hash 21210939, now seen corresponding path program 1 times [2022-07-22 11:26:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:21,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095447222] [2022-07-22 11:26:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:21,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:26:21,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:21,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095447222] [2022-07-22 11:26:21,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095447222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:21,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:21,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:26:21,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213740284] [2022-07-22 11:26:21,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:21,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:21,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:21,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:21,643 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2022-07-22 11:26:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:22,380 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2022-07-22 11:26:22,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:22,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 145 [2022-07-22 11:26:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:22,391 INFO L225 Difference]: With dead ends: 857 [2022-07-22 11:26:22,391 INFO L226 Difference]: Without dead ends: 462 [2022-07-22 11:26:22,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:22,396 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 143 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:22,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:26:22,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-07-22 11:26:22,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2022-07-22 11:26:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 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) [2022-07-22 11:26:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2022-07-22 11:26:22,434 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 145 [2022-07-22 11:26:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:22,434 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2022-07-22 11:26:22,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2022-07-22 11:26:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2022-07-22 11:26:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-22 11:26:22,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:22,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:22,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:26:22,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:22,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2113463164, now seen corresponding path program 1 times [2022-07-22 11:26:22,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:22,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272863949] [2022-07-22 11:26:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:26:22,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:22,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272863949] [2022-07-22 11:26:22,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272863949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:22,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:22,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:26:22,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065890313] [2022-07-22 11:26:22,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:22,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:22,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:22,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:22,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:22,505 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-07-22 11:26:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:23,120 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2022-07-22 11:26:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:23,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 153 [2022-07-22 11:26:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:23,123 INFO L225 Difference]: With dead ends: 1344 [2022-07-22 11:26:23,124 INFO L226 Difference]: Without dead ends: 886 [2022-07-22 11:26:23,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:23,125 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:23,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:26:23,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-07-22 11:26:23,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2022-07-22 11:26:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5132336018411967) internal successors, (1315), 869 states have internal predecessors, (1315), 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) [2022-07-22 11:26:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1315 transitions. [2022-07-22 11:26:23,159 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1315 transitions. Word has length 153 [2022-07-22 11:26:23,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:23,159 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1315 transitions. [2022-07-22 11:26:23,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-07-22 11:26:23,160 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1315 transitions. [2022-07-22 11:26:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-22 11:26:23,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:23,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:23,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:26:23,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:23,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:23,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1484336335, now seen corresponding path program 1 times [2022-07-22 11:26:23,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:23,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557671426] [2022-07-22 11:26:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:23,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:26:23,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:23,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557671426] [2022-07-22 11:26:23,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557671426] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:23,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089637844] [2022-07-22 11:26:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:23,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:23,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:23,398 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) [2022-07-22 11:26:23,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:26:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:23,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:26:23,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:23,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089637844] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:23,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:23,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 11:26:23,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448650443] [2022-07-22 11:26:23,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:23,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:23,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:23,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:23,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:23,771 INFO L87 Difference]: Start difference. First operand 870 states and 1315 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2022-07-22 11:26:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:24,386 INFO L93 Difference]: Finished difference Result 2554 states and 3872 transitions. [2022-07-22 11:26:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:24,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 160 [2022-07-22 11:26:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:24,392 INFO L225 Difference]: With dead ends: 2554 [2022-07-22 11:26:24,392 INFO L226 Difference]: Without dead ends: 1686 [2022-07-22 11:26:24,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:24,394 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 94 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:24,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 417 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:26:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-07-22 11:26:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1684. [2022-07-22 11:26:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.3368983957219251) internal successors, (2250), 1683 states have internal predecessors, (2250), 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) [2022-07-22 11:26:24,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2250 transitions. [2022-07-22 11:26:24,433 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2250 transitions. Word has length 160 [2022-07-22 11:26:24,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:24,434 INFO L495 AbstractCegarLoop]: Abstraction has 1684 states and 2250 transitions. [2022-07-22 11:26:24,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2022-07-22 11:26:24,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2250 transitions. [2022-07-22 11:26:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 11:26:24,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:24,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:24,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 11:26:24,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:24,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:24,666 INFO L85 PathProgramCache]: Analyzing trace with hash -127458632, now seen corresponding path program 1 times [2022-07-22 11:26:24,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:24,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070082873] [2022-07-22 11:26:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:24,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:26:24,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:24,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070082873] [2022-07-22 11:26:24,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070082873] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:24,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:24,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:26:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489329800] [2022-07-22 11:26:24,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:24,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:24,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:24,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:24,738 INFO L87 Difference]: Start difference. First operand 1684 states and 2250 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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) [2022-07-22 11:26:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:25,294 INFO L93 Difference]: Finished difference Result 5017 states and 6710 transitions. [2022-07-22 11:26:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:25,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 168 [2022-07-22 11:26:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:25,304 INFO L225 Difference]: With dead ends: 5017 [2022-07-22 11:26:25,304 INFO L226 Difference]: Without dead ends: 3335 [2022-07-22 11:26:25,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:25,313 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:25,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 123 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:25,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2022-07-22 11:26:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3326. [2022-07-22 11:26:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.323609022556391) internal successors, (4401), 3325 states have internal predecessors, (4401), 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) [2022-07-22 11:26:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4401 transitions. [2022-07-22 11:26:25,361 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4401 transitions. Word has length 168 [2022-07-22 11:26:25,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:25,361 INFO L495 AbstractCegarLoop]: Abstraction has 3326 states and 4401 transitions. [2022-07-22 11:26:25,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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) [2022-07-22 11:26:25,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4401 transitions. [2022-07-22 11:26:25,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-22 11:26:25,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:25,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:25,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:26:25,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:25,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1063051184, now seen corresponding path program 1 times [2022-07-22 11:26:25,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:25,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929446171] [2022-07-22 11:26:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:25,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:26:25,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:25,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929446171] [2022-07-22 11:26:25,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929446171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:25,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:25,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:26:25,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568271754] [2022-07-22 11:26:25,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:25,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:25,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:25,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:25,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:25,444 INFO L87 Difference]: Start difference. First operand 3326 states and 4401 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2022-07-22 11:26:25,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:25,993 INFO L93 Difference]: Finished difference Result 9926 states and 13150 transitions. [2022-07-22 11:26:25,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:25,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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 171 [2022-07-22 11:26:25,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:26,012 INFO L225 Difference]: With dead ends: 9926 [2022-07-22 11:26:26,013 INFO L226 Difference]: Without dead ends: 6602 [2022-07-22 11:26:26,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:26,019 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 217 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:26,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 168 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:26,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6602 states. [2022-07-22 11:26:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6602 to 5768. [2022-07-22 11:26:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5768 states, 5767 states have (on average 1.3370903415987516) internal successors, (7711), 5767 states have internal predecessors, (7711), 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) [2022-07-22 11:26:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5768 states to 5768 states and 7711 transitions. [2022-07-22 11:26:26,133 INFO L78 Accepts]: Start accepts. Automaton has 5768 states and 7711 transitions. Word has length 171 [2022-07-22 11:26:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:26,134 INFO L495 AbstractCegarLoop]: Abstraction has 5768 states and 7711 transitions. [2022-07-22 11:26:26,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2022-07-22 11:26:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 5768 states and 7711 transitions. [2022-07-22 11:26:26,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-22 11:26:26,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:26,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:26,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:26:26,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:26,141 INFO L85 PathProgramCache]: Analyzing trace with hash 579221902, now seen corresponding path program 1 times [2022-07-22 11:26:26,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:26,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452521143] [2022-07-22 11:26:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:26,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 11:26:26,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:26,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452521143] [2022-07-22 11:26:26,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452521143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:26,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:26,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:26:26,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574274597] [2022-07-22 11:26:26,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:26,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:26,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:26,235 INFO L87 Difference]: Start difference. First operand 5768 states and 7711 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2022-07-22 11:26:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:26,838 INFO L93 Difference]: Finished difference Result 15634 states and 21107 transitions. [2022-07-22 11:26:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:26,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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 181 [2022-07-22 11:26:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:26,862 INFO L225 Difference]: With dead ends: 15634 [2022-07-22 11:26:26,862 INFO L226 Difference]: Without dead ends: 9868 [2022-07-22 11:26:26,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:26,868 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:26,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 188 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:26,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2022-07-22 11:26:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 9643. [2022-07-22 11:26:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9643 states, 9642 states have (on average 1.3568761667703797) internal successors, (13083), 9642 states have internal predecessors, (13083), 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) [2022-07-22 11:26:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9643 states to 9643 states and 13083 transitions. [2022-07-22 11:26:27,029 INFO L78 Accepts]: Start accepts. Automaton has 9643 states and 13083 transitions. Word has length 181 [2022-07-22 11:26:27,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:27,030 INFO L495 AbstractCegarLoop]: Abstraction has 9643 states and 13083 transitions. [2022-07-22 11:26:27,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2022-07-22 11:26:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 9643 states and 13083 transitions. [2022-07-22 11:26:27,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-22 11:26:27,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:27,037 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:27,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:26:27,037 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:27,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:27,038 INFO L85 PathProgramCache]: Analyzing trace with hash 892847105, now seen corresponding path program 1 times [2022-07-22 11:26:27,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:27,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88901875] [2022-07-22 11:26:27,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:27,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:26:27,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:27,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88901875] [2022-07-22 11:26:27,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88901875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:27,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:27,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:26:27,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917660692] [2022-07-22 11:26:27,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:27,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:27,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:27,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:27,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:27,097 INFO L87 Difference]: Start difference. First operand 9643 states and 13083 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2022-07-22 11:26:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:27,743 INFO L93 Difference]: Finished difference Result 22340 states and 30085 transitions. [2022-07-22 11:26:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:27,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 186 [2022-07-22 11:26:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:27,769 INFO L225 Difference]: With dead ends: 22340 [2022-07-22 11:26:27,769 INFO L226 Difference]: Without dead ends: 13106 [2022-07-22 11:26:27,776 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 [2022-07-22 11:26:27,776 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 202 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:27,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 420 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:26:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13106 states. [2022-07-22 11:26:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13106 to 13102. [2022-07-22 11:26:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13102 states, 13101 states have (on average 1.303640943439432) internal successors, (17079), 13101 states have internal predecessors, (17079), 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) [2022-07-22 11:26:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13102 states to 13102 states and 17079 transitions. [2022-07-22 11:26:27,910 INFO L78 Accepts]: Start accepts. Automaton has 13102 states and 17079 transitions. Word has length 186 [2022-07-22 11:26:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:27,910 INFO L495 AbstractCegarLoop]: Abstraction has 13102 states and 17079 transitions. [2022-07-22 11:26:27,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2022-07-22 11:26:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 13102 states and 17079 transitions. [2022-07-22 11:26:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-07-22 11:26:27,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:27,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:27,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 11:26:27,921 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash -278698685, now seen corresponding path program 1 times [2022-07-22 11:26:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:27,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278769453] [2022-07-22 11:26:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:27,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 11:26:28,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:28,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278769453] [2022-07-22 11:26:28,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278769453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:28,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:28,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:26:28,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662760562] [2022-07-22 11:26:28,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:28,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:28,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:28,010 INFO L87 Difference]: Start difference. First operand 13102 states and 17079 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2022-07-22 11:26:28,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:28,745 INFO L93 Difference]: Finished difference Result 30072 states and 39312 transitions. [2022-07-22 11:26:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:28,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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 190 [2022-07-22 11:26:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:28,779 INFO L225 Difference]: With dead ends: 30072 [2022-07-22 11:26:28,779 INFO L226 Difference]: Without dead ends: 16972 [2022-07-22 11:26:28,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:28,793 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 205 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:28,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 180 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:26:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16972 states. [2022-07-22 11:26:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16972 to 16959. [2022-07-22 11:26:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16959 states, 16958 states have (on average 1.2880646302630028) internal successors, (21843), 16958 states have internal predecessors, (21843), 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) [2022-07-22 11:26:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16959 states to 16959 states and 21843 transitions. [2022-07-22 11:26:29,048 INFO L78 Accepts]: Start accepts. Automaton has 16959 states and 21843 transitions. Word has length 190 [2022-07-22 11:26:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:29,049 INFO L495 AbstractCegarLoop]: Abstraction has 16959 states and 21843 transitions. [2022-07-22 11:26:29,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2022-07-22 11:26:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 16959 states and 21843 transitions. [2022-07-22 11:26:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-22 11:26:29,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:29,063 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:29,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 11:26:29,064 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:29,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash -93321792, now seen corresponding path program 1 times [2022-07-22 11:26:29,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:29,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282173536] [2022-07-22 11:26:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:29,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 11:26:29,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:29,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282173536] [2022-07-22 11:26:29,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282173536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:29,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:29,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:26:29,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049256116] [2022-07-22 11:26:29,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:29,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:29,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:29,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:29,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:29,130 INFO L87 Difference]: Start difference. First operand 16959 states and 21843 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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) [2022-07-22 11:26:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:29,915 INFO L93 Difference]: Finished difference Result 38823 states and 49780 transitions. [2022-07-22 11:26:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:29,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 192 [2022-07-22 11:26:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:29,946 INFO L225 Difference]: With dead ends: 38823 [2022-07-22 11:26:29,946 INFO L226 Difference]: Without dead ends: 22476 [2022-07-22 11:26:29,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:29,964 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 199 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:29,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 185 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:26:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22476 states. [2022-07-22 11:26:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22476 to 22457. [2022-07-22 11:26:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22457 states, 22456 states have (on average 1.2689704310651941) internal successors, (28496), 22456 states have internal predecessors, (28496), 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) [2022-07-22 11:26:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22457 states to 22457 states and 28496 transitions. [2022-07-22 11:26:30,282 INFO L78 Accepts]: Start accepts. Automaton has 22457 states and 28496 transitions. Word has length 192 [2022-07-22 11:26:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:30,282 INFO L495 AbstractCegarLoop]: Abstraction has 22457 states and 28496 transitions. [2022-07-22 11:26:30,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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) [2022-07-22 11:26:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 22457 states and 28496 transitions. [2022-07-22 11:26:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-22 11:26:30,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:30,298 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:30,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 11:26:30,299 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:30,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:30,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1718119762, now seen corresponding path program 1 times [2022-07-22 11:26:30,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:30,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351510518] [2022-07-22 11:26:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:30,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 11:26:30,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351510518] [2022-07-22 11:26:30,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351510518] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573521772] [2022-07-22 11:26:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:30,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:30,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:30,432 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) [2022-07-22 11:26:30,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:26:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:30,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 11:26:30,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:30,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573521772] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:30,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:30,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 11:26:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535139468] [2022-07-22 11:26:30,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:30,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:30,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:30,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:30,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:30,624 INFO L87 Difference]: Start difference. First operand 22457 states and 28496 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2022-07-22 11:26:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:31,410 INFO L93 Difference]: Finished difference Result 55906 states and 71092 transitions. [2022-07-22 11:26:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:31,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 197 [2022-07-22 11:26:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:31,464 INFO L225 Difference]: With dead ends: 55906 [2022-07-22 11:26:31,464 INFO L226 Difference]: Without dead ends: 34060 [2022-07-22 11:26:31,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:31,561 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 233 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:31,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 168 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:26:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34060 states. [2022-07-22 11:26:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34060 to 32838. [2022-07-22 11:26:31,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32838 states, 32837 states have (on average 1.2427140116332187) internal successors, (40807), 32837 states have internal predecessors, (40807), 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) [2022-07-22 11:26:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32838 states to 32838 states and 40807 transitions. [2022-07-22 11:26:32,040 INFO L78 Accepts]: Start accepts. Automaton has 32838 states and 40807 transitions. Word has length 197 [2022-07-22 11:26:32,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:32,040 INFO L495 AbstractCegarLoop]: Abstraction has 32838 states and 40807 transitions. [2022-07-22 11:26:32,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2022-07-22 11:26:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 32838 states and 40807 transitions. [2022-07-22 11:26:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-07-22 11:26:32,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:32,061 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:32,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:26:32,275 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,SelfDestructingSolverStorable9 [2022-07-22 11:26:32,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1145247182, now seen corresponding path program 1 times [2022-07-22 11:26:32,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:32,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832978032] [2022-07-22 11:26:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:32,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:26:32,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:32,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832978032] [2022-07-22 11:26:32,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832978032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:32,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433428172] [2022-07-22 11:26:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:32,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:32,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:32,365 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) [2022-07-22 11:26:32,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 11:26:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:32,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:32,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:26:32,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:32,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433428172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:32,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:32,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:26:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396318699] [2022-07-22 11:26:32,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:32,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:32,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:32,502 INFO L87 Difference]: Start difference. First operand 32838 states and 40807 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2022-07-22 11:26:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:33,422 INFO L93 Difference]: Finished difference Result 77450 states and 98256 transitions. [2022-07-22 11:26:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 212 [2022-07-22 11:26:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:33,479 INFO L225 Difference]: With dead ends: 77450 [2022-07-22 11:26:33,480 INFO L226 Difference]: Without dead ends: 45427 [2022-07-22 11:26:33,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:33,500 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 228 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:33,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 167 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:26:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45427 states. [2022-07-22 11:26:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45427 to 45424. [2022-07-22 11:26:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45424 states, 45423 states have (on average 1.2113026440349604) internal successors, (55021), 45423 states have internal predecessors, (55021), 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) [2022-07-22 11:26:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45424 states to 45424 states and 55021 transitions. [2022-07-22 11:26:34,060 INFO L78 Accepts]: Start accepts. Automaton has 45424 states and 55021 transitions. Word has length 212 [2022-07-22 11:26:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:34,061 INFO L495 AbstractCegarLoop]: Abstraction has 45424 states and 55021 transitions. [2022-07-22 11:26:34,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2022-07-22 11:26:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 45424 states and 55021 transitions. [2022-07-22 11:26:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-07-22 11:26:34,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:34,092 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:34,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:26:34,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:34,314 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:34,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:34,314 INFO L85 PathProgramCache]: Analyzing trace with hash -355502578, now seen corresponding path program 1 times [2022-07-22 11:26:34,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:34,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98650920] [2022-07-22 11:26:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:34,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-22 11:26:34,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:34,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98650920] [2022-07-22 11:26:34,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98650920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:34,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:34,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:26:34,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058133360] [2022-07-22 11:26:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:34,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:34,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:34,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:34,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:34,379 INFO L87 Difference]: Start difference. First operand 45424 states and 55021 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2022-07-22 11:26:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:35,277 INFO L93 Difference]: Finished difference Result 95132 states and 115261 transitions. [2022-07-22 11:26:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:35,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 216 [2022-07-22 11:26:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:35,340 INFO L225 Difference]: With dead ends: 95132 [2022-07-22 11:26:35,340 INFO L226 Difference]: Without dead ends: 50523 [2022-07-22 11:26:35,373 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 [2022-07-22 11:26:35,373 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 216 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:35,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 400 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:26:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50523 states. [2022-07-22 11:26:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50523 to 44000. [2022-07-22 11:26:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44000 states, 43999 states have (on average 1.2029818859519534) internal successors, (52930), 43999 states have internal predecessors, (52930), 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) [2022-07-22 11:26:35,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44000 states to 44000 states and 52930 transitions. [2022-07-22 11:26:35,921 INFO L78 Accepts]: Start accepts. Automaton has 44000 states and 52930 transitions. Word has length 216 [2022-07-22 11:26:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:35,921 INFO L495 AbstractCegarLoop]: Abstraction has 44000 states and 52930 transitions. [2022-07-22 11:26:35,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2022-07-22 11:26:35,921 INFO L276 IsEmpty]: Start isEmpty. Operand 44000 states and 52930 transitions. [2022-07-22 11:26:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-22 11:26:35,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:35,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:35,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 11:26:35,957 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:35,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1922201618, now seen corresponding path program 1 times [2022-07-22 11:26:35,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:35,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798419259] [2022-07-22 11:26:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:35,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:26:36,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:36,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798419259] [2022-07-22 11:26:36,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798419259] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:36,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963458681] [2022-07-22 11:26:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:36,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:36,161 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) [2022-07-22 11:26:36,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 11:26:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:36,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:36,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:26:36,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:36,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963458681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:36,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:36,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 11:26:36,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847114541] [2022-07-22 11:26:36,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:36,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:36,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:36,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:36,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:26:36,551 INFO L87 Difference]: Start difference. First operand 44000 states and 52930 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2022-07-22 11:26:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:37,184 INFO L93 Difference]: Finished difference Result 86985 states and 104731 transitions. [2022-07-22 11:26:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:37,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 225 [2022-07-22 11:26:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:37,230 INFO L225 Difference]: With dead ends: 86985 [2022-07-22 11:26:37,230 INFO L226 Difference]: Without dead ends: 43800 [2022-07-22 11:26:37,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:26:37,260 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 126 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:37,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 342 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:26:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43800 states. [2022-07-22 11:26:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43800 to 43594. [2022-07-22 11:26:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43594 states, 43593 states have (on average 1.1845250384236001) internal successors, (51637), 43593 states have internal predecessors, (51637), 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) [2022-07-22 11:26:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43594 states to 43594 states and 51637 transitions. [2022-07-22 11:26:37,838 INFO L78 Accepts]: Start accepts. Automaton has 43594 states and 51637 transitions. Word has length 225 [2022-07-22 11:26:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:37,838 INFO L495 AbstractCegarLoop]: Abstraction has 43594 states and 51637 transitions. [2022-07-22 11:26:37,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2022-07-22 11:26:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 43594 states and 51637 transitions. [2022-07-22 11:26:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-22 11:26:37,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:37,861 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:37,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:26:38,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:38,078 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1803571882, now seen corresponding path program 1 times [2022-07-22 11:26:38,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:38,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151484171] [2022-07-22 11:26:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:38,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 96 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-22 11:26:38,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:38,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151484171] [2022-07-22 11:26:38,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151484171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:38,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491439538] [2022-07-22 11:26:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:38,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:38,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:38,224 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) [2022-07-22 11:26:38,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 11:26:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:38,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:26:38,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:38,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491439538] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:38,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:38,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:26:38,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843087002] [2022-07-22 11:26:38,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:38,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:38,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:38,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:38,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:38,416 INFO L87 Difference]: Start difference. First operand 43594 states and 51637 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 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) [2022-07-22 11:26:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:39,281 INFO L93 Difference]: Finished difference Result 86171 states and 102135 transitions. [2022-07-22 11:26:39,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:39,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 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 232 [2022-07-22 11:26:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:39,328 INFO L225 Difference]: With dead ends: 86171 [2022-07-22 11:26:39,328 INFO L226 Difference]: Without dead ends: 43392 [2022-07-22 11:26:39,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:39,353 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 260 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:39,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 97 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:26:39,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43392 states. [2022-07-22 11:26:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43392 to 43389. [2022-07-22 11:26:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43389 states, 43388 states have (on average 1.17841338618973) internal successors, (51129), 43388 states have internal predecessors, (51129), 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) [2022-07-22 11:26:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43389 states to 43389 states and 51129 transitions. [2022-07-22 11:26:39,871 INFO L78 Accepts]: Start accepts. Automaton has 43389 states and 51129 transitions. Word has length 232 [2022-07-22 11:26:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:39,871 INFO L495 AbstractCegarLoop]: Abstraction has 43389 states and 51129 transitions. [2022-07-22 11:26:39,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 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) [2022-07-22 11:26:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 43389 states and 51129 transitions. [2022-07-22 11:26:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-22 11:26:39,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:39,888 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:39,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 11:26:40,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 11:26:40,106 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2098618921, now seen corresponding path program 1 times [2022-07-22 11:26:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:40,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513133721] [2022-07-22 11:26:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:40,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-22 11:26:40,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513133721] [2022-07-22 11:26:40,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513133721] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:40,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:40,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:26:40,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423203007] [2022-07-22 11:26:40,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:40,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:26:40,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:26:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:40,175 INFO L87 Difference]: Start difference. First operand 43389 states and 51129 transitions. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 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) [2022-07-22 11:26:41,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:41,293 INFO L93 Difference]: Finished difference Result 85997 states and 101418 transitions. [2022-07-22 11:26:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:26:41,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 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) Word has length 232 [2022-07-22 11:26:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:41,353 INFO L225 Difference]: With dead ends: 85997 [2022-07-22 11:26:41,353 INFO L226 Difference]: Without dead ends: 43423 [2022-07-22 11:26:41,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:41,369 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 443 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:41,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 157 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:26:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43423 states. [2022-07-22 11:26:41,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43423 to 41966. [2022-07-22 11:26:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41966 states, 41965 states have (on average 1.1804837364470393) internal successors, (49539), 41965 states have internal predecessors, (49539), 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) [2022-07-22 11:26:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41966 states to 41966 states and 49539 transitions. [2022-07-22 11:26:41,911 INFO L78 Accepts]: Start accepts. Automaton has 41966 states and 49539 transitions. Word has length 232 [2022-07-22 11:26:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:41,911 INFO L495 AbstractCegarLoop]: Abstraction has 41966 states and 49539 transitions. [2022-07-22 11:26:41,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 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) [2022-07-22 11:26:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 41966 states and 49539 transitions. [2022-07-22 11:26:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-22 11:26:41,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:41,931 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:41,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 11:26:41,932 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2031851988, now seen corresponding path program 1 times [2022-07-22 11:26:41,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:41,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35954257] [2022-07-22 11:26:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:41,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 109 proven. 6 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-22 11:26:42,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:42,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35954257] [2022-07-22 11:26:42,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35954257] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:42,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851359576] [2022-07-22 11:26:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:42,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:42,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:42,020 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) [2022-07-22 11:26:42,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 11:26:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:42,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:42,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-22 11:26:42,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:42,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851359576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:42,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:42,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:26:42,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710714669] [2022-07-22 11:26:42,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:42,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:42,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:42,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:42,202 INFO L87 Difference]: Start difference. First operand 41966 states and 49539 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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) [2022-07-22 11:26:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:42,974 INFO L93 Difference]: Finished difference Result 81725 states and 96331 transitions. [2022-07-22 11:26:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:42,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 239 [2022-07-22 11:26:42,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:43,024 INFO L225 Difference]: With dead ends: 81725 [2022-07-22 11:26:43,024 INFO L226 Difference]: Without dead ends: 40167 [2022-07-22 11:26:43,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:43,052 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 212 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:43,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 391 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40167 states. [2022-07-22 11:26:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40167 to 40139. [2022-07-22 11:26:43,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40139 states, 40138 states have (on average 1.166874283721162) internal successors, (46836), 40138 states have internal predecessors, (46836), 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) [2022-07-22 11:26:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40139 states to 40139 states and 46836 transitions. [2022-07-22 11:26:43,864 INFO L78 Accepts]: Start accepts. Automaton has 40139 states and 46836 transitions. Word has length 239 [2022-07-22 11:26:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:43,865 INFO L495 AbstractCegarLoop]: Abstraction has 40139 states and 46836 transitions. [2022-07-22 11:26:43,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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) [2022-07-22 11:26:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 40139 states and 46836 transitions. [2022-07-22 11:26:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-07-22 11:26:43,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:43,886 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:43,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 11:26:44,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 11:26:44,104 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1682959349, now seen corresponding path program 1 times [2022-07-22 11:26:44,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:44,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378101147] [2022-07-22 11:26:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:44,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 11:26:44,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:44,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378101147] [2022-07-22 11:26:44,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378101147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:44,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:44,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:26:44,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219333211] [2022-07-22 11:26:44,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:44,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:44,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:44,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:44,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:44,201 INFO L87 Difference]: Start difference. First operand 40139 states and 46836 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-07-22 11:26:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:44,875 INFO L93 Difference]: Finished difference Result 72330 states and 84375 transitions. [2022-07-22 11:26:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:44,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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 273 [2022-07-22 11:26:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:44,912 INFO L225 Difference]: With dead ends: 72330 [2022-07-22 11:26:44,913 INFO L226 Difference]: Without dead ends: 32803 [2022-07-22 11:26:44,935 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 [2022-07-22 11:26:44,935 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 279 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:44,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 369 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32803 states. [2022-07-22 11:26:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32803 to 32599. [2022-07-22 11:26:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32599 states, 32598 states have (on average 1.1405607705994232) internal successors, (37180), 32598 states have internal predecessors, (37180), 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) [2022-07-22 11:26:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32599 states to 32599 states and 37180 transitions. [2022-07-22 11:26:45,374 INFO L78 Accepts]: Start accepts. Automaton has 32599 states and 37180 transitions. Word has length 273 [2022-07-22 11:26:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:45,374 INFO L495 AbstractCegarLoop]: Abstraction has 32599 states and 37180 transitions. [2022-07-22 11:26:45,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-07-22 11:26:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 32599 states and 37180 transitions. [2022-07-22 11:26:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-07-22 11:26:45,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:45,402 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:45,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 11:26:45,402 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:45,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1937959493, now seen corresponding path program 1 times [2022-07-22 11:26:45,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:45,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104114183] [2022-07-22 11:26:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:45,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-22 11:26:45,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:45,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104114183] [2022-07-22 11:26:45,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104114183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:45,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887469662] [2022-07-22 11:26:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:45,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:45,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:45,496 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) [2022-07-22 11:26:45,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 11:26:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:45,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:26:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:26:45,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:45,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887469662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:45,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:45,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:26:45,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883655480] [2022-07-22 11:26:45,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:45,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:45,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:45,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:45,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:45,925 INFO L87 Difference]: Start difference. First operand 32599 states and 37180 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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) [2022-07-22 11:26:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:46,649 INFO L93 Difference]: Finished difference Result 63964 states and 72825 transitions. [2022-07-22 11:26:46,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:46,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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 323 [2022-07-22 11:26:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:46,688 INFO L225 Difference]: With dead ends: 63964 [2022-07-22 11:26:46,689 INFO L226 Difference]: Without dead ends: 31977 [2022-07-22 11:26:46,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:46,712 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 148 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:46,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 368 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:46,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31977 states. [2022-07-22 11:26:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31977 to 27711. [2022-07-22 11:26:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27711 states, 27710 states have (on average 1.1204619271021292) internal successors, (31048), 27710 states have internal predecessors, (31048), 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) [2022-07-22 11:26:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27711 states to 27711 states and 31048 transitions. [2022-07-22 11:26:47,152 INFO L78 Accepts]: Start accepts. Automaton has 27711 states and 31048 transitions. Word has length 323 [2022-07-22 11:26:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:47,152 INFO L495 AbstractCegarLoop]: Abstraction has 27711 states and 31048 transitions. [2022-07-22 11:26:47,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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) [2022-07-22 11:26:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 27711 states and 31048 transitions. [2022-07-22 11:26:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-07-22 11:26:47,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:47,173 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:47,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 11:26:47,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:47,393 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:47,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:47,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1052519441, now seen corresponding path program 1 times [2022-07-22 11:26:47,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:47,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707591774] [2022-07-22 11:26:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:47,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-07-22 11:26:47,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:47,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707591774] [2022-07-22 11:26:47,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707591774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:47,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411181213] [2022-07-22 11:26:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:47,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:47,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:47,484 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) [2022-07-22 11:26:47,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 11:26:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:26:47,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-22 11:26:47,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:47,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411181213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:47,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:47,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 11:26:47,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263889541] [2022-07-22 11:26:47,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:47,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:47,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:47,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:47,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:47,698 INFO L87 Difference]: Start difference. First operand 27711 states and 31048 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 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) [2022-07-22 11:26:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:48,091 INFO L93 Difference]: Finished difference Result 50090 states and 56025 transitions. [2022-07-22 11:26:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 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 326 [2022-07-22 11:26:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:48,111 INFO L225 Difference]: With dead ends: 50090 [2022-07-22 11:26:48,111 INFO L226 Difference]: Without dead ends: 23601 [2022-07-22 11:26:48,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:48,126 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:48,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:26:48,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23601 states. [2022-07-22 11:26:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23601 to 21977. [2022-07-22 11:26:48,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21977 states, 21976 states have (on average 1.1098016017473609) internal successors, (24389), 21976 states have internal predecessors, (24389), 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) [2022-07-22 11:26:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21977 states to 21977 states and 24389 transitions. [2022-07-22 11:26:48,496 INFO L78 Accepts]: Start accepts. Automaton has 21977 states and 24389 transitions. Word has length 326 [2022-07-22 11:26:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:48,496 INFO L495 AbstractCegarLoop]: Abstraction has 21977 states and 24389 transitions. [2022-07-22 11:26:48,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 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) [2022-07-22 11:26:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 21977 states and 24389 transitions. [2022-07-22 11:26:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-07-22 11:26:48,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:48,521 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:48,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 11:26:48,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:48,740 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash -350026832, now seen corresponding path program 1 times [2022-07-22 11:26:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:48,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145953040] [2022-07-22 11:26:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-22 11:26:48,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:48,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145953040] [2022-07-22 11:26:48,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145953040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:48,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:48,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:26:48,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554161125] [2022-07-22 11:26:48,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:48,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:48,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:48,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:48,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:48,821 INFO L87 Difference]: Start difference. First operand 21977 states and 24389 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2022-07-22 11:26:49,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:49,099 INFO L93 Difference]: Finished difference Result 57576 states and 64024 transitions. [2022-07-22 11:26:49,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:49,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 345 [2022-07-22 11:26:49,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:49,138 INFO L225 Difference]: With dead ends: 57576 [2022-07-22 11:26:49,138 INFO L226 Difference]: Without dead ends: 36618 [2022-07-22 11:26:49,158 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 [2022-07-22 11:26:49,158 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 298 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:49,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 863 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:26:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36618 states. [2022-07-22 11:26:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36618 to 36006. [2022-07-22 11:26:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36006 states, 36005 states have (on average 1.1023468962644076) internal successors, (39690), 36005 states have internal predecessors, (39690), 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) [2022-07-22 11:26:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36006 states to 36006 states and 39690 transitions. [2022-07-22 11:26:49,775 INFO L78 Accepts]: Start accepts. Automaton has 36006 states and 39690 transitions. Word has length 345 [2022-07-22 11:26:49,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:49,775 INFO L495 AbstractCegarLoop]: Abstraction has 36006 states and 39690 transitions. [2022-07-22 11:26:49,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2022-07-22 11:26:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 36006 states and 39690 transitions. [2022-07-22 11:26:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-07-22 11:26:49,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:49,808 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:49,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 11:26:49,809 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:49,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:49,809 INFO L85 PathProgramCache]: Analyzing trace with hash 109963054, now seen corresponding path program 1 times [2022-07-22 11:26:49,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:49,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810582127] [2022-07-22 11:26:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:49,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 134 proven. 6 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-22 11:26:49,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810582127] [2022-07-22 11:26:49,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810582127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:49,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092877726] [2022-07-22 11:26:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:49,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:49,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:49,990 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) [2022-07-22 11:26:50,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 11:26:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:26:50,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 11:26:50,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:50,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092877726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:50,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:50,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:26:50,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424166431] [2022-07-22 11:26:50,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:50,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:50,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:50,631 INFO L87 Difference]: Start difference. First operand 36006 states and 39690 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 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) [2022-07-22 11:26:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:51,360 INFO L93 Difference]: Finished difference Result 73439 states and 80999 transitions. [2022-07-22 11:26:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:51,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 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 357 [2022-07-22 11:26:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:51,408 INFO L225 Difference]: With dead ends: 73439 [2022-07-22 11:26:51,409 INFO L226 Difference]: Without dead ends: 38452 [2022-07-22 11:26:51,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:51,436 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 91 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:51,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 131 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38452 states. [2022-07-22 11:26:51,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38452 to 37634. [2022-07-22 11:26:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37634 states, 37633 states have (on average 1.0925517497940638) internal successors, (41116), 37633 states have internal predecessors, (41116), 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) [2022-07-22 11:26:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37634 states to 37634 states and 41116 transitions. [2022-07-22 11:26:52,002 INFO L78 Accepts]: Start accepts. Automaton has 37634 states and 41116 transitions. Word has length 357 [2022-07-22 11:26:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:52,002 INFO L495 AbstractCegarLoop]: Abstraction has 37634 states and 41116 transitions. [2022-07-22 11:26:52,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 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) [2022-07-22 11:26:52,003 INFO L276 IsEmpty]: Start isEmpty. Operand 37634 states and 41116 transitions. [2022-07-22 11:26:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-07-22 11:26:52,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:52,030 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:52,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 11:26:52,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:52,244 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:52,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1824925852, now seen corresponding path program 1 times [2022-07-22 11:26:52,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:52,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660020862] [2022-07-22 11:26:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:52,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-22 11:26:52,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:52,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660020862] [2022-07-22 11:26:52,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660020862] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:52,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:52,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:26:52,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002111187] [2022-07-22 11:26:52,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:52,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:26:52,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:26:52,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:52,355 INFO L87 Difference]: Start difference. First operand 37634 states and 41116 transitions. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 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) [2022-07-22 11:26:53,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:53,316 INFO L93 Difference]: Finished difference Result 78134 states and 85443 transitions. [2022-07-22 11:26:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:26:53,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 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 361 [2022-07-22 11:26:53,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:53,356 INFO L225 Difference]: With dead ends: 78134 [2022-07-22 11:26:53,356 INFO L226 Difference]: Without dead ends: 41517 [2022-07-22 11:26:53,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:53,379 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 357 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:53,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 109 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:26:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41517 states. [2022-07-22 11:26:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41517 to 38249. [2022-07-22 11:26:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38249 states, 38248 states have (on average 1.0934166492365613) internal successors, (41821), 38248 states have internal predecessors, (41821), 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) [2022-07-22 11:26:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38249 states to 38249 states and 41821 transitions. [2022-07-22 11:26:53,887 INFO L78 Accepts]: Start accepts. Automaton has 38249 states and 41821 transitions. Word has length 361 [2022-07-22 11:26:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:53,887 INFO L495 AbstractCegarLoop]: Abstraction has 38249 states and 41821 transitions. [2022-07-22 11:26:53,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 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) [2022-07-22 11:26:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 38249 states and 41821 transitions. [2022-07-22 11:26:53,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-07-22 11:26:53,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:53,910 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:53,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 11:26:53,911 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:53,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:53,911 INFO L85 PathProgramCache]: Analyzing trace with hash 860592001, now seen corresponding path program 1 times [2022-07-22 11:26:53,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:53,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553783107] [2022-07-22 11:26:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:53,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-22 11:26:53,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:53,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553783107] [2022-07-22 11:26:53,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553783107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:53,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:53,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:26:53,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485377464] [2022-07-22 11:26:53,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:53,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:26:53,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:53,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:26:53,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:53,997 INFO L87 Difference]: Start difference. First operand 38249 states and 41821 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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) [2022-07-22 11:26:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:54,833 INFO L93 Difference]: Finished difference Result 78328 states and 85667 transitions. [2022-07-22 11:26:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:26:54,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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 363 [2022-07-22 11:26:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:54,866 INFO L225 Difference]: With dead ends: 78328 [2022-07-22 11:26:54,866 INFO L226 Difference]: Without dead ends: 36833 [2022-07-22 11:26:54,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:54,884 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 495 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:54,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 62 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:26:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36833 states. [2022-07-22 11:26:55,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36833 to 34397. [2022-07-22 11:26:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34397 states, 34396 states have (on average 1.058233515525061) internal successors, (36399), 34396 states have internal predecessors, (36399), 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) [2022-07-22 11:26:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34397 states to 34397 states and 36399 transitions. [2022-07-22 11:26:55,212 INFO L78 Accepts]: Start accepts. Automaton has 34397 states and 36399 transitions. Word has length 363 [2022-07-22 11:26:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:55,212 INFO L495 AbstractCegarLoop]: Abstraction has 34397 states and 36399 transitions. [2022-07-22 11:26:55,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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) [2022-07-22 11:26:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 34397 states and 36399 transitions. [2022-07-22 11:26:55,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-07-22 11:26:55,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:55,231 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:55,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 11:26:55,231 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:55,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1769100235, now seen corresponding path program 1 times [2022-07-22 11:26:55,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:55,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940972822] [2022-07-22 11:26:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:55,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 247 proven. 6 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-07-22 11:26:55,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:55,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940972822] [2022-07-22 11:26:55,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940972822] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:55,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042773133] [2022-07-22 11:26:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:55,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:55,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:55,421 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) [2022-07-22 11:26:55,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 11:26:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:55,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:55,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-22 11:26:55,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:55,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042773133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:55,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:55,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:26:55,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347320331] [2022-07-22 11:26:55,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:55,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:55,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:55,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:55,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:55,705 INFO L87 Difference]: Start difference. First operand 34397 states and 36399 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 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) [2022-07-22 11:26:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:56,193 INFO L93 Difference]: Finished difference Result 65540 states and 69289 transitions. [2022-07-22 11:26:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:56,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 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 375 [2022-07-22 11:26:56,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:56,230 INFO L225 Difference]: With dead ends: 65540 [2022-07-22 11:26:56,230 INFO L226 Difference]: Without dead ends: 31957 [2022-07-22 11:26:56,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:56,254 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 168 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:56,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 75 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:26:56,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31957 states. [2022-07-22 11:26:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31957 to 27688. [2022-07-22 11:26:56,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27688 states, 27687 states have (on average 1.0462310831798316) internal successors, (28967), 27687 states have internal predecessors, (28967), 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) [2022-07-22 11:26:56,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27688 states to 27688 states and 28967 transitions. [2022-07-22 11:26:56,637 INFO L78 Accepts]: Start accepts. Automaton has 27688 states and 28967 transitions. Word has length 375 [2022-07-22 11:26:56,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:56,637 INFO L495 AbstractCegarLoop]: Abstraction has 27688 states and 28967 transitions. [2022-07-22 11:26:56,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 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) [2022-07-22 11:26:56,637 INFO L276 IsEmpty]: Start isEmpty. Operand 27688 states and 28967 transitions. [2022-07-22 11:26:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-07-22 11:26:56,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:56,656 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:56,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 11:26:56,871 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,SelfDestructingSolverStorable23 [2022-07-22 11:26:56,872 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:56,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:56,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1421326569, now seen corresponding path program 1 times [2022-07-22 11:26:56,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:56,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666501010] [2022-07-22 11:26:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:56,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 221 proven. 6 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-07-22 11:26:57,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:57,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666501010] [2022-07-22 11:26:57,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666501010] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:57,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584558125] [2022-07-22 11:26:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:57,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:57,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:57,060 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) [2022-07-22 11:26:57,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 11:26:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:57,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:26:57,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-07-22 11:26:57,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:57,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584558125] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:57,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:57,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:26:57,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292005033] [2022-07-22 11:26:57,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:57,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:26:57,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:57,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:26:57,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:26:57,408 INFO L87 Difference]: Start difference. First operand 27688 states and 28967 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 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) [2022-07-22 11:26:58,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:58,111 INFO L93 Difference]: Finished difference Result 54972 states and 57499 transitions. [2022-07-22 11:26:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:26:58,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 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 391 [2022-07-22 11:26:58,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:58,149 INFO L225 Difference]: With dead ends: 54972 [2022-07-22 11:26:58,149 INFO L226 Difference]: Without dead ends: 28098 [2022-07-22 11:26:58,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:26:58,171 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 527 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:58,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 115 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:58,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28098 states. [2022-07-22 11:26:58,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28098 to 27688. [2022-07-22 11:26:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27688 states, 27687 states have (on average 1.043305522447358) internal successors, (28886), 27687 states have internal predecessors, (28886), 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) [2022-07-22 11:26:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27688 states to 27688 states and 28886 transitions. [2022-07-22 11:26:58,529 INFO L78 Accepts]: Start accepts. Automaton has 27688 states and 28886 transitions. Word has length 391 [2022-07-22 11:26:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:58,529 INFO L495 AbstractCegarLoop]: Abstraction has 27688 states and 28886 transitions. [2022-07-22 11:26:58,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 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) [2022-07-22 11:26:58,530 INFO L276 IsEmpty]: Start isEmpty. Operand 27688 states and 28886 transitions. [2022-07-22 11:26:58,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-07-22 11:26:58,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:58,552 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:58,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 11:26:58,766 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,SelfDestructingSolverStorable24 [2022-07-22 11:26:58,767 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:58,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1770963971, now seen corresponding path program 1 times [2022-07-22 11:26:58,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:58,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397109275] [2022-07-22 11:26:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:58,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 123 proven. 6 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-22 11:26:58,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:58,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397109275] [2022-07-22 11:26:58,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397109275] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:58,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365432337] [2022-07-22 11:26:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:58,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:58,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:58,915 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) [2022-07-22 11:26:58,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 11:26:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:59,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 11:26:59,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-22 11:26:59,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:59,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365432337] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:59,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:59,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:26:59,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837043799] [2022-07-22 11:26:59,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:59,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:26:59,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:59,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:26:59,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:26:59,202 INFO L87 Difference]: Start difference. First operand 27688 states and 28886 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:27:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:27:00,021 INFO L93 Difference]: Finished difference Result 77747 states and 81181 transitions. [2022-07-22 11:27:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:27:00,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2022-07-22 11:27:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:27:00,096 INFO L225 Difference]: With dead ends: 77747 [2022-07-22 11:27:00,097 INFO L226 Difference]: Without dead ends: 50873 [2022-07-22 11:27:00,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:27:00,127 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 478 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:27:00,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 279 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:27:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50873 states. [2022-07-22 11:27:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50873 to 49651. [2022-07-22 11:27:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49651 states, 49650 states have (on average 1.0440886203423967) internal successors, (51839), 49650 states have internal predecessors, (51839), 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) [2022-07-22 11:27:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49651 states to 49651 states and 51839 transitions. [2022-07-22 11:27:00,864 INFO L78 Accepts]: Start accepts. Automaton has 49651 states and 51839 transitions. Word has length 419 [2022-07-22 11:27:00,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:27:00,864 INFO L495 AbstractCegarLoop]: Abstraction has 49651 states and 51839 transitions. [2022-07-22 11:27:00,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:27:00,865 INFO L276 IsEmpty]: Start isEmpty. Operand 49651 states and 51839 transitions. [2022-07-22 11:27:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2022-07-22 11:27:00,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:27:00,891 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:27:00,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 11:27:01,105 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,SelfDestructingSolverStorable25 [2022-07-22 11:27:01,106 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:27:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:27:01,107 INFO L85 PathProgramCache]: Analyzing trace with hash 57324800, now seen corresponding path program 1 times [2022-07-22 11:27:01,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:27:01,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310533307] [2022-07-22 11:27:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:27:01,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:27:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:27:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 275 proven. 6 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-07-22 11:27:01,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:27:01,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310533307] [2022-07-22 11:27:01,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310533307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:27:01,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194980489] [2022-07-22 11:27:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:27:01,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:27:01,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:27:01,272 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) [2022-07-22 11:27:01,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 11:27:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:27:01,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:27:01,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:27:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 11:27:01,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:27:01,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194980489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:27:01,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:27:01,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 11:27:01,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719074483] [2022-07-22 11:27:01,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:27:01,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:27:01,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:27:01,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:27:01,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:27:01,636 INFO L87 Difference]: Start difference. First operand 49651 states and 51839 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 2 states have internal predecessors, (272), 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) [2022-07-22 11:27:02,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:27:02,236 INFO L93 Difference]: Finished difference Result 145289 states and 151753 transitions. [2022-07-22 11:27:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:27:02,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 2 states have internal predecessors, (272), 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 420 [2022-07-22 11:27:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:27:02,369 INFO L225 Difference]: With dead ends: 145289 [2022-07-22 11:27:02,370 INFO L226 Difference]: Without dead ends: 96452 [2022-07-22 11:27:02,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:27:02,420 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 175 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:27:02,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 470 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:27:02,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96452 states. [2022-07-22 11:27:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96452 to 96448. [2022-07-22 11:27:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96448 states, 96447 states have (on average 1.0443767043039183) internal successors, (100727), 96447 states have internal predecessors, (100727), 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) [2022-07-22 11:27:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96448 states to 96448 states and 100727 transitions. [2022-07-22 11:27:03,941 INFO L78 Accepts]: Start accepts. Automaton has 96448 states and 100727 transitions. Word has length 420 [2022-07-22 11:27:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:27:03,941 INFO L495 AbstractCegarLoop]: Abstraction has 96448 states and 100727 transitions. [2022-07-22 11:27:03,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 2 states have internal predecessors, (272), 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) [2022-07-22 11:27:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 96448 states and 100727 transitions. [2022-07-22 11:27:03,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-07-22 11:27:03,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:27:03,965 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:27:04,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 11:27:04,188 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,SelfDestructingSolverStorable26 [2022-07-22 11:27:04,189 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:27:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:27:04,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1798712178, now seen corresponding path program 1 times [2022-07-22 11:27:04,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:27:04,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130043796] [2022-07-22 11:27:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:27:04,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:27:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:27:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-07-22 11:27:04,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:27:04,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130043796] [2022-07-22 11:27:04,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130043796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:27:04,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683429480] [2022-07-22 11:27:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:27:04,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:27:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:27:04,311 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) [2022-07-22 11:27:04,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 11:27:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:27:04,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 11:27:04,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:27:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 290 proven. 37 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-22 11:27:04,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:27:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 290 proven. 37 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-22 11:27:04,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683429480] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:27:04,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:27:04,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-07-22 11:27:04,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681636929] [2022-07-22 11:27:04,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:27:04,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:27:04,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:27:04,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:27:04,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:27:04,839 INFO L87 Difference]: Start difference. First operand 96448 states and 100727 transitions. Second operand has 6 states, 6 states have (on average 54.5) internal successors, (327), 5 states have internal predecessors, (327), 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) [2022-07-22 11:27:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:27:07,122 INFO L93 Difference]: Finished difference Result 301669 states and 315858 transitions. [2022-07-22 11:27:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:27:07,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 54.5) internal successors, (327), 5 states have internal predecessors, (327), 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 421 [2022-07-22 11:27:07,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:27:07,469 INFO L225 Difference]: With dead ends: 301669 [2022-07-22 11:27:07,469 INFO L226 Difference]: Without dead ends: 204204 [2022-07-22 11:27:07,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:27:07,577 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2302 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:27:07,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2302 Valid, 135 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 11:27:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204204 states. [2022-07-22 11:27:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204204 to 180125. [2022-07-22 11:27:10,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180125 states, 180124 states have (on average 1.046601230263596) internal successors, (188518), 180124 states have internal predecessors, (188518), 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) [2022-07-22 11:27:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180125 states to 180125 states and 188518 transitions. [2022-07-22 11:27:10,438 INFO L78 Accepts]: Start accepts. Automaton has 180125 states and 188518 transitions. Word has length 421 [2022-07-22 11:27:10,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:27:10,438 INFO L495 AbstractCegarLoop]: Abstraction has 180125 states and 188518 transitions. [2022-07-22 11:27:10,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.5) internal successors, (327), 5 states have internal predecessors, (327), 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) [2022-07-22 11:27:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 180125 states and 188518 transitions. [2022-07-22 11:27:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-07-22 11:27:10,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:27:10,462 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:27:10,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 11:27:10,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:27:10,676 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:27:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:27:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1783273285, now seen corresponding path program 1 times [2022-07-22 11:27:10,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:27:10,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729952698] [2022-07-22 11:27:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:27:10,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:27:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:27:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 294 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-22 11:27:10,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:27:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729952698] [2022-07-22 11:27:10,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729952698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:27:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919031638] [2022-07-22 11:27:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:27:10,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:27:10,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:27:10,825 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) [2022-07-22 11:27:10,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 11:27:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:27:10,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:27:10,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:27:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-22 11:27:11,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:27:11,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919031638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:27:11,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:27:11,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 11:27:11,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192939404] [2022-07-22 11:27:11,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:27:11,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:27:11,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:27:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:27:11,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:27:11,032 INFO L87 Difference]: Start difference. First operand 180125 states and 188518 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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)