./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de62.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de62.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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 00:36:53,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 00:36:53,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 00:36:53,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 00:36:53,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 00:36:53,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 00:36:54,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 00:36:54,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 00:36:54,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 00:36:54,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 00:36:54,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 00:36:54,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 00:36:54,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 00:36:54,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 00:36:54,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 00:36:54,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 00:36:54,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 00:36:54,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 00:36:54,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 00:36:54,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 00:36:54,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 00:36:54,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 00:36:54,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 00:36:54,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 00:36:54,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 00:36:54,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 00:36:54,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 00:36:54,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 00:36:54,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 00:36:54,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 00:36:54,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 00:36:54,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 00:36:54,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 00:36:54,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 00:36:54,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 00:36:54,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 00:36:54,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 00:36:54,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 00:36:54,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 00:36:54,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 00:36:54,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 00:36:54,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 00:36:54,059 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 00:36:54,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 00:36:54,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 00:36:54,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 00:36:54,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 00:36:54,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 00:36:54,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 00:36:54,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 00:36:54,066 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 00:36:54,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 00:36:54,067 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 00:36:54,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 00:36:54,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 00:36:54,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 00:36:54,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 00:36:54,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 00:36:54,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 00:36:54,068 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 00:36:54,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 00:36:54,068 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 00:36:54,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 00:36:54,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 00:36:54,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 00:36:54,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 00:36:54,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:36:54,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 00:36:54,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 00:36:54,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 00:36:54,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 00:36:54,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 00:36:54,070 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 00:36:54,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 00:36:54,070 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 00:36:54,071 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 00:36:54,071 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 00:36:54,071 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2023-02-18 00:36:54,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 00:36:54,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 00:36:54,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 00:36:54,303 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 00:36:54,303 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 00:36:54,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de62.c [2023-02-18 00:36:55,318 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 00:36:55,458 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 00:36:55,458 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c [2023-02-18 00:36:55,462 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b30455879/ce1dd834dcb34e5486fc67565647ee4c/FLAG62e159592 [2023-02-18 00:36:55,905 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b30455879/ce1dd834dcb34e5486fc67565647ee4c [2023-02-18 00:36:55,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 00:36:55,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 00:36:55,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 00:36:55,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 00:36:55,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 00:36:55,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:36:55" (1/1) ... [2023-02-18 00:36:55,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@397969fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:55, skipping insertion in model container [2023-02-18 00:36:55,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:36:55" (1/1) ... [2023-02-18 00:36:55,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 00:36:55,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 00:36:56,119 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2023-02-18 00:36:56,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:36:56,137 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 00:36:56,144 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2023-02-18 00:36:56,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:36:56,164 INFO L208 MainTranslator]: Completed translation [2023-02-18 00:36:56,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56 WrapperNode [2023-02-18 00:36:56,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 00:36:56,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 00:36:56,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 00:36:56,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 00:36:56,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (1/1) ... [2023-02-18 00:36:56,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (1/1) ... [2023-02-18 00:36:56,194 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-02-18 00:36:56,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 00:36:56,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 00:36:56,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 00:36:56,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 00:36:56,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (1/1) ... [2023-02-18 00:36:56,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (1/1) ... [2023-02-18 00:36:56,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (1/1) ... [2023-02-18 00:36:56,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (1/1) ... [2023-02-18 00:36:56,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (1/1) ... [2023-02-18 00:36:56,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (1/1) ... [2023-02-18 00:36:56,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (1/1) ... [2023-02-18 00:36:56,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (1/1) ... [2023-02-18 00:36:56,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 00:36:56,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 00:36:56,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 00:36:56,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 00:36:56,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (1/1) ... [2023-02-18 00:36:56,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:36:56,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:56,236 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) [2023-02-18 00:36:56,237 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 [2023-02-18 00:36:56,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 00:36:56,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 00:36:56,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 00:36:56,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 00:36:56,307 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 00:36:56,312 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 00:36:56,459 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 00:36:56,463 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 00:36:56,463 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-18 00:36:56,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:36:56 BoogieIcfgContainer [2023-02-18 00:36:56,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 00:36:56,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 00:36:56,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 00:36:56,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 00:36:56,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:36:55" (1/3) ... [2023-02-18 00:36:56,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139396fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:36:56, skipping insertion in model container [2023-02-18 00:36:56,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:56" (2/3) ... [2023-02-18 00:36:56,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139396fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:36:56, skipping insertion in model container [2023-02-18 00:36:56,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:36:56" (3/3) ... [2023-02-18 00:36:56,470 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2023-02-18 00:36:56,481 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 00:36:56,481 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 00:36:56,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 00:36:56,578 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4644d8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 00:36:56,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 00:36:56,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:56,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 00:36:56,586 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:56,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:56,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:56,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2023-02-18 00:36:56,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:56,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289562827] [2023-02-18 00:36:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:56,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:56,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289562827] [2023-02-18 00:36:56,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289562827] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:36:56,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:36:56,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 00:36:56,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455502079] [2023-02-18 00:36:56,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:36:56,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 00:36:56,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:56,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 00:36:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 00:36:56,774 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:56,788 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2023-02-18 00:36:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 00:36:56,790 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2023-02-18 00:36:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:56,796 INFO L225 Difference]: With dead ends: 31 [2023-02-18 00:36:56,796 INFO L226 Difference]: Without dead ends: 13 [2023-02-18 00:36:56,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 00:36:56,802 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:56,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-18 00:36:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-18 00:36:56,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2023-02-18 00:36:56,830 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2023-02-18 00:36:56,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:56,830 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2023-02-18 00:36:56,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:56,831 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2023-02-18 00:36:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 00:36:56,831 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:56,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:56,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 00:36:56,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:56,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:56,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2023-02-18 00:36:56,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:56,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236519830] [2023-02-18 00:36:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:56,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:56,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:56,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236519830] [2023-02-18 00:36:56,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236519830] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:36:56,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:36:56,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 00:36:56,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193940239] [2023-02-18 00:36:56,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:36:56,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 00:36:56,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:56,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 00:36:56,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:36:56,980 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:57,018 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2023-02-18 00:36:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 00:36:57,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2023-02-18 00:36:57,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:57,019 INFO L225 Difference]: With dead ends: 27 [2023-02-18 00:36:57,019 INFO L226 Difference]: Without dead ends: 18 [2023-02-18 00:36:57,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 00:36:57,020 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:57,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-18 00:36:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-18 00:36:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2023-02-18 00:36:57,025 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 12 [2023-02-18 00:36:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:57,025 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2023-02-18 00:36:57,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2023-02-18 00:36:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 00:36:57,026 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:57,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:57,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 00:36:57,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:57,027 INFO L85 PathProgramCache]: Analyzing trace with hash 415981709, now seen corresponding path program 1 times [2023-02-18 00:36:57,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:57,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270850504] [2023-02-18 00:36:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:57,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:57,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:57,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270850504] [2023-02-18 00:36:57,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270850504] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:36:57,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:36:57,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 00:36:57,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569068043] [2023-02-18 00:36:57,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:36:57,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 00:36:57,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:57,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 00:36:57,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 00:36:57,059 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:57,077 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2023-02-18 00:36:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 00:36:57,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 00:36:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:57,078 INFO L225 Difference]: With dead ends: 41 [2023-02-18 00:36:57,079 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 00:36:57,079 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 [2023-02-18 00:36:57,080 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:57,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 00:36:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 00:36:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 41 transitions. [2023-02-18 00:36:57,087 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 41 transitions. Word has length 13 [2023-02-18 00:36:57,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:57,087 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 41 transitions. [2023-02-18 00:36:57,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2023-02-18 00:36:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 00:36:57,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:57,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:57,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 00:36:57,089 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash 461234238, now seen corresponding path program 1 times [2023-02-18 00:36:57,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:57,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467168641] [2023-02-18 00:36:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:57,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:57,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467168641] [2023-02-18 00:36:57,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467168641] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:36:57,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:36:57,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 00:36:57,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793107363] [2023-02-18 00:36:57,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:36:57,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 00:36:57,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:57,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 00:36:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 00:36:57,110 INFO L87 Difference]: Start difference. First operand 28 states and 41 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:57,129 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2023-02-18 00:36:57,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 00:36:57,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 00:36:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:57,130 INFO L225 Difference]: With dead ends: 43 [2023-02-18 00:36:57,130 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 00:36:57,131 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 [2023-02-18 00:36:57,132 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:57,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 00:36:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-18 00:36:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2023-02-18 00:36:57,138 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 13 [2023-02-18 00:36:57,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:57,139 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2023-02-18 00:36:57,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2023-02-18 00:36:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 00:36:57,139 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:57,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:57,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 00:36:57,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:57,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:57,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1348188691, now seen corresponding path program 1 times [2023-02-18 00:36:57,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:57,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153277323] [2023-02-18 00:36:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:57,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:57,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:57,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153277323] [2023-02-18 00:36:57,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153277323] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:36:57,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:36:57,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 00:36:57,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150518769] [2023-02-18 00:36:57,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:36:57,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 00:36:57,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:57,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 00:36:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:36:57,180 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:57,211 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-02-18 00:36:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 00:36:57,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 00:36:57,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:57,212 INFO L225 Difference]: With dead ends: 41 [2023-02-18 00:36:57,212 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 00:36:57,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 00:36:57,213 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:57,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:57,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 00:36:57,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 00:36:57,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2023-02-18 00:36:57,219 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2023-02-18 00:36:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:57,219 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2023-02-18 00:36:57,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2023-02-18 00:36:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 00:36:57,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:57,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:57,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 00:36:57,220 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:57,221 INFO L85 PathProgramCache]: Analyzing trace with hash 121782348, now seen corresponding path program 1 times [2023-02-18 00:36:57,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:57,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86928654] [2023-02-18 00:36:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:57,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:57,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:57,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86928654] [2023-02-18 00:36:57,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86928654] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:57,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208072281] [2023-02-18 00:36:57,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:57,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:57,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:57,269 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) [2023-02-18 00:36:57,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 00:36:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:57,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 00:36:57,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:57,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:57,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208072281] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:57,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 00:36:57,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-02-18 00:36:57,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242259845] [2023-02-18 00:36:57,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:36:57,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 00:36:57,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:57,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 00:36:57,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-18 00:36:57,388 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:57,419 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-02-18 00:36:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 00:36:57,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 00:36:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:57,420 INFO L225 Difference]: With dead ends: 35 [2023-02-18 00:36:57,420 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 00:36:57,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-18 00:36:57,424 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:57,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 00:36:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-18 00:36:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2023-02-18 00:36:57,433 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 15 [2023-02-18 00:36:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:57,433 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2023-02-18 00:36:57,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2023-02-18 00:36:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 00:36:57,434 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:57,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:57,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 00:36:57,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-18 00:36:57,639 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1019268824, now seen corresponding path program 1 times [2023-02-18 00:36:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:57,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031799200] [2023-02-18 00:36:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:57,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:36:57,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031799200] [2023-02-18 00:36:57,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031799200] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019432199] [2023-02-18 00:36:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:57,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:57,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:57,712 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) [2023-02-18 00:36:57,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 00:36:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:57,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:36:57,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:57,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:36:57,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019432199] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:57,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:57,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 9 [2023-02-18 00:36:57,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167650056] [2023-02-18 00:36:57,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:57,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 00:36:57,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 00:36:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:36:57,786 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:57,856 INFO L93 Difference]: Finished difference Result 99 states and 146 transitions. [2023-02-18 00:36:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 00:36:57,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 00:36:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:57,858 INFO L225 Difference]: With dead ends: 99 [2023-02-18 00:36:57,858 INFO L226 Difference]: Without dead ends: 82 [2023-02-18 00:36:57,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-02-18 00:36:57,859 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:57,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 80 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-18 00:36:57,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2023-02-18 00:36:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2023-02-18 00:36:57,868 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 16 [2023-02-18 00:36:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:57,868 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2023-02-18 00:36:57,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2023-02-18 00:36:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 00:36:57,869 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:57,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:57,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:58,073 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,SelfDestructingSolverStorable6 [2023-02-18 00:36:58,074 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1475655800, now seen corresponding path program 1 times [2023-02-18 00:36:58,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:58,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225741970] [2023-02-18 00:36:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:58,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:58,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:58,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225741970] [2023-02-18 00:36:58,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225741970] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:58,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118551794] [2023-02-18 00:36:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:58,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:58,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:58,118 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) [2023-02-18 00:36:58,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 00:36:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 00:36:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:58,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:58,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118551794] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:58,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:58,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-18 00:36:58,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761451873] [2023-02-18 00:36:58,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:58,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 00:36:58,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 00:36:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:36:58,194 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:58,231 INFO L93 Difference]: Finished difference Result 101 states and 144 transitions. [2023-02-18 00:36:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 00:36:58,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 00:36:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:58,232 INFO L225 Difference]: With dead ends: 101 [2023-02-18 00:36:58,232 INFO L226 Difference]: Without dead ends: 94 [2023-02-18 00:36:58,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:36:58,233 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:58,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-18 00:36:58,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2023-02-18 00:36:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.5) internal successors, (96), 64 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 96 transitions. [2023-02-18 00:36:58,242 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 96 transitions. Word has length 16 [2023-02-18 00:36:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:58,242 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 96 transitions. [2023-02-18 00:36:58,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:58,242 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 96 transitions. [2023-02-18 00:36:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 00:36:58,243 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:58,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:58,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:58,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:58,448 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2038983293, now seen corresponding path program 1 times [2023-02-18 00:36:58,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:58,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404075023] [2023-02-18 00:36:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:58,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:58,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:58,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404075023] [2023-02-18 00:36:58,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404075023] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:58,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810619234] [2023-02-18 00:36:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:58,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:58,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:58,521 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) [2023-02-18 00:36:58,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 00:36:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:58,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:36:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:36:58,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:36:58,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810619234] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:58,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:58,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2023-02-18 00:36:58,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001776273] [2023-02-18 00:36:58,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:58,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 00:36:58,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:58,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 00:36:58,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-02-18 00:36:58,617 INFO L87 Difference]: Start difference. First operand 65 states and 96 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:58,726 INFO L93 Difference]: Finished difference Result 126 states and 190 transitions. [2023-02-18 00:36:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 00:36:58,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 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 17 [2023-02-18 00:36:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:58,727 INFO L225 Difference]: With dead ends: 126 [2023-02-18 00:36:58,727 INFO L226 Difference]: Without dead ends: 97 [2023-02-18 00:36:58,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:36:58,727 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:58,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 53 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:36:58,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-18 00:36:58,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2023-02-18 00:36:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 83 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:58,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 121 transitions. [2023-02-18 00:36:58,739 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 121 transitions. Word has length 17 [2023-02-18 00:36:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:58,739 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 121 transitions. [2023-02-18 00:36:58,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:58,739 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 121 transitions. [2023-02-18 00:36:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 00:36:58,740 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:58,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:58,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:58,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:58,945 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:58,945 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2023-02-18 00:36:58,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:58,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380765474] [2023-02-18 00:36:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:58,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:59,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:59,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380765474] [2023-02-18 00:36:59,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380765474] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:59,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123065288] [2023-02-18 00:36:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:59,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:59,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:59,019 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) [2023-02-18 00:36:59,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 00:36:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:59,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 00:36:59,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:59,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:59,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123065288] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:59,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:59,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-02-18 00:36:59,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053287991] [2023-02-18 00:36:59,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:59,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 00:36:59,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 00:36:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 00:36:59,124 INFO L87 Difference]: Start difference. First operand 84 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:59,165 INFO L93 Difference]: Finished difference Result 137 states and 200 transitions. [2023-02-18 00:36:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 00:36:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 00:36:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:59,166 INFO L225 Difference]: With dead ends: 137 [2023-02-18 00:36:59,166 INFO L226 Difference]: Without dead ends: 95 [2023-02-18 00:36:59,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 00:36:59,167 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:59,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-18 00:36:59,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2023-02-18 00:36:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.472972972972973) internal successors, (109), 74 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 109 transitions. [2023-02-18 00:36:59,178 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 109 transitions. Word has length 18 [2023-02-18 00:36:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:59,178 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 109 transitions. [2023-02-18 00:36:59,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 109 transitions. [2023-02-18 00:36:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 00:36:59,179 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:59,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:59,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:59,384 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,SelfDestructingSolverStorable9 [2023-02-18 00:36:59,384 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:59,385 INFO L85 PathProgramCache]: Analyzing trace with hash 91906733, now seen corresponding path program 2 times [2023-02-18 00:36:59,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:59,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124534635] [2023-02-18 00:36:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:59,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 00:36:59,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:59,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124534635] [2023-02-18 00:36:59,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124534635] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:59,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538772192] [2023-02-18 00:36:59,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:36:59,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:59,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:59,428 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) [2023-02-18 00:36:59,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 00:36:59,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:36:59,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:59,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:36:59,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 00:36:59,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 00:36:59,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538772192] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:59,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:59,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-02-18 00:36:59,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139906537] [2023-02-18 00:36:59,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:59,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 00:36:59,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 00:36:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:36:59,503 INFO L87 Difference]: Start difference. First operand 75 states and 109 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:59,638 INFO L93 Difference]: Finished difference Result 138 states and 198 transitions. [2023-02-18 00:36:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 00:36:59,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 00:36:59,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:59,638 INFO L225 Difference]: With dead ends: 138 [2023-02-18 00:36:59,639 INFO L226 Difference]: Without dead ends: 94 [2023-02-18 00:36:59,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:36:59,639 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:59,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 105 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:36:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-18 00:36:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2023-02-18 00:36:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 69 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 103 transitions. [2023-02-18 00:36:59,649 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 103 transitions. Word has length 19 [2023-02-18 00:36:59,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:59,649 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 103 transitions. [2023-02-18 00:36:59,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 103 transitions. [2023-02-18 00:36:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 00:36:59,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:59,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:59,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 00:36:59,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:59,854 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1779216382, now seen corresponding path program 2 times [2023-02-18 00:36:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:59,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162162614] [2023-02-18 00:36:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:59,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:59,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162162614] [2023-02-18 00:36:59,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162162614] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688753776] [2023-02-18 00:36:59,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:36:59,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:59,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:59,923 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) [2023-02-18 00:36:59,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 00:36:59,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:36:59,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:59,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:36:59,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 00:36:59,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 00:36:59,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688753776] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:59,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:59,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-18 00:36:59,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954919945] [2023-02-18 00:36:59,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:59,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 00:36:59,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:59,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 00:36:59,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-18 00:36:59,980 INFO L87 Difference]: Start difference. First operand 70 states and 103 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:00,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:00,282 INFO L93 Difference]: Finished difference Result 186 states and 255 transitions. [2023-02-18 00:37:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 00:37:00,282 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 00:37:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:00,283 INFO L225 Difference]: With dead ends: 186 [2023-02-18 00:37:00,283 INFO L226 Difference]: Without dead ends: 152 [2023-02-18 00:37:00,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:37:00,283 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:00,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 155 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:37:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-18 00:37:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 89. [2023-02-18 00:37:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3636363636363635) internal successors, (120), 88 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2023-02-18 00:37:00,297 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 19 [2023-02-18 00:37:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:00,297 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2023-02-18 00:37:00,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2023-02-18 00:37:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 00:37:00,298 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:00,298 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:00,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:00,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:00,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2078405228, now seen corresponding path program 3 times [2023-02-18 00:37:00,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:00,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706782597] [2023-02-18 00:37:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:00,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 00:37:00,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:00,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706782597] [2023-02-18 00:37:00,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706782597] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:00,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057565310] [2023-02-18 00:37:00,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:37:00,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:00,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:00,562 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) [2023-02-18 00:37:00,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 00:37:00,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 00:37:00,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:00,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 00:37:00,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 00:37:00,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 00:37:00,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057565310] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:00,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:00,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2023-02-18 00:37:00,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213651058] [2023-02-18 00:37:00,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:00,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 00:37:00,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:00,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 00:37:00,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:37:00,663 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:01,030 INFO L93 Difference]: Finished difference Result 208 states and 292 transitions. [2023-02-18 00:37:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 00:37:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 00:37:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:01,031 INFO L225 Difference]: With dead ends: 208 [2023-02-18 00:37:01,031 INFO L226 Difference]: Without dead ends: 141 [2023-02-18 00:37:01,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:37:01,032 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 87 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:01,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 182 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:37:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-18 00:37:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2023-02-18 00:37:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 84 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2023-02-18 00:37:01,045 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 21 [2023-02-18 00:37:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:01,045 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2023-02-18 00:37:01,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2023-02-18 00:37:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 00:37:01,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:01,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:01,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:01,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 00:37:01,251 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:01,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash 856330056, now seen corresponding path program 3 times [2023-02-18 00:37:01,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:01,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968606016] [2023-02-18 00:37:01,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:01,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:01,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:01,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968606016] [2023-02-18 00:37:01,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968606016] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:01,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982948864] [2023-02-18 00:37:01,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:37:01,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:01,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:01,390 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) [2023-02-18 00:37:01,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 00:37:01,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 00:37:01,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:01,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:37:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 00:37:01,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 00:37:01,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982948864] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:01,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:01,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-18 00:37:01,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362031757] [2023-02-18 00:37:01,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:01,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 00:37:01,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:01,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 00:37:01,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:37:01,475 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:02,130 INFO L93 Difference]: Finished difference Result 242 states and 317 transitions. [2023-02-18 00:37:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-18 00:37:02,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 00:37:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:02,132 INFO L225 Difference]: With dead ends: 242 [2023-02-18 00:37:02,132 INFO L226 Difference]: Without dead ends: 206 [2023-02-18 00:37:02,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:37:02,133 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 164 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:02,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 241 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:37:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-18 00:37:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 106. [2023-02-18 00:37:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3428571428571427) internal successors, (141), 105 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2023-02-18 00:37:02,146 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 22 [2023-02-18 00:37:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:02,146 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2023-02-18 00:37:02,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2023-02-18 00:37:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 00:37:02,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:02,147 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:02,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-18 00:37:02,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 00:37:02,352 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:02,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1537171731, now seen corresponding path program 4 times [2023-02-18 00:37:02,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:02,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203549401] [2023-02-18 00:37:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:02,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 00:37:02,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:02,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203549401] [2023-02-18 00:37:02,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203549401] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:02,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692589] [2023-02-18 00:37:02,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:37:02,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:02,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:02,447 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) [2023-02-18 00:37:02,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 00:37:02,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:37:02,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:02,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:37:02,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 00:37:02,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 00:37:02,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692589] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:02,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:02,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 7] total 18 [2023-02-18 00:37:02,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156146381] [2023-02-18 00:37:02,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:02,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:37:02,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:02,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:37:02,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:37:02,583 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:03,061 INFO L93 Difference]: Finished difference Result 204 states and 298 transitions. [2023-02-18 00:37:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 00:37:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 00:37:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:03,062 INFO L225 Difference]: With dead ends: 204 [2023-02-18 00:37:03,062 INFO L226 Difference]: Without dead ends: 168 [2023-02-18 00:37:03,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:37:03,063 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 61 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:03,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 203 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:37:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-18 00:37:03,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2023-02-18 00:37:03,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3870967741935485) internal successors, (172), 124 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) [2023-02-18 00:37:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2023-02-18 00:37:03,080 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 23 [2023-02-18 00:37:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:03,080 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2023-02-18 00:37:03,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:03,081 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2023-02-18 00:37:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 00:37:03,081 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:03,081 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:03,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-18 00:37:03,285 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,SelfDestructingSolverStorable14 [2023-02-18 00:37:03,286 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash 257480285, now seen corresponding path program 2 times [2023-02-18 00:37:03,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:03,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802486673] [2023-02-18 00:37:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:03,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:37:03,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:03,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802486673] [2023-02-18 00:37:03,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802486673] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:03,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066155771] [2023-02-18 00:37:03,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:37:03,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:03,356 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) [2023-02-18 00:37:03,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 00:37:03,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:37:03,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:37:03,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:03,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:37:03,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066155771] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:03,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:03,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 18 [2023-02-18 00:37:03,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724090964] [2023-02-18 00:37:03,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:03,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:37:03,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:03,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:37:03,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:37:03,506 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:03,733 INFO L93 Difference]: Finished difference Result 313 states and 468 transitions. [2023-02-18 00:37:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 00:37:03,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 00:37:03,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:03,734 INFO L225 Difference]: With dead ends: 313 [2023-02-18 00:37:03,734 INFO L226 Difference]: Without dead ends: 256 [2023-02-18 00:37:03,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:37:03,735 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 110 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:03,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 183 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:37:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-02-18 00:37:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2023-02-18 00:37:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.3657142857142857) internal successors, (239), 175 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 239 transitions. [2023-02-18 00:37:03,757 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 239 transitions. Word has length 23 [2023-02-18 00:37:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:03,757 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 239 transitions. [2023-02-18 00:37:03,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 239 transitions. [2023-02-18 00:37:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 00:37:03,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:03,758 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:03,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:03,962 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,SelfDestructingSolverStorable15 [2023-02-18 00:37:03,962 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:03,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:03,962 INFO L85 PathProgramCache]: Analyzing trace with hash -235040834, now seen corresponding path program 4 times [2023-02-18 00:37:03,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:03,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491371027] [2023-02-18 00:37:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:03,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:04,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:04,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491371027] [2023-02-18 00:37:04,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491371027] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:04,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634941016] [2023-02-18 00:37:04,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:37:04,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:04,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:04,093 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) [2023-02-18 00:37:04,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 00:37:04,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:37:04,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:04,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:37:04,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 00:37:04,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 00:37:04,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634941016] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:04,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:04,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2023-02-18 00:37:04,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640546984] [2023-02-18 00:37:04,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:04,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:37:04,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:04,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:37:04,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:37:04,201 INFO L87 Difference]: Start difference. First operand 176 states and 239 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:06,166 INFO L93 Difference]: Finished difference Result 600 states and 786 transitions. [2023-02-18 00:37:06,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-02-18 00:37:06,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 00:37:06,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:06,175 INFO L225 Difference]: With dead ends: 600 [2023-02-18 00:37:06,175 INFO L226 Difference]: Without dead ends: 544 [2023-02-18 00:37:06,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4534 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1023, Invalid=11859, Unknown=0, NotChecked=0, Total=12882 [2023-02-18 00:37:06,178 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 386 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:06,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 257 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 00:37:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2023-02-18 00:37:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 200. [2023-02-18 00:37:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.3668341708542713) internal successors, (272), 199 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) [2023-02-18 00:37:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 272 transitions. [2023-02-18 00:37:06,208 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 272 transitions. Word has length 25 [2023-02-18 00:37:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:06,208 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 272 transitions. [2023-02-18 00:37:06,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 272 transitions. [2023-02-18 00:37:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 00:37:06,209 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:06,209 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:06,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:06,413 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,SelfDestructingSolverStorable16 [2023-02-18 00:37:06,413 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:06,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:06,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1883036162, now seen corresponding path program 1 times [2023-02-18 00:37:06,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:06,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414187395] [2023-02-18 00:37:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:06,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 00:37:06,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:06,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414187395] [2023-02-18 00:37:06,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414187395] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:06,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194696960] [2023-02-18 00:37:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:06,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:06,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:06,525 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) [2023-02-18 00:37:06,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 00:37:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:06,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:37:06,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:37:06,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 00:37:06,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194696960] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:06,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:06,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 8] total 22 [2023-02-18 00:37:06,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006846470] [2023-02-18 00:37:06,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:06,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 00:37:06,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 00:37:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:37:06,773 INFO L87 Difference]: Start difference. First operand 200 states and 272 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:07,552 INFO L93 Difference]: Finished difference Result 390 states and 566 transitions. [2023-02-18 00:37:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-18 00:37:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 00:37:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:07,553 INFO L225 Difference]: With dead ends: 390 [2023-02-18 00:37:07,553 INFO L226 Difference]: Without dead ends: 298 [2023-02-18 00:37:07,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=535, Invalid=3125, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 00:37:07,555 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 99 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:07,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 285 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:37:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-02-18 00:37:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 212. [2023-02-18 00:37:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.3649289099526067) internal successors, (288), 211 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 288 transitions. [2023-02-18 00:37:07,592 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 288 transitions. Word has length 25 [2023-02-18 00:37:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:07,592 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 288 transitions. [2023-02-18 00:37:07,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 288 transitions. [2023-02-18 00:37:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 00:37:07,593 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:07,593 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:07,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-18 00:37:07,797 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,SelfDestructingSolverStorable17 [2023-02-18 00:37:07,797 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:07,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1999602746, now seen corresponding path program 3 times [2023-02-18 00:37:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:07,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869552836] [2023-02-18 00:37:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:07,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 00:37:07,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:07,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869552836] [2023-02-18 00:37:07,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869552836] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:07,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024473075] [2023-02-18 00:37:07,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:37:07,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:07,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:07,939 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) [2023-02-18 00:37:07,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 00:37:08,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 00:37:08,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:08,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:37:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 00:37:08,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 00:37:08,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024473075] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:08,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:08,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2023-02-18 00:37:08,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101418223] [2023-02-18 00:37:08,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:08,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 00:37:08,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:08,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 00:37:08,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-18 00:37:08,073 INFO L87 Difference]: Start difference. First operand 212 states and 288 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:08,358 INFO L93 Difference]: Finished difference Result 426 states and 557 transitions. [2023-02-18 00:37:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 00:37:08,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 00:37:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:08,359 INFO L225 Difference]: With dead ends: 426 [2023-02-18 00:37:08,360 INFO L226 Difference]: Without dead ends: 396 [2023-02-18 00:37:08,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:37:08,360 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 86 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:08,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 118 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:37:08,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-02-18 00:37:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 216. [2023-02-18 00:37:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.3534883720930233) internal successors, (291), 215 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 291 transitions. [2023-02-18 00:37:08,400 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 291 transitions. Word has length 26 [2023-02-18 00:37:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:08,401 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 291 transitions. [2023-02-18 00:37:08,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 291 transitions. [2023-02-18 00:37:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 00:37:08,401 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:08,401 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:08,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:08,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:08,621 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:08,622 INFO L85 PathProgramCache]: Analyzing trace with hash -866986772, now seen corresponding path program 2 times [2023-02-18 00:37:08,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:08,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142394917] [2023-02-18 00:37:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:08,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 00:37:08,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:08,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142394917] [2023-02-18 00:37:08,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142394917] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:08,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859994255] [2023-02-18 00:37:08,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:37:08,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:08,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:08,740 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) [2023-02-18 00:37:08,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 00:37:08,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:37:08,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:08,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:37:08,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 00:37:08,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 00:37:08,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859994255] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:08,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:08,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 6] total 18 [2023-02-18 00:37:08,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001407850] [2023-02-18 00:37:08,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:08,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:37:08,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:37:08,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:37:08,887 INFO L87 Difference]: Start difference. First operand 216 states and 291 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:09,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:09,262 INFO L93 Difference]: Finished difference Result 476 states and 693 transitions. [2023-02-18 00:37:09,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 00:37:09,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 00:37:09,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:09,263 INFO L225 Difference]: With dead ends: 476 [2023-02-18 00:37:09,263 INFO L226 Difference]: Without dead ends: 425 [2023-02-18 00:37:09,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-02-18 00:37:09,264 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 144 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:09,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 383 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:37:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-02-18 00:37:09,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 248. [2023-02-18 00:37:09,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.3360323886639676) internal successors, (330), 247 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:09,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 330 transitions. [2023-02-18 00:37:09,321 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 330 transitions. Word has length 27 [2023-02-18 00:37:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:09,322 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 330 transitions. [2023-02-18 00:37:09,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 330 transitions. [2023-02-18 00:37:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 00:37:09,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:09,323 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:09,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-18 00:37:09,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:09,531 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:09,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash -18086136, now seen corresponding path program 5 times [2023-02-18 00:37:09,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:09,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377200519] [2023-02-18 00:37:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:09,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:09,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377200519] [2023-02-18 00:37:09,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377200519] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:09,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761047787] [2023-02-18 00:37:09,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:37:09,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:09,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:09,675 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:09,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 00:37:09,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 00:37:09,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:09,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:37:09,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:09,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:37:10,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761047787] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:10,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:10,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 13] total 33 [2023-02-18 00:37:10,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307261964] [2023-02-18 00:37:10,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:10,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 00:37:10,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:10,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 00:37:10,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:37:10,057 INFO L87 Difference]: Start difference. First operand 248 states and 330 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:11,566 INFO L93 Difference]: Finished difference Result 539 states and 795 transitions. [2023-02-18 00:37:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-18 00:37:11,566 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-18 00:37:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:11,567 INFO L225 Difference]: With dead ends: 539 [2023-02-18 00:37:11,568 INFO L226 Difference]: Without dead ends: 472 [2023-02-18 00:37:11,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1797, Invalid=5685, Unknown=0, NotChecked=0, Total=7482 [2023-02-18 00:37:11,569 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 281 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:11,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 389 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 00:37:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-02-18 00:37:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 312. [2023-02-18 00:37:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.3569131832797428) internal successors, (422), 311 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2023-02-18 00:37:11,644 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 28 [2023-02-18 00:37:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:11,644 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2023-02-18 00:37:11,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2023-02-18 00:37:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 00:37:11,645 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:11,645 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:11,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:11,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:11,850 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:11,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2063179469, now seen corresponding path program 4 times [2023-02-18 00:37:11,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:11,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806481268] [2023-02-18 00:37:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:11,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:37:11,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:11,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806481268] [2023-02-18 00:37:11,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806481268] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:11,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564233109] [2023-02-18 00:37:11,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:37:11,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:11,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:11,971 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:11,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 00:37:12,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:37:12,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:12,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:37:12,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:37:12,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-18 00:37:12,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564233109] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:12,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:12,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 5] total 17 [2023-02-18 00:37:12,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102731591] [2023-02-18 00:37:12,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:12,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 00:37:12,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:12,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 00:37:12,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:37:12,123 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:12,545 INFO L93 Difference]: Finished difference Result 627 states and 919 transitions. [2023-02-18 00:37:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 00:37:12,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 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 29 [2023-02-18 00:37:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:12,547 INFO L225 Difference]: With dead ends: 627 [2023-02-18 00:37:12,547 INFO L226 Difference]: Without dead ends: 545 [2023-02-18 00:37:12,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2023-02-18 00:37:12,548 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 114 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:12,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 439 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:37:12,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-02-18 00:37:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 347. [2023-02-18 00:37:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.3641618497109826) internal successors, (472), 346 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 472 transitions. [2023-02-18 00:37:12,631 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 472 transitions. Word has length 29 [2023-02-18 00:37:12,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:12,631 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 472 transitions. [2023-02-18 00:37:12,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 472 transitions. [2023-02-18 00:37:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 00:37:12,632 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:12,632 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:12,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:12,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:12,837 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:12,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 5 times [2023-02-18 00:37:12,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:12,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119610781] [2023-02-18 00:37:12,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:12,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 00:37:12,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:12,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119610781] [2023-02-18 00:37:12,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119610781] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:12,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140096322] [2023-02-18 00:37:12,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:37:12,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:12,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:12,960 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:12,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 00:37:13,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 00:37:13,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:13,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 00:37:13,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 00:37:13,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 00:37:13,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140096322] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:13,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:13,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-02-18 00:37:13,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632213436] [2023-02-18 00:37:13,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:13,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 00:37:13,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 00:37:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 00:37:13,090 INFO L87 Difference]: Start difference. First operand 347 states and 472 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:13,338 INFO L93 Difference]: Finished difference Result 573 states and 770 transitions. [2023-02-18 00:37:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 00:37:13,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 00:37:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:13,340 INFO L225 Difference]: With dead ends: 573 [2023-02-18 00:37:13,340 INFO L226 Difference]: Without dead ends: 458 [2023-02-18 00:37:13,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 17 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:37:13,340 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:13,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 139 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:37:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2023-02-18 00:37:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 340. [2023-02-18 00:37:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.3628318584070795) internal successors, (462), 339 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 462 transitions. [2023-02-18 00:37:13,424 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 462 transitions. Word has length 30 [2023-02-18 00:37:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:13,424 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 462 transitions. [2023-02-18 00:37:13,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 462 transitions. [2023-02-18 00:37:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 00:37:13,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:13,425 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:13,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:13,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:13,630 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:13,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:13,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1044326056, now seen corresponding path program 6 times [2023-02-18 00:37:13,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:13,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379735259] [2023-02-18 00:37:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:13,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 00:37:13,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:13,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379735259] [2023-02-18 00:37:13,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379735259] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:13,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864987378] [2023-02-18 00:37:13,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:37:13,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:13,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:13,763 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:13,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 00:37:13,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 00:37:13,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:13,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:37:13,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 00:37:13,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 00:37:13,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864987378] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:13,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:13,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2023-02-18 00:37:13,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16532293] [2023-02-18 00:37:13,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:13,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 00:37:13,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:13,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 00:37:13,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:37:13,911 INFO L87 Difference]: Start difference. First operand 340 states and 462 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:18,406 INFO L93 Difference]: Finished difference Result 1057 states and 1334 transitions. [2023-02-18 00:37:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-02-18 00:37:18,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 00:37:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:18,420 INFO L225 Difference]: With dead ends: 1057 [2023-02-18 00:37:18,420 INFO L226 Difference]: Without dead ends: 972 [2023-02-18 00:37:18,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9400 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1822, Invalid=22984, Unknown=0, NotChecked=0, Total=24806 [2023-02-18 00:37:18,426 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 411 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:18,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 432 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 00:37:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2023-02-18 00:37:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 358. [2023-02-18 00:37:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.3641456582633054) internal successors, (487), 357 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 487 transitions. [2023-02-18 00:37:18,558 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 487 transitions. Word has length 30 [2023-02-18 00:37:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:18,559 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 487 transitions. [2023-02-18 00:37:18,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 487 transitions. [2023-02-18 00:37:18,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 00:37:18,560 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:18,560 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:18,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:18,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:18,769 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:18,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:18,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1370456194, now seen corresponding path program 7 times [2023-02-18 00:37:18,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:18,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223790588] [2023-02-18 00:37:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:18,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:18,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:18,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223790588] [2023-02-18 00:37:18,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223790588] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:18,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170483168] [2023-02-18 00:37:18,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:37:18,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:18,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:18,951 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:18,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 00:37:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:18,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:37:18,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 00:37:19,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 00:37:19,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170483168] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:19,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:19,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-02-18 00:37:19,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625157619] [2023-02-18 00:37:19,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:19,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 00:37:19,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 00:37:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2023-02-18 00:37:19,099 INFO L87 Difference]: Start difference. First operand 358 states and 487 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:29,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:29,273 INFO L93 Difference]: Finished difference Result 1299 states and 1654 transitions. [2023-02-18 00:37:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2023-02-18 00:37:29,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 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 31 [2023-02-18 00:37:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:29,276 INFO L225 Difference]: With dead ends: 1299 [2023-02-18 00:37:29,276 INFO L226 Difference]: Without dead ends: 1219 [2023-02-18 00:37:29,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30317 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3844, Invalid=68786, Unknown=0, NotChecked=0, Total=72630 [2023-02-18 00:37:29,280 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 760 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 3346 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 3792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 3346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:29,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 671 Invalid, 3792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 3346 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-18 00:37:29,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2023-02-18 00:37:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 392. [2023-02-18 00:37:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.3682864450127876) internal successors, (535), 391 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 535 transitions. [2023-02-18 00:37:29,438 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 535 transitions. Word has length 31 [2023-02-18 00:37:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:29,438 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 535 transitions. [2023-02-18 00:37:29,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 535 transitions. [2023-02-18 00:37:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 00:37:29,439 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:29,439 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:29,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-18 00:37:29,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 00:37:29,644 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:29,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash 306595180, now seen corresponding path program 3 times [2023-02-18 00:37:29,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:29,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844232047] [2023-02-18 00:37:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:29,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 00:37:29,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:29,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844232047] [2023-02-18 00:37:29,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844232047] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:29,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875743401] [2023-02-18 00:37:29,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:37:29,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:29,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:29,794 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:29,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 00:37:29,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 00:37:29,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:29,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:37:29,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-02-18 00:37:29,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-02-18 00:37:30,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875743401] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:30,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:30,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 25 [2023-02-18 00:37:30,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354135062] [2023-02-18 00:37:30,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:30,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 00:37:30,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:30,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 00:37:30,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-02-18 00:37:30,007 INFO L87 Difference]: Start difference. First operand 392 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:30,922 INFO L93 Difference]: Finished difference Result 744 states and 1106 transitions. [2023-02-18 00:37:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-18 00:37:30,923 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 00:37:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:30,924 INFO L225 Difference]: With dead ends: 744 [2023-02-18 00:37:30,925 INFO L226 Difference]: Without dead ends: 641 [2023-02-18 00:37:30,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=565, Invalid=2627, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 00:37:30,925 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 259 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:30,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 546 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:37:30,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2023-02-18 00:37:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 444. [2023-02-18 00:37:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.3702031602708804) internal successors, (607), 443 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 607 transitions. [2023-02-18 00:37:31,085 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 607 transitions. Word has length 31 [2023-02-18 00:37:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:31,085 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 607 transitions. [2023-02-18 00:37:31,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 607 transitions. [2023-02-18 00:37:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 00:37:31,086 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:31,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:31,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:31,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 00:37:31,290 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:31,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash 380203431, now seen corresponding path program 6 times [2023-02-18 00:37:31,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:31,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587016046] [2023-02-18 00:37:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:31,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 00:37:31,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:31,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587016046] [2023-02-18 00:37:31,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587016046] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:31,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598746068] [2023-02-18 00:37:31,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:37:31,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:31,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:31,429 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:31,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 00:37:31,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 00:37:31,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:31,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:37:31,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 00:37:31,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 00:37:31,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598746068] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:31,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:31,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2023-02-18 00:37:31,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021770338] [2023-02-18 00:37:31,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:31,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 00:37:31,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 00:37:31,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:37:31,584 INFO L87 Difference]: Start difference. First operand 444 states and 607 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:32,662 INFO L93 Difference]: Finished difference Result 1030 states and 1333 transitions. [2023-02-18 00:37:32,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 00:37:32,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-18 00:37:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:32,665 INFO L225 Difference]: With dead ends: 1030 [2023-02-18 00:37:32,665 INFO L226 Difference]: Without dead ends: 966 [2023-02-18 00:37:32,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-02-18 00:37:32,666 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 143 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:32,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 215 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:37:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2023-02-18 00:37:32,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 469. [2023-02-18 00:37:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.356837606837607) internal successors, (635), 468 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 635 transitions. [2023-02-18 00:37:32,898 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 635 transitions. Word has length 32 [2023-02-18 00:37:32,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:32,898 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 635 transitions. [2023-02-18 00:37:32,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 635 transitions. [2023-02-18 00:37:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 00:37:32,899 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:32,899 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:32,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:33,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 00:37:33,103 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:33,104 INFO L85 PathProgramCache]: Analyzing trace with hash 541073756, now seen corresponding path program 4 times [2023-02-18 00:37:33,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:33,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725602342] [2023-02-18 00:37:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:33,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:37:33,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:33,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725602342] [2023-02-18 00:37:33,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725602342] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:33,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757681939] [2023-02-18 00:37:33,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:37:33,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:33,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:33,285 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:33,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 00:37:33,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:37:33,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:33,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:37:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 00:37:33,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-18 00:37:33,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757681939] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:33,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:33,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 6] total 21 [2023-02-18 00:37:33,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180529996] [2023-02-18 00:37:33,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:33,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 00:37:33,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:33,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 00:37:33,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:37:33,560 INFO L87 Difference]: Start difference. First operand 469 states and 635 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:34,410 INFO L93 Difference]: Finished difference Result 918 states and 1345 transitions. [2023-02-18 00:37:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 00:37:34,411 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 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 33 [2023-02-18 00:37:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:34,412 INFO L225 Difference]: With dead ends: 918 [2023-02-18 00:37:34,413 INFO L226 Difference]: Without dead ends: 821 [2023-02-18 00:37:34,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 00:37:34,413 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 207 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:34,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 629 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:37:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2023-02-18 00:37:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 575. [2023-02-18 00:37:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3397212543554007) internal successors, (769), 574 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 769 transitions. [2023-02-18 00:37:34,618 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 769 transitions. Word has length 33 [2023-02-18 00:37:34,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:34,619 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 769 transitions. [2023-02-18 00:37:34,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 769 transitions. [2023-02-18 00:37:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 00:37:34,620 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:34,620 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:34,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:34,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:34,824 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:34,825 INFO L85 PathProgramCache]: Analyzing trace with hash 89661625, now seen corresponding path program 5 times [2023-02-18 00:37:34,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:34,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304455089] [2023-02-18 00:37:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:34,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 00:37:34,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:34,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304455089] [2023-02-18 00:37:34,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304455089] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:34,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55437781] [2023-02-18 00:37:34,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:37:34,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:34,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:34,978 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:34,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 00:37:35,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 00:37:35,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:35,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 00:37:35,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 00:37:35,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 00:37:35,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55437781] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:35,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:35,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-18 00:37:35,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431860301] [2023-02-18 00:37:35,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:35,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 00:37:35,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:35,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 00:37:35,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:37:35,587 INFO L87 Difference]: Start difference. First operand 575 states and 769 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:48,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:38:48,134 INFO L93 Difference]: Finished difference Result 1560 states and 2226 transitions. [2023-02-18 00:38:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 493 states. [2023-02-18 00:38:48,135 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 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 34 [2023-02-18 00:38:48,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:38:48,139 INFO L225 Difference]: With dead ends: 1560 [2023-02-18 00:38:48,139 INFO L226 Difference]: Without dead ends: 1258 [2023-02-18 00:38:48,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116698 ImplicationChecksByTransitivity, 65.6s TimeCoverageRelationStatistics Valid=24240, Invalid=231290, Unknown=0, NotChecked=0, Total=255530 [2023-02-18 00:38:48,150 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2000 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 1355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2000 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 3009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1355 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:38:48,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2000 Valid, 330 Invalid, 3009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1355 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-02-18 00:38:48,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2023-02-18 00:38:48,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 935. [2023-02-18 00:38:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 1.455032119914347) internal successors, (1359), 934 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1359 transitions. [2023-02-18 00:38:48,619 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1359 transitions. Word has length 34 [2023-02-18 00:38:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:38:48,619 INFO L495 AbstractCegarLoop]: Abstraction has 935 states and 1359 transitions. [2023-02-18 00:38:48,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1359 transitions. [2023-02-18 00:38:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 00:38:48,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:38:48,621 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:38:48,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 00:38:48,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 00:38:48,827 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:38:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:38:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash 386903752, now seen corresponding path program 8 times [2023-02-18 00:38:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:38:48,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086156744] [2023-02-18 00:38:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:38:48,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:38:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:38:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:38:49,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:38:49,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086156744] [2023-02-18 00:38:49,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086156744] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:38:49,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229395449] [2023-02-18 00:38:49,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:38:49,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:38:49,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:38:49,061 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:38:49,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 00:38:49,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:38:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:38:49,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:38:49,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:38:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-18 00:38:49,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:38:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-18 00:38:49,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229395449] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:38:49,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:38:49,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2023-02-18 00:38:49,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292351069] [2023-02-18 00:38:49,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:38:49,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 00:38:49,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:38:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 00:38:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2023-02-18 00:38:49,262 INFO L87 Difference]: Start difference. First operand 935 states and 1359 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:39:18,786 INFO L93 Difference]: Finished difference Result 2743 states and 3709 transitions. [2023-02-18 00:39:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 371 states. [2023-02-18 00:39:18,786 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 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 34 [2023-02-18 00:39:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:39:18,792 INFO L225 Difference]: With dead ends: 2743 [2023-02-18 00:39:18,792 INFO L226 Difference]: Without dead ends: 2582 [2023-02-18 00:39:18,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65170 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=6843, Invalid=141767, Unknown=0, NotChecked=0, Total=148610 [2023-02-18 00:39:18,797 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1228 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 4775 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 5703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 4775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:39:18,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 595 Invalid, 5703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 4775 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-02-18 00:39:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2023-02-18 00:39:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 994. [2023-02-18 00:39:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 1.4290030211480362) internal successors, (1419), 993 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1419 transitions. [2023-02-18 00:39:19,309 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1419 transitions. Word has length 34 [2023-02-18 00:39:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:39:19,309 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 1419 transitions. [2023-02-18 00:39:19,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1419 transitions. [2023-02-18 00:39:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 00:39:19,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:39:19,310 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:39:19,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 00:39:19,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:39:19,515 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:39:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:39:19,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 7 times [2023-02-18 00:39:19,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:39:19,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94653012] [2023-02-18 00:39:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:39:19,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:39:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:39:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 00:39:19,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:39:19,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94653012] [2023-02-18 00:39:19,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94653012] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:39:19,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404829239] [2023-02-18 00:39:19,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:39:19,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:39:19,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:39:19,691 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:39:19,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 00:39:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:39:19,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 00:39:19,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:39:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 00:39:19,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:39:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 00:39:19,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404829239] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:39:19,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:39:19,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2023-02-18 00:39:19,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523256956] [2023-02-18 00:39:19,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:39:19,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 00:39:19,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:39:19,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 00:39:19,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:39:19,814 INFO L87 Difference]: Start difference. First operand 994 states and 1419 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:39:21,038 INFO L93 Difference]: Finished difference Result 1588 states and 2214 transitions. [2023-02-18 00:39:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 00:39:21,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-18 00:39:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:39:21,042 INFO L225 Difference]: With dead ends: 1588 [2023-02-18 00:39:21,042 INFO L226 Difference]: Without dead ends: 1315 [2023-02-18 00:39:21,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 20 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-18 00:39:21,043 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:39:21,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 223 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:39:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2023-02-18 00:39:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 986. [2023-02-18 00:39:21,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.43248730964467) internal successors, (1411), 985 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:21,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1411 transitions. [2023-02-18 00:39:21,561 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1411 transitions. Word has length 36 [2023-02-18 00:39:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:39:21,561 INFO L495 AbstractCegarLoop]: Abstraction has 986 states and 1411 transitions. [2023-02-18 00:39:21,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1411 transitions. [2023-02-18 00:39:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 00:39:21,562 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:39:21,563 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:39:21,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 00:39:21,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-02-18 00:39:21,767 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:39:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:39:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash 532015789, now seen corresponding path program 6 times [2023-02-18 00:39:21,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:39:21,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648073111] [2023-02-18 00:39:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:39:21,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:39:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:39:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-18 00:39:21,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:39:21,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648073111] [2023-02-18 00:39:21,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648073111] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:39:21,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008099544] [2023-02-18 00:39:21,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:39:21,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:39:21,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:39:21,977 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:39:21,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 00:39:22,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 00:39:22,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:39:22,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:39:22,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:39:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 00:39:22,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:39:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 00:39:22,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008099544] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:39:22,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:39:22,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2023-02-18 00:39:22,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514305023] [2023-02-18 00:39:22,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:39:22,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 00:39:22,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:39:22,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 00:39:22,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2023-02-18 00:39:22,264 INFO L87 Difference]: Start difference. First operand 986 states and 1411 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:39:42,150 INFO L93 Difference]: Finished difference Result 2706 states and 3519 transitions. [2023-02-18 00:39:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2023-02-18 00:39:42,151 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 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 37 [2023-02-18 00:39:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:39:42,156 INFO L225 Difference]: With dead ends: 2706 [2023-02-18 00:39:42,156 INFO L226 Difference]: Without dead ends: 2576 [2023-02-18 00:39:42,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49225 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=5863, Invalid=108719, Unknown=0, NotChecked=0, Total=114582 [2023-02-18 00:39:42,169 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 929 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:39:42,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 724 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-02-18 00:39:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2023-02-18 00:39:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 969. [2023-02-18 00:39:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 1.4287190082644627) internal successors, (1383), 968 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1383 transitions. [2023-02-18 00:39:42,766 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1383 transitions. Word has length 37 [2023-02-18 00:39:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:39:42,766 INFO L495 AbstractCegarLoop]: Abstraction has 969 states and 1383 transitions. [2023-02-18 00:39:42,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1383 transitions. [2023-02-18 00:39:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 00:39:42,767 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:39:42,767 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:39:42,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 00:39:42,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:39:42,972 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:39:42,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:39:42,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1963294526, now seen corresponding path program 9 times [2023-02-18 00:39:42,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:39:42,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600065952] [2023-02-18 00:39:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:39:42,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:39:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:39:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:39:43,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:39:43,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600065952] [2023-02-18 00:39:43,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600065952] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:39:43,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230128136] [2023-02-18 00:39:43,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:39:43,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:39:43,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:39:43,189 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:39:43,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 00:39:43,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 00:39:43,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:39:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:39:43,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:39:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 00:39:43,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:39:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 00:39:43,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230128136] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:39:43,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:39:43,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2023-02-18 00:39:43,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931900917] [2023-02-18 00:39:43,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:39:43,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 00:39:43,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:39:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 00:39:43,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2023-02-18 00:39:43,501 INFO L87 Difference]: Start difference. First operand 969 states and 1383 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:40:39,187 INFO L93 Difference]: Finished difference Result 3064 states and 4073 transitions. [2023-02-18 00:40:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 490 states. [2023-02-18 00:40:39,188 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 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 37 [2023-02-18 00:40:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:40:39,194 INFO L225 Difference]: With dead ends: 3064 [2023-02-18 00:40:39,194 INFO L226 Difference]: Without dead ends: 2938 [2023-02-18 00:40:39,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 505 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114805 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=10403, Invalid=246139, Unknown=0, NotChecked=0, Total=256542 [2023-02-18 00:40:39,202 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1352 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 6169 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 7063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 6169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-02-18 00:40:39,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 897 Invalid, 7063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 6169 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-02-18 00:40:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2023-02-18 00:40:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1103. [2023-02-18 00:40:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1102 states have (on average 1.4047186932849365) internal successors, (1548), 1102 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1548 transitions. [2023-02-18 00:40:39,806 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1548 transitions. Word has length 37 [2023-02-18 00:40:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:40:39,807 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 1548 transitions. [2023-02-18 00:40:39,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1548 transitions. [2023-02-18 00:40:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 00:40:39,808 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:40:39,808 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:40:39,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-02-18 00:40:40,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:40,013 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:40:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:40:40,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1262752116, now seen corresponding path program 8 times [2023-02-18 00:40:40,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:40:40,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831833534] [2023-02-18 00:40:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:40:40,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:40:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:40:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 00:40:40,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:40:40,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831833534] [2023-02-18 00:40:40,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831833534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:40:40,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265002175] [2023-02-18 00:40:40,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:40:40,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:40,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:40:40,224 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:40:40,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 00:40:40,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:40:40,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:40:40,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:40:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:40:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 00:40:40,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:40:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-18 00:40:40,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265002175] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:40:40,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:40:40,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 8] total 28 [2023-02-18 00:40:40,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918090593] [2023-02-18 00:40:40,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:40:40,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 00:40:40,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:40:40,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 00:40:40,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2023-02-18 00:40:40,542 INFO L87 Difference]: Start difference. First operand 1103 states and 1548 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:40:43,470 INFO L93 Difference]: Finished difference Result 1723 states and 2524 transitions. [2023-02-18 00:40:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-18 00:40:43,471 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 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 37 [2023-02-18 00:40:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:40:43,474 INFO L225 Difference]: With dead ends: 1723 [2023-02-18 00:40:43,474 INFO L226 Difference]: Without dead ends: 1443 [2023-02-18 00:40:43,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 52 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=482, Invalid=6324, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 00:40:43,475 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 139 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 00:40:43,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1366 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 00:40:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2023-02-18 00:40:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1025. [2023-02-18 00:40:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 1.3994140625) internal successors, (1433), 1024 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1433 transitions. [2023-02-18 00:40:44,124 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1433 transitions. Word has length 37 [2023-02-18 00:40:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:40:44,124 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 1433 transitions. [2023-02-18 00:40:44,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1433 transitions. [2023-02-18 00:40:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 00:40:44,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:40:44,126 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:40:44,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-18 00:40:44,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:44,330 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:40:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:40:44,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1506070490, now seen corresponding path program 9 times [2023-02-18 00:40:44,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:40:44,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108977316] [2023-02-18 00:40:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:40:44,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:40:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:40:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 00:40:44,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:40:44,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108977316] [2023-02-18 00:40:44,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108977316] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:40:44,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136560485] [2023-02-18 00:40:44,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:40:44,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:40:44,504 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:40:44,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 00:40:44,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 00:40:44,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:40:44,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:40:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:40:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 00:40:44,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:40:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 00:40:44,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136560485] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:40:44,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:40:44,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2023-02-18 00:40:44,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440854274] [2023-02-18 00:40:44,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:40:44,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:40:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:40:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:40:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:40:44,810 INFO L87 Difference]: Start difference. First operand 1025 states and 1433 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:40:50,910 INFO L93 Difference]: Finished difference Result 2283 states and 3043 transitions. [2023-02-18 00:40:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-18 00:40:50,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 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 38 [2023-02-18 00:40:50,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:40:50,915 INFO L225 Difference]: With dead ends: 2283 [2023-02-18 00:40:50,915 INFO L226 Difference]: Without dead ends: 2152 [2023-02-18 00:40:50,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=1229, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 00:40:50,916 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 231 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 00:40:50,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 312 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 00:40:50,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2023-02-18 00:40:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1048. [2023-02-18 00:40:51,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 1.396370582617001) internal successors, (1462), 1047 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1462 transitions. [2023-02-18 00:40:51,597 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1462 transitions. Word has length 38 [2023-02-18 00:40:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:40:51,597 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 1462 transitions. [2023-02-18 00:40:51,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1462 transitions. [2023-02-18 00:40:51,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 00:40:51,599 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:40:51,599 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:40:51,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-18 00:40:51,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-18 00:40:51,804 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:40:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:40:51,805 INFO L85 PathProgramCache]: Analyzing trace with hash -397409032, now seen corresponding path program 10 times [2023-02-18 00:40:51,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:40:51,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684850657] [2023-02-18 00:40:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:40:51,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:40:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:40:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 00:40:52,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:40:52,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684850657] [2023-02-18 00:40:52,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684850657] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:40:52,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347443178] [2023-02-18 00:40:52,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:40:52,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:52,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:40:52,017 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:40:52,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-18 00:40:52,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:40:52,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:40:52,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 00:40:52,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:40:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 00:40:52,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:40:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-18 00:40:52,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347443178] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:40:52,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:40:52,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 6] total 25 [2023-02-18 00:40:52,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171419923] [2023-02-18 00:40:52,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:40:52,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 00:40:52,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:40:52,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 00:40:52,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-02-18 00:40:52,302 INFO L87 Difference]: Start difference. First operand 1048 states and 1462 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:40:54,437 INFO L93 Difference]: Finished difference Result 1849 states and 2757 transitions. [2023-02-18 00:40:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 00:40:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 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 38 [2023-02-18 00:40:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:40:54,441 INFO L225 Difference]: With dead ends: 1849 [2023-02-18 00:40:54,441 INFO L226 Difference]: Without dead ends: 1526 [2023-02-18 00:40:54,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 21 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 00:40:54,442 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 285 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:40:54,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1215 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 00:40:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2023-02-18 00:40:55,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1021. [2023-02-18 00:40:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 1.4009803921568627) internal successors, (1429), 1020 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1429 transitions. [2023-02-18 00:40:55,197 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1429 transitions. Word has length 38 [2023-02-18 00:40:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:40:55,197 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1429 transitions. [2023-02-18 00:40:55,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1429 transitions. [2023-02-18 00:40:55,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 00:40:55,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:40:55,214 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:40:55,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-18 00:40:55,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-18 00:40:55,419 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:40:55,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:40:55,420 INFO L85 PathProgramCache]: Analyzing trace with hash 924657721, now seen corresponding path program 7 times [2023-02-18 00:40:55,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:40:55,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320187335] [2023-02-18 00:40:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:40:55,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:40:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:40:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-18 00:40:55,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:40:55,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320187335] [2023-02-18 00:40:55,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320187335] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:40:55,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767555057] [2023-02-18 00:40:55,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:40:55,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:55,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:40:55,629 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:40:55,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-18 00:40:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:40:55,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:40:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:40:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 00:40:55,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:40:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 00:40:55,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767555057] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:40:55,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:40:55,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2023-02-18 00:40:55,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412368011] [2023-02-18 00:40:55,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:40:55,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 00:40:55,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:40:55,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 00:40:55,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2023-02-18 00:40:55,862 INFO L87 Difference]: Start difference. First operand 1021 states and 1429 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:41:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:41:45,309 INFO L93 Difference]: Finished difference Result 3374 states and 4221 transitions. [2023-02-18 00:41:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 449 states. [2023-02-18 00:41:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 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 40 [2023-02-18 00:41:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:41:45,329 INFO L225 Difference]: With dead ends: 3374 [2023-02-18 00:41:45,330 INFO L226 Difference]: Without dead ends: 3231 [2023-02-18 00:41:45,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 456 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92956 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=9802, Invalid=199504, Unknown=0, NotChecked=0, Total=209306 [2023-02-18 00:41:45,337 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 1185 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 3737 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 4541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 3737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-02-18 00:41:45,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 950 Invalid, 4541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 3737 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-02-18 00:41:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2023-02-18 00:41:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 1012. [2023-02-18 00:41:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 1.3966369930761622) internal successors, (1412), 1011 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:41:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1412 transitions. [2023-02-18 00:41:46,101 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1412 transitions. Word has length 40 [2023-02-18 00:41:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:41:46,101 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 1412 transitions. [2023-02-18 00:41:46,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:41:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1412 transitions. [2023-02-18 00:41:46,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 00:41:46,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:41:46,102 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:41:46,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-18 00:41:46,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:41:46,310 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:41:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:41:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1143634296, now seen corresponding path program 10 times [2023-02-18 00:41:46,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:41:46,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076262620] [2023-02-18 00:41:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:41:46,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:41:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:41:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:41:46,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:41:46,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076262620] [2023-02-18 00:41:46,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076262620] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:41:46,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80760176] [2023-02-18 00:41:46,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:41:46,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:41:46,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:41:46,588 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:41:46,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-18 00:41:46,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:41:46,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:41:46,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:41:46,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:41:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-18 00:41:46,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:41:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-18 00:41:46,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80760176] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:41:46,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:41:46,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2023-02-18 00:41:46,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108255511] [2023-02-18 00:41:46,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:41:46,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 00:41:46,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:41:46,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 00:41:46,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:41:46,848 INFO L87 Difference]: Start difference. First operand 1012 states and 1412 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:43:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:43:56,714 INFO L93 Difference]: Finished difference Result 3847 states and 4917 transitions. [2023-02-18 00:43:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 654 states. [2023-02-18 00:43:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 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 40 [2023-02-18 00:43:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:43:56,725 INFO L225 Difference]: With dead ends: 3847 [2023-02-18 00:43:56,725 INFO L226 Difference]: Without dead ends: 3717 [2023-02-18 00:43:56,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 671 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207223 ImplicationChecksByTransitivity, 99.2s TimeCoverageRelationStatistics Valid=16692, Invalid=435563, Unknown=1, NotChecked=0, Total=452256 [2023-02-18 00:43:56,741 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1714 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 8660 mSolverCounterSat, 1330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 9990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1330 IncrementalHoareTripleChecker+Valid, 8660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:43:56,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1714 Valid, 1030 Invalid, 9990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1330 Valid, 8660 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2023-02-18 00:43:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3717 states. [2023-02-18 00:43:57,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3717 to 1118. [2023-02-18 00:43:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 1.387645478961504) internal successors, (1550), 1117 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:43:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1550 transitions. [2023-02-18 00:43:57,670 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1550 transitions. Word has length 40 [2023-02-18 00:43:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:43:57,671 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1550 transitions. [2023-02-18 00:43:57,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:43:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1550 transitions. [2023-02-18 00:43:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 00:43:57,672 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:43:57,672 INFO L195 NwaCegarLoop]: trace histogram [15, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:43:57,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-18 00:43:57,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-18 00:43:57,881 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:43:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:43:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash 105920185, now seen corresponding path program 5 times [2023-02-18 00:43:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:43:57,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298918190] [2023-02-18 00:43:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:43:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:43:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:43:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 00:43:58,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:43:58,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298918190] [2023-02-18 00:43:58,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298918190] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:43:58,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214551041] [2023-02-18 00:43:58,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:43:58,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:43:58,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:43:58,142 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:43:58,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-18 00:43:59,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-18 00:43:59,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:43:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 00:43:59,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:44:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 00:44:00,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:44:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2023-02-18 00:44:00,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214551041] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:44:00,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:44:00,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 10] total 36 [2023-02-18 00:44:00,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848783091] [2023-02-18 00:44:00,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:44:00,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 00:44:00,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:44:00,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 00:44:00,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 00:44:00,160 INFO L87 Difference]: Start difference. First operand 1118 states and 1550 transitions. Second operand has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:44:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:44:03,294 INFO L93 Difference]: Finished difference Result 2020 states and 3003 transitions. [2023-02-18 00:44:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 00:44:03,295 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 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 40 [2023-02-18 00:44:03,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:44:03,297 INFO L225 Difference]: With dead ends: 2020 [2023-02-18 00:44:03,297 INFO L226 Difference]: Without dead ends: 1584 [2023-02-18 00:44:03,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 18 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=2144, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:44:03,298 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 384 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2200 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 00:44:03,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 1400 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2200 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 00:44:03,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2023-02-18 00:44:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1163. [2023-02-18 00:44:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 1.3648881239242685) internal successors, (1586), 1162 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:44:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1586 transitions. [2023-02-18 00:44:04,447 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1586 transitions. Word has length 40 [2023-02-18 00:44:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:44:04,447 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1586 transitions. [2023-02-18 00:44:04,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:44:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1586 transitions. [2023-02-18 00:44:04,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 00:44:04,448 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:44:04,448 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:44:04,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-18 00:44:04,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-18 00:44:04,654 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:44:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:44:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2041166362, now seen corresponding path program 11 times [2023-02-18 00:44:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:44:04,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657546776] [2023-02-18 00:44:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:44:04,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:44:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:44:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 00:44:04,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:44:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657546776] [2023-02-18 00:44:04,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657546776] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:44:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777776155] [2023-02-18 00:44:04,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:44:04,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:44:04,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:44:04,809 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:44:04,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-18 00:44:05,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 00:44:05,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:44:05,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 00:44:05,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:44:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 00:44:05,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:44:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 00:44:05,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777776155] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:44:05,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:44:05,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2023-02-18 00:44:05,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363193226] [2023-02-18 00:44:05,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:44:05,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 00:44:05,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:44:05,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 00:44:05,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-18 00:44:05,343 INFO L87 Difference]: Start difference. First operand 1163 states and 1586 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:44:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:44:09,813 INFO L93 Difference]: Finished difference Result 2014 states and 2700 transitions. [2023-02-18 00:44:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 00:44:09,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-18 00:44:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:44:09,816 INFO L225 Difference]: With dead ends: 2014 [2023-02-18 00:44:09,816 INFO L226 Difference]: Without dead ends: 1713 [2023-02-18 00:44:09,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 44 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-18 00:44:09,817 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 35 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:44:09,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 308 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:44:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2023-02-18 00:44:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1153. [2023-02-18 00:44:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.3680555555555556) internal successors, (1576), 1152 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:44:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1576 transitions. [2023-02-18 00:44:11,094 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1576 transitions. Word has length 42 [2023-02-18 00:44:11,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:44:11,094 INFO L495 AbstractCegarLoop]: Abstraction has 1153 states and 1576 transitions. [2023-02-18 00:44:11,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:44:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1576 transitions. [2023-02-18 00:44:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 00:44:11,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:44:11,095 INFO L195 NwaCegarLoop]: trace histogram [16, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:44:11,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-18 00:44:11,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-18 00:44:11,300 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:44:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:44:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1584609880, now seen corresponding path program 8 times [2023-02-18 00:44:11,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:44:11,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275706707] [2023-02-18 00:44:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:44:11,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:44:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:44:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 00:44:11,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:44:11,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275706707] [2023-02-18 00:44:11,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275706707] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:44:11,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034028937] [2023-02-18 00:44:11,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:44:11,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:44:11,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:44:11,542 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:44:11,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-18 00:44:11,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:44:11,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:44:11,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 00:44:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:44:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 00:44:11,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:44:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-02-18 00:44:11,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034028937] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:44:11,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:44:11,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 10] total 35 [2023-02-18 00:44:11,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619527015] [2023-02-18 00:44:11,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:44:11,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 00:44:11,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:44:11,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 00:44:11,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 00:44:11,949 INFO L87 Difference]: Start difference. First operand 1153 states and 1576 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:44:18,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:44:18,740 INFO L93 Difference]: Finished difference Result 1977 states and 2909 transitions. [2023-02-18 00:44:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-02-18 00:44:18,741 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 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 42 [2023-02-18 00:44:18,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:44:18,743 INFO L225 Difference]: With dead ends: 1977 [2023-02-18 00:44:18,743 INFO L226 Difference]: Without dead ends: 1540 [2023-02-18 00:44:18,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 56 SyntacticMatches, 17 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4635 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=878, Invalid=15124, Unknown=0, NotChecked=0, Total=16002 [2023-02-18 00:44:18,744 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 205 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:44:18,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1703 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 00:44:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2023-02-18 00:44:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1176. [2023-02-18 00:44:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 1.3651063829787233) internal successors, (1604), 1175 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:44:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1604 transitions. [2023-02-18 00:44:20,084 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1604 transitions. Word has length 42 [2023-02-18 00:44:20,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:44:20,084 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1604 transitions. [2023-02-18 00:44:20,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:44:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1604 transitions. [2023-02-18 00:44:20,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:44:20,086 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:44:20,086 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:44:20,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-18 00:44:20,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:44:20,288 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:44:20,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:44:20,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1263287635, now seen corresponding path program 9 times [2023-02-18 00:44:20,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:44:20,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089191739] [2023-02-18 00:44:20,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:44:20,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:44:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:44:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 00:44:20,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:44:20,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089191739] [2023-02-18 00:44:20,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089191739] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:44:20,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167671148] [2023-02-18 00:44:20,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:44:20,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:44:20,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:44:20,613 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:44:20,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-18 00:44:20,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 00:44:20,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:44:20,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 00:44:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:44:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-18 00:44:21,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:44:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-18 00:44:21,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167671148] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:44:21,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:44:21,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2023-02-18 00:44:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135660956] [2023-02-18 00:44:21,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:44:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 00:44:21,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:44:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 00:44:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:44:21,112 INFO L87 Difference]: Start difference. First operand 1176 states and 1604 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:46:14,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:46:14,203 INFO L93 Difference]: Finished difference Result 4249 states and 5250 transitions. [2023-02-18 00:46:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 582 states. [2023-02-18 00:46:14,203 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 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 43 [2023-02-18 00:46:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:46:14,208 INFO L225 Difference]: With dead ends: 4249 [2023-02-18 00:46:14,208 INFO L226 Difference]: Without dead ends: 4057 [2023-02-18 00:46:14,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 590 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159054 ImplicationChecksByTransitivity, 63.3s TimeCoverageRelationStatistics Valid=15093, Invalid=334779, Unknown=0, NotChecked=0, Total=349872 [2023-02-18 00:46:14,219 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1472 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 5269 mSolverCounterSat, 1115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 6384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1115 IncrementalHoareTripleChecker+Valid, 5269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2023-02-18 00:46:14,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1472 Valid, 1253 Invalid, 6384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1115 Valid, 5269 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time] [2023-02-18 00:46:14,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2023-02-18 00:46:15,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 1172. [2023-02-18 00:46:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 1.362937660119556) internal successors, (1596), 1171 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:46:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1596 transitions. [2023-02-18 00:46:15,662 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1596 transitions. Word has length 43 [2023-02-18 00:46:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:46:15,663 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 1596 transitions. [2023-02-18 00:46:15,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:46:15,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1596 transitions. [2023-02-18 00:46:15,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:46:15,664 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:46:15,664 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:46:15,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-02-18 00:46:15,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:46:15,879 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:46:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:46:15,879 INFO L85 PathProgramCache]: Analyzing trace with hash -149123330, now seen corresponding path program 11 times [2023-02-18 00:46:15,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:46:15,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233049584] [2023-02-18 00:46:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:46:15,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:46:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:46:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:46:16,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:46:16,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233049584] [2023-02-18 00:46:16,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233049584] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:46:16,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92813411] [2023-02-18 00:46:16,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:46:16,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:46:16,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:46:16,182 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:46:16,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-18 00:46:18,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-18 00:46:18,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:46:18,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 00:46:18,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:46:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:46:18,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:46:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-18 00:46:19,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92813411] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:46:19,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:46:19,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 34, 23] total 58 [2023-02-18 00:46:19,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055032642] [2023-02-18 00:46:19,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:46:19,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-18 00:46:19,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:46:19,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-18 00:46:19,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=2667, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 00:46:19,497 INFO L87 Difference]: Start difference. First operand 1172 states and 1596 transitions. Second operand has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 58 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:46:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:46:41,669 INFO L93 Difference]: Finished difference Result 2302 states and 3468 transitions. [2023-02-18 00:46:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2023-02-18 00:46:41,669 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 58 states have internal predecessors, (88), 0 states have call successors, (0), 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 43 [2023-02-18 00:46:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:46:41,672 INFO L225 Difference]: With dead ends: 2302 [2023-02-18 00:46:41,672 INFO L226 Difference]: Without dead ends: 2143 [2023-02-18 00:46:41,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 44 SyntacticMatches, 19 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17437 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=10750, Invalid=37430, Unknown=0, NotChecked=0, Total=48180 [2023-02-18 00:46:41,674 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 837 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 7102 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 7725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 7102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-02-18 00:46:41,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1377 Invalid, 7725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 7102 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-02-18 00:46:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2023-02-18 00:46:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1351. [2023-02-18 00:46:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 1.3651851851851853) internal successors, (1843), 1350 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:46:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1843 transitions. [2023-02-18 00:46:43,259 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1843 transitions. Word has length 43 [2023-02-18 00:46:43,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:46:43,259 INFO L495 AbstractCegarLoop]: Abstraction has 1351 states and 1843 transitions. [2023-02-18 00:46:43,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 58 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:46:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1843 transitions. [2023-02-18 00:46:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:46:43,261 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:46:43,261 INFO L195 NwaCegarLoop]: trace histogram [17, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:46:43,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-02-18 00:46:43,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-02-18 00:46:43,466 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:46:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:46:43,467 INFO L85 PathProgramCache]: Analyzing trace with hash 888229484, now seen corresponding path program 6 times [2023-02-18 00:46:43,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:46:43,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162501492] [2023-02-18 00:46:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:46:43,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:46:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:46:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 00:46:43,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:46:43,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162501492] [2023-02-18 00:46:43,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162501492] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:46:43,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537568083] [2023-02-18 00:46:43,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:46:43,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:46:43,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:46:43,782 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:46:43,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-18 00:46:43,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 00:46:43,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:46:43,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:46:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:46:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-02-18 00:46:43,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:46:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-02-18 00:46:43,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537568083] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:46:43,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:46:43,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 30 [2023-02-18 00:46:43,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963244014] [2023-02-18 00:46:43,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:46:43,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 00:46:43,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:46:43,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 00:46:43,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2023-02-18 00:46:43,955 INFO L87 Difference]: Start difference. First operand 1351 states and 1843 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:46:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:46:53,302 INFO L93 Difference]: Finished difference Result 2399 states and 3447 transitions. [2023-02-18 00:46:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2023-02-18 00:46:53,303 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 00:46:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:46:53,318 INFO L225 Difference]: With dead ends: 2399 [2023-02-18 00:46:53,324 INFO L226 Difference]: Without dead ends: 1964 [2023-02-18 00:46:53,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13095 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1984, Invalid=34688, Unknown=0, NotChecked=0, Total=36672 [2023-02-18 00:46:53,327 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 271 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 5234 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 5571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 5234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:46:53,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 1392 Invalid, 5571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 5234 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-18 00:46:53,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2023-02-18 00:46:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1360. [2023-02-18 00:46:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 1.3546725533480501) internal successors, (1841), 1359 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:46:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1841 transitions. [2023-02-18 00:46:54,997 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1841 transitions. Word has length 43 [2023-02-18 00:46:54,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:46:54,997 INFO L495 AbstractCegarLoop]: Abstraction has 1360 states and 1841 transitions. [2023-02-18 00:46:54,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:46:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1841 transitions. [2023-02-18 00:46:54,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 00:46:54,998 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:46:54,999 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:46:55,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-02-18 00:46:55,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-02-18 00:46:55,203 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:46:55,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:46:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1169722809, now seen corresponding path program 12 times [2023-02-18 00:46:55,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:46:55,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657870762] [2023-02-18 00:46:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:46:55,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:46:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:46:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-18 00:46:55,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:46:55,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657870762] [2023-02-18 00:46:55,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657870762] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:46:55,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164133459] [2023-02-18 00:46:55,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:46:55,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:46:55,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:46:55,404 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:46:55,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-18 00:46:55,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 00:46:55,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:46:55,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:46:55,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:46:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-02-18 00:46:55,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:46:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-02-18 00:46:55,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164133459] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:46:55,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:46:55,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2023-02-18 00:46:55,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531169790] [2023-02-18 00:46:55,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:46:55,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 00:46:55,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:46:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 00:46:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:46:55,719 INFO L87 Difference]: Start difference. First operand 1360 states and 1841 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:47:24,532 INFO L93 Difference]: Finished difference Result 3646 states and 4689 transitions. [2023-02-18 00:47:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 00:47:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-18 00:47:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:47:24,537 INFO L225 Difference]: With dead ends: 3646 [2023-02-18 00:47:24,537 INFO L226 Difference]: Without dead ends: 3476 [2023-02-18 00:47:24,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 13 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=659, Invalid=2763, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:47:24,538 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 518 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-02-18 00:47:24,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 332 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-02-18 00:47:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2023-02-18 00:47:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 1444. [2023-02-18 00:47:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 1.3617463617463617) internal successors, (1965), 1443 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1965 transitions. [2023-02-18 00:47:26,234 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1965 transitions. Word has length 44 [2023-02-18 00:47:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:47:26,234 INFO L495 AbstractCegarLoop]: Abstraction has 1444 states and 1965 transitions. [2023-02-18 00:47:26,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1965 transitions. [2023-02-18 00:47:26,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 00:47:26,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:47:26,236 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:47:26,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-18 00:47:26,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-18 00:47:26,440 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:47:26,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:47:26,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1519867188, now seen corresponding path program 12 times [2023-02-18 00:47:26,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:47:26,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645602901] [2023-02-18 00:47:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:26,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:47:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-18 00:47:26,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:47:26,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645602901] [2023-02-18 00:47:26,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645602901] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:47:26,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910434017] [2023-02-18 00:47:26,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:47:26,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:26,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:47:26,718 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:47:26,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-18 00:47:26,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 00:47:26,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:47:26,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 00:47:26,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:47:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:27,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:47:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-18 00:47:28,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910434017] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:47:28,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:47:28,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 36, 24] total 59 [2023-02-18 00:47:28,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049153809] [2023-02-18 00:47:28,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:47:28,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 00:47:28,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:47:28,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 00:47:28,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2758, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:47:28,080 INFO L87 Difference]: Start difference. First operand 1444 states and 1965 transitions. Second operand has 59 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 59 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:50:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:50:13,618 INFO L93 Difference]: Finished difference Result 2646 states and 3783 transitions. [2023-02-18 00:50:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2023-02-18 00:50:13,619 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 59 states have internal predecessors, (92), 0 states have call successors, (0), 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 45 [2023-02-18 00:50:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:50:13,622 INFO L225 Difference]: With dead ends: 2646 [2023-02-18 00:50:13,622 INFO L226 Difference]: Without dead ends: 2446 [2023-02-18 00:50:13,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 35 SyntacticMatches, 22 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70267 ImplicationChecksByTransitivity, 132.9s TimeCoverageRelationStatistics Valid=14942, Invalid=157698, Unknown=0, NotChecked=0, Total=172640 [2023-02-18 00:50:13,629 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1257 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 6446 mSolverCounterSat, 1420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 7866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1420 IncrementalHoareTripleChecker+Valid, 6446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:50:13,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1257 Valid, 758 Invalid, 7866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1420 Valid, 6446 Invalid, 0 Unknown, 0 Unchecked, 30.2s Time] [2023-02-18 00:50:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2023-02-18 00:50:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1517. [2023-02-18 00:50:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 1.370712401055409) internal successors, (2078), 1516 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:50:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2078 transitions. [2023-02-18 00:50:15,524 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2078 transitions. Word has length 45 [2023-02-18 00:50:15,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:50:15,525 INFO L495 AbstractCegarLoop]: Abstraction has 1517 states and 2078 transitions. [2023-02-18 00:50:15,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 59 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:50:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2078 transitions. [2023-02-18 00:50:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 00:50:15,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:50:15,526 INFO L195 NwaCegarLoop]: trace histogram [18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:50:15,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-18 00:50:15,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-18 00:50:15,734 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:50:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:50:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash 536931070, now seen corresponding path program 7 times [2023-02-18 00:50:15,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:50:15,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591949098] [2023-02-18 00:50:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:50:15,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:50:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:50:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 00:50:16,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:50:16,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591949098] [2023-02-18 00:50:16,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591949098] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:50:16,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34158910] [2023-02-18 00:50:16,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:50:16,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:50:16,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:50:16,101 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:50:16,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-18 00:50:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:50:16,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-18 00:50:16,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:50:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 00:50:16,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:50:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-02-18 00:50:16,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34158910] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:50:16,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:50:16,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 7] total 31 [2023-02-18 00:50:16,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820140662] [2023-02-18 00:50:16,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:50:16,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 00:50:16,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:50:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 00:50:16,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:50:16,519 INFO L87 Difference]: Start difference. First operand 1517 states and 2078 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:50:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:50:22,441 INFO L93 Difference]: Finished difference Result 2806 states and 4149 transitions. [2023-02-18 00:50:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 00:50:22,441 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-18 00:50:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:50:22,444 INFO L225 Difference]: With dead ends: 2806 [2023-02-18 00:50:22,444 INFO L226 Difference]: Without dead ends: 2346 [2023-02-18 00:50:22,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 64 SyntacticMatches, 26 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=598, Invalid=2158, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:50:22,445 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 433 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 2102 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 00:50:22,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1830 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2102 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 00:50:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2023-02-18 00:50:24,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1525. [2023-02-18 00:50:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 1.370734908136483) internal successors, (2089), 1524 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:50:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2089 transitions. [2023-02-18 00:50:24,373 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2089 transitions. Word has length 45 [2023-02-18 00:50:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:50:24,374 INFO L495 AbstractCegarLoop]: Abstraction has 1525 states and 2089 transitions. [2023-02-18 00:50:24,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:50:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2089 transitions. [2023-02-18 00:50:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 00:50:24,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:50:24,375 INFO L195 NwaCegarLoop]: trace histogram [19, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:50:24,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-18 00:50:24,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:50:24,580 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:50:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:50:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -682259815, now seen corresponding path program 13 times [2023-02-18 00:50:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:50:24,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905830944] [2023-02-18 00:50:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:50:24,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:50:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:50:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 00:50:24,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:50:24,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905830944] [2023-02-18 00:50:24,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905830944] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:50:24,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575209122] [2023-02-18 00:50:24,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:50:24,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:50:24,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:50:24,863 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:50:24,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-18 00:50:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:50:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-18 00:50:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:50:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 00:50:25,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:50:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-02-18 00:50:25,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575209122] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:50:25,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:50:25,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 5] total 29 [2023-02-18 00:50:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776668996] [2023-02-18 00:50:25,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:50:25,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 00:50:25,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:50:25,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 00:50:25,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=754, Unknown=0, NotChecked=0, Total=812 [2023-02-18 00:50:25,171 INFO L87 Difference]: Start difference. First operand 1525 states and 2089 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:50:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:50:30,909 INFO L93 Difference]: Finished difference Result 2560 states and 3742 transitions. [2023-02-18 00:50:30,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-18 00:50:30,910 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-18 00:50:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:50:30,912 INFO L225 Difference]: With dead ends: 2560 [2023-02-18 00:50:30,912 INFO L226 Difference]: Without dead ends: 2094 [2023-02-18 00:50:30,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 68 SyntacticMatches, 21 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=6526, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 00:50:30,914 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 146 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 3510 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2287 SdHoareTripleChecker+Invalid, 3654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:50:30,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 2287 Invalid, 3654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3510 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 00:50:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2023-02-18 00:50:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 1585. [2023-02-18 00:50:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 1.3566919191919191) internal successors, (2149), 1584 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:50:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2149 transitions. [2023-02-18 00:50:32,908 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2149 transitions. Word has length 46 [2023-02-18 00:50:32,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:50:32,909 INFO L495 AbstractCegarLoop]: Abstraction has 1585 states and 2149 transitions. [2023-02-18 00:50:32,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:50:32,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2149 transitions. [2023-02-18 00:50:32,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:50:32,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:50:32,910 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:50:32,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-18 00:50:33,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-18 00:50:33,115 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:50:33,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:50:33,115 INFO L85 PathProgramCache]: Analyzing trace with hash -203414531, now seen corresponding path program 13 times [2023-02-18 00:50:33,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:50:33,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262696877] [2023-02-18 00:50:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:50:33,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:50:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:50:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:50:33,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:50:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262696877] [2023-02-18 00:50:33,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262696877] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:50:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707103322] [2023-02-18 00:50:33,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:50:33,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:50:33,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:50:33,463 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:50:33,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-18 00:50:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:50:33,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 00:50:33,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:50:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-18 00:50:33,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:50:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-18 00:50:33,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707103322] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:50:33,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:50:33,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 39 [2023-02-18 00:50:33,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403798392] [2023-02-18 00:50:33,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:50:33,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 00:50:33,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:50:33,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 00:50:33,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1404, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 00:50:33,835 INFO L87 Difference]: Start difference. First operand 1585 states and 2149 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)