./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de20.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-de20.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 cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 00:29:56,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 00:29:56,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 00:29:57,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 00:29:57,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 00:29:57,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 00:29:57,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 00:29:57,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 00:29:57,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 00:29:57,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 00:29:57,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 00:29:57,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 00:29:57,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 00:29:57,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 00:29:57,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 00:29:57,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 00:29:57,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 00:29:57,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 00:29:57,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 00:29:57,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 00:29:57,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 00:29:57,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 00:29:57,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 00:29:57,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 00:29:57,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 00:29:57,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 00:29:57,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 00:29:57,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 00:29:57,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 00:29:57,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 00:29:57,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 00:29:57,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 00:29:57,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 00:29:57,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 00:29:57,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 00:29:57,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 00:29:57,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 00:29:57,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 00:29:57,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 00:29:57,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 00:29:57,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 00:29:57,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 00:29:57,063 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 00:29:57,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 00:29:57,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 00:29:57,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 00:29:57,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 00:29:57,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 00:29:57,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 00:29:57,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 00:29:57,068 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 00:29:57,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 00:29:57,069 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 00:29:57,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 00:29:57,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 00:29:57,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 00:29:57,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 00:29:57,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 00:29:57,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 00:29:57,070 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 00:29:57,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 00:29:57,070 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 00:29:57,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 00:29:57,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 00:29:57,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 00:29:57,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 00:29:57,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:29:57,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 00:29:57,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 00:29:57,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 00:29:57,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 00:29:57,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 00:29:57,072 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 00:29:57,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 00:29:57,073 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 00:29:57,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 00:29:57,073 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 00:29:57,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd [2023-02-18 00:29:57,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 00:29:57,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 00:29:57,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 00:29:57,288 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 00:29:57,288 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 00:29:57,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de20.c [2023-02-18 00:29:58,251 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 00:29:58,416 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 00:29:58,416 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de20.c [2023-02-18 00:29:58,420 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd6805ec7/fe8c60bdc0cc448d841561a968f67f51/FLAG003813f92 [2023-02-18 00:29:58,433 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd6805ec7/fe8c60bdc0cc448d841561a968f67f51 [2023-02-18 00:29:58,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 00:29:58,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 00:29:58,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 00:29:58,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 00:29:58,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 00:29:58,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fdb62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58, skipping insertion in model container [2023-02-18 00:29:58,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 00:29:58,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 00:29:58,553 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-de20.c[368,381] [2023-02-18 00:29:58,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:29:58,565 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 00:29:58,572 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-de20.c[368,381] [2023-02-18 00:29:58,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:29:58,581 INFO L208 MainTranslator]: Completed translation [2023-02-18 00:29:58,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58 WrapperNode [2023-02-18 00:29:58,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 00:29:58,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 00:29:58,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 00:29:58,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 00:29:58,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,591 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,601 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2023-02-18 00:29:58,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 00:29:58,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 00:29:58,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 00:29:58,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 00:29:58,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,612 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 00:29:58,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 00:29:58,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 00:29:58,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 00:29:58,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (1/1) ... [2023-02-18 00:29:58,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:29:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:29:58,635 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 00:29:58,641 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 00:29:58,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 00:29:58,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 00:29:58,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 00:29:58,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 00:29:58,698 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 00:29:58,700 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 00:29:58,808 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 00:29:58,811 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 00:29:58,813 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 00:29:58,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:29:58 BoogieIcfgContainer [2023-02-18 00:29:58,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 00:29:58,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 00:29:58,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 00:29:58,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 00:29:58,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:29:58" (1/3) ... [2023-02-18 00:29:58,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e21fc3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:29:58, skipping insertion in model container [2023-02-18 00:29:58,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:29:58" (2/3) ... [2023-02-18 00:29:58,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e21fc3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:29:58, skipping insertion in model container [2023-02-18 00:29:58,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:29:58" (3/3) ... [2023-02-18 00:29:58,820 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de20.c [2023-02-18 00:29:58,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 00:29:58,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 00:29:58,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 00:29:58,880 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;@708271c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 00:29:58,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 00:29:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 00:29:58,887 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:58,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:58,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash 239751377, now seen corresponding path program 1 times [2023-02-18 00:29:58,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:58,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600470559] [2023-02-18 00:29:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:58,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:59,214 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 00:29:59,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600470559] [2023-02-18 00:29:59,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600470559] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:29:59,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:29:59,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 00:29:59,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201812212] [2023-02-18 00:29:59,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:29:59,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 00:29:59,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:59,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 00:29:59,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:29:59,273 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 00:29:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:59,331 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2023-02-18 00:29:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 00:29:59,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-02-18 00:29:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:59,338 INFO L225 Difference]: With dead ends: 32 [2023-02-18 00:29:59,338 INFO L226 Difference]: Without dead ends: 12 [2023-02-18 00:29:59,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 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 00:29:59,343 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:59,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:29:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-18 00:29:59,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-18 00:29:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-18 00:29:59,370 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2023-02-18 00:29:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:59,371 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-18 00:29:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 00:29:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-18 00:29:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 00:29:59,372 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:59,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:59,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 00:29:59,373 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1155976521, now seen corresponding path program 1 times [2023-02-18 00:29:59,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:59,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391519547] [2023-02-18 00:29:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:59,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:59,432 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 00:29:59,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:59,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391519547] [2023-02-18 00:29:59,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391519547] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:29:59,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:29:59,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 00:29:59,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748940242] [2023-02-18 00:29:59,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:29:59,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 00:29:59,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:59,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 00:29:59,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:29:59,436 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 00:29:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:59,447 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-02-18 00:29:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 00:29:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-02-18 00:29:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:59,449 INFO L225 Difference]: With dead ends: 17 [2023-02-18 00:29:59,449 INFO L226 Difference]: Without dead ends: 10 [2023-02-18 00:29:59,449 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 00:29:59,450 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:59,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:29:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-18 00:29:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-18 00:29:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-02-18 00:29:59,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2023-02-18 00:29:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:59,454 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-02-18 00:29:59,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 00:29:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-02-18 00:29:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 00:29:59,455 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:59,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:59,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 00:29:59,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash 438944246, now seen corresponding path program 1 times [2023-02-18 00:29:59,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:59,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277004608] [2023-02-18 00:29:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:59,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:59,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:59,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277004608] [2023-02-18 00:29:59,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277004608] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:29:59,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533541459] [2023-02-18 00:29:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:59,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:29:59,533 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 00:29:59,534 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 00:29:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:59,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 00:29:59,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:29:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:59,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:29:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:59,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533541459] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:29:59,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:29:59,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-18 00:29:59,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762593095] [2023-02-18 00:29:59,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:29:59,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 00:29:59,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:59,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 00:29:59,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:29:59,627 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 00:29:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:59,710 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-02-18 00:29:59,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 00:29:59,712 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 9 [2023-02-18 00:29:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:59,712 INFO L225 Difference]: With dead ends: 38 [2023-02-18 00:29:59,715 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 00:29:59,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:29:59,716 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:59,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:29:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 00:29:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 15. [2023-02-18 00:29:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-02-18 00:29:59,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2023-02-18 00:29:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:59,724 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-02-18 00:29:59,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 00:29:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-02-18 00:29:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 00:29:59,726 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:59,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:59,744 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 00:29:59,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:59,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:59,933 INFO L85 PathProgramCache]: Analyzing trace with hash 724035122, now seen corresponding path program 1 times [2023-02-18 00:29:59,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:59,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968424823] [2023-02-18 00:29:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:00,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:00,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968424823] [2023-02-18 00:30:00,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968424823] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:00,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606614912] [2023-02-18 00:30:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:00,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:00,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:00,033 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 00:30:00,035 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 00:30:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:00,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:30:00,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:00,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:00,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606614912] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:00,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:00,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2023-02-18 00:30:00,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638366061] [2023-02-18 00:30:00,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:00,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 00:30:00,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:00,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 00:30:00,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:30:00,104 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:00,138 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-02-18 00:30:00,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 00:30:00,138 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 00:30:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:00,141 INFO L225 Difference]: With dead ends: 22 [2023-02-18 00:30:00,141 INFO L226 Difference]: Without dead ends: 18 [2023-02-18 00:30:00,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-18 00:30:00,143 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:00,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 31 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:30:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-18 00:30:00,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-02-18 00:30:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-02-18 00:30:00,152 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2023-02-18 00:30:00,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:00,153 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-02-18 00:30:00,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-02-18 00:30:00,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 00:30:00,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:00,154 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:00,161 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 00:30:00,359 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,SelfDestructingSolverStorable3 [2023-02-18 00:30:00,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:00,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:00,360 INFO L85 PathProgramCache]: Analyzing trace with hash 971917686, now seen corresponding path program 2 times [2023-02-18 00:30:00,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:00,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569084381] [2023-02-18 00:30:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:00,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:00,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:00,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569084381] [2023-02-18 00:30:00,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569084381] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:00,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853191327] [2023-02-18 00:30:00,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:30:00,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:00,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:00,421 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 00:30:00,423 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 00:30:00,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:30:00,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:00,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 00:30:00,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:00,479 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 00:30:00,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:00,527 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 00:30:00,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853191327] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:00,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:00,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-02-18 00:30:00,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031036655] [2023-02-18 00:30:00,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:00,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 00:30:00,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:00,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 00:30:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-18 00:30:00,530 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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 00:30:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:00,701 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2023-02-18 00:30:00,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 00:30:00,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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 11 [2023-02-18 00:30:00,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:00,702 INFO L225 Difference]: With dead ends: 38 [2023-02-18 00:30:00,702 INFO L226 Difference]: Without dead ends: 30 [2023-02-18 00:30:00,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:30:00,703 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:00,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 75 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:30:00,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-18 00:30:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2023-02-18 00:30:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-18 00:30:00,711 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2023-02-18 00:30:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:00,712 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-18 00:30:00,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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 00:30:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-18 00:30:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 00:30:00,713 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:00,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:00,733 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 00:30:00,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:00,919 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:00,919 INFO L85 PathProgramCache]: Analyzing trace with hash -518125007, now seen corresponding path program 3 times [2023-02-18 00:30:00,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:00,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765439529] [2023-02-18 00:30:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:00,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:01,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:01,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765439529] [2023-02-18 00:30:01,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765439529] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:01,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792901898] [2023-02-18 00:30:01,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:30:01,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:01,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:01,131 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 00:30:01,132 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 00:30:01,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 00:30:01,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:01,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:30:01,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:01,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:01,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792901898] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:01,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:01,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 13 [2023-02-18 00:30:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590043827] [2023-02-18 00:30:01,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:01,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 00:30:01,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 00:30:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:30:01,373 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:01,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:01,439 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-02-18 00:30:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 00:30:01,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 00:30:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:01,442 INFO L225 Difference]: With dead ends: 25 [2023-02-18 00:30:01,442 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 00:30:01,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:30:01,443 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:01,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:30:01,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 00:30:01,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-02-18 00:30:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:01,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-02-18 00:30:01,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-02-18 00:30:01,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:01,454 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-02-18 00:30:01,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:01,455 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-02-18 00:30:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 00:30:01,456 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:01,456 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:01,461 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 00:30:01,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:01,662 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:01,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:01,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1679778514, now seen corresponding path program 4 times [2023-02-18 00:30:01,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:01,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595959693] [2023-02-18 00:30:01,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:01,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:01,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:01,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595959693] [2023-02-18 00:30:01,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595959693] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:01,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723714805] [2023-02-18 00:30:01,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:30:01,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:01,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:01,753 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 00:30:01,777 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 00:30:01,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:30:01,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:01,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 00:30:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:01,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:01,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723714805] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:01,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:01,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-18 00:30:01,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257890316] [2023-02-18 00:30:01,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:01,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 00:30:01,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 00:30:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:30:01,905 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 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 00:30:02,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:02,247 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2023-02-18 00:30:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 00:30:02,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 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 00:30:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:02,248 INFO L225 Difference]: With dead ends: 71 [2023-02-18 00:30:02,248 INFO L226 Difference]: Without dead ends: 67 [2023-02-18 00:30:02,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=930, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 00:30:02,249 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:02,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 92 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:30:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-18 00:30:02,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 24. [2023-02-18 00:30:02,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:02,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-02-18 00:30:02,253 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 12 [2023-02-18 00:30:02,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:02,254 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-02-18 00:30:02,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 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 00:30:02,254 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-02-18 00:30:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 00:30:02,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:02,254 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:02,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 00:30:02,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:02,459 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1119659351, now seen corresponding path program 5 times [2023-02-18 00:30:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:02,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548744985] [2023-02-18 00:30:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:02,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:02,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:02,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548744985] [2023-02-18 00:30:02,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548744985] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:02,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012774735] [2023-02-18 00:30:02,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:30:02,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:02,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:02,523 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 00:30:02,554 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 00:30:02,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 00:30:02,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:02,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 00:30:02,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:02,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:02,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012774735] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:02,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:02,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2023-02-18 00:30:02,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336944859] [2023-02-18 00:30:02,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:02,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 00:30:02,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 00:30:02,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-02-18 00:30:02,667 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:02,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:02,922 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-02-18 00:30:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 00:30:02,922 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 00:30:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:02,922 INFO L225 Difference]: With dead ends: 60 [2023-02-18 00:30:02,922 INFO L226 Difference]: Without dead ends: 51 [2023-02-18 00:30:02,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 00:30:02,923 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 80 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:02,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 109 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:30:02,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-18 00:30:02,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2023-02-18 00:30:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 00:30:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-02-18 00:30:02,928 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 13 [2023-02-18 00:30:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:02,928 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-02-18 00:30:02,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-02-18 00:30:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 00:30:02,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:02,929 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:02,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:03,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:03,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:03,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:03,134 INFO L85 PathProgramCache]: Analyzing trace with hash -587259054, now seen corresponding path program 6 times [2023-02-18 00:30:03,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:03,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419843410] [2023-02-18 00:30:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:03,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419843410] [2023-02-18 00:30:03,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419843410] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981528582] [2023-02-18 00:30:03,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:30:03,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:03,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:03,338 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 00:30:03,339 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 00:30:03,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 00:30:03,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:03,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:30:03,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:03,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:03,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981528582] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:03,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:03,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 18 [2023-02-18 00:30:03,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698098034] [2023-02-18 00:30:03,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:03,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:30:03,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:30:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:30:03,495 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 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 00:30:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:03,558 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2023-02-18 00:30:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 00:30:03,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 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 14 [2023-02-18 00:30:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:03,559 INFO L225 Difference]: With dead ends: 37 [2023-02-18 00:30:03,560 INFO L226 Difference]: Without dead ends: 33 [2023-02-18 00:30:03,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-02-18 00:30:03,560 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:03,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:30:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-18 00:30:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-02-18 00:30:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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 00:30:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-02-18 00:30:03,565 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2023-02-18 00:30:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:03,565 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-02-18 00:30:03,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 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 00:30:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-02-18 00:30:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 00:30:03,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:03,566 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:03,573 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 00:30:03,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:03,766 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:03,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1023496106, now seen corresponding path program 7 times [2023-02-18 00:30:03,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:03,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514969457] [2023-02-18 00:30:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:03,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:03,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:03,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514969457] [2023-02-18 00:30:03,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514969457] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:03,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733371585] [2023-02-18 00:30:03,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:30:03,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:03,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:03,852 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 00:30:03,854 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 00:30:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:03,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 00:30:03,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:03,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:04,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733371585] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:04,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:04,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2023-02-18 00:30:04,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947430838] [2023-02-18 00:30:04,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:04,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 00:30:04,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 00:30:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-02-18 00:30:04,022 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:04,771 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2023-02-18 00:30:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 00:30:04,772 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 00:30:04,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:04,772 INFO L225 Difference]: With dead ends: 70 [2023-02-18 00:30:04,772 INFO L226 Difference]: Without dead ends: 60 [2023-02-18 00:30:04,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=399, Invalid=2151, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 00:30:04,773 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 141 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:04,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 191 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-18 00:30:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2023-02-18 00:30:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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 00:30:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-18 00:30:04,783 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 15 [2023-02-18 00:30:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:04,783 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-18 00:30:04,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:04,783 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-18 00:30:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 00:30:04,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:04,784 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:04,790 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 00:30:04,989 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,SelfDestructingSolverStorable9 [2023-02-18 00:30:04,989 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:04,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1246234646, now seen corresponding path program 2 times [2023-02-18 00:30:04,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:04,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280502795] [2023-02-18 00:30:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:04,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:05,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:05,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280502795] [2023-02-18 00:30:05,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280502795] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:05,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851547845] [2023-02-18 00:30:05,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:30:05,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:05,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:05,101 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 00:30:05,127 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 00:30:05,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:30:05,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:05,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 00:30:05,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:05,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:05,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851547845] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:05,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:05,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-02-18 00:30:05,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815112511] [2023-02-18 00:30:05,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:05,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 00:30:05,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:05,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 00:30:05,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:30:05,320 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:06,497 INFO L93 Difference]: Finished difference Result 128 states and 152 transitions. [2023-02-18 00:30:06,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 00:30:06,498 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 00:30:06,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:06,498 INFO L225 Difference]: With dead ends: 128 [2023-02-18 00:30:06,498 INFO L226 Difference]: Without dead ends: 124 [2023-02-18 00:30:06,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=478, Invalid=1162, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:30:06,499 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 430 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:06,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 229 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-18 00:30:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 42. [2023-02-18 00:30:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 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 00:30:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2023-02-18 00:30:06,511 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 15 [2023-02-18 00:30:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:06,511 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2023-02-18 00:30:06,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2023-02-18 00:30:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 00:30:06,513 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:06,513 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:06,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:06,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:06,718 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash -694576239, now seen corresponding path program 8 times [2023-02-18 00:30:06,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:06,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890692987] [2023-02-18 00:30:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:06,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:07,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:07,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890692987] [2023-02-18 00:30:07,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890692987] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:07,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663469152] [2023-02-18 00:30:07,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:30:07,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:07,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:07,006 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 00:30:07,040 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 00:30:07,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:30:07,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:07,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:30:07,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:07,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:07,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663469152] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:07,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:07,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 21 [2023-02-18 00:30:07,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349223643] [2023-02-18 00:30:07,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:07,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 00:30:07,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 00:30:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:30:07,398 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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 00:30:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:07,526 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2023-02-18 00:30:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 00:30:07,527 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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 16 [2023-02-18 00:30:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:07,527 INFO L225 Difference]: With dead ends: 51 [2023-02-18 00:30:07,527 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 00:30:07,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:30:07,528 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:07,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:30:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 00:30:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-02-18 00:30:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.425) internal successors, (57), 40 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 00:30:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2023-02-18 00:30:07,538 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 16 [2023-02-18 00:30:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:07,539 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2023-02-18 00:30:07,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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 00:30:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2023-02-18 00:30:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 00:30:07,542 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:07,542 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:07,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:07,746 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,SelfDestructingSolverStorable11 [2023-02-18 00:30:07,746 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:07,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2077297521, now seen corresponding path program 9 times [2023-02-18 00:30:07,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:07,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177912325] [2023-02-18 00:30:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:07,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:07,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177912325] [2023-02-18 00:30:07,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177912325] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762072666] [2023-02-18 00:30:07,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:30:07,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:07,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:07,829 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 00:30:07,831 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 00:30:07,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 00:30:07,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:07,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 00:30:07,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:07,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:08,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762072666] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:08,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:08,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-18 00:30:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325031753] [2023-02-18 00:30:08,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:08,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 00:30:08,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:08,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 00:30:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-02-18 00:30:08,030 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:10,685 INFO L93 Difference]: Finished difference Result 130 states and 158 transitions. [2023-02-18 00:30:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-18 00:30:10,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 00:30:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:10,686 INFO L225 Difference]: With dead ends: 130 [2023-02-18 00:30:10,686 INFO L226 Difference]: Without dead ends: 126 [2023-02-18 00:30:10,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1417, Invalid=4133, Unknown=0, NotChecked=0, Total=5550 [2023-02-18 00:30:10,688 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 482 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:10,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 174 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:30:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-18 00:30:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 41. [2023-02-18 00:30:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 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 00:30:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2023-02-18 00:30:10,713 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 16 [2023-02-18 00:30:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:10,713 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2023-02-18 00:30:10,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2023-02-18 00:30:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 00:30:10,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:10,714 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:10,737 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 00:30:10,933 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,SelfDestructingSolverStorable12 [2023-02-18 00:30:10,933 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:10,934 INFO L85 PathProgramCache]: Analyzing trace with hash -55361545, now seen corresponding path program 10 times [2023-02-18 00:30:10,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:10,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476417947] [2023-02-18 00:30:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:10,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:11,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476417947] [2023-02-18 00:30:11,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476417947] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854236194] [2023-02-18 00:30:11,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:30:11,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:11,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:11,031 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 00:30:11,032 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 00:30:11,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:30:11,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:11,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 00:30:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:11,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:11,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854236194] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:11,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:11,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 24 [2023-02-18 00:30:11,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542416091] [2023-02-18 00:30:11,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:11,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 00:30:11,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:11,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 00:30:11,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2023-02-18 00:30:11,272 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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 00:30:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:13,145 INFO L93 Difference]: Finished difference Result 103 states and 125 transitions. [2023-02-18 00:30:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-18 00:30:13,146 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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 17 [2023-02-18 00:30:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:13,146 INFO L225 Difference]: With dead ends: 103 [2023-02-18 00:30:13,146 INFO L226 Difference]: Without dead ends: 92 [2023-02-18 00:30:13,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=685, Invalid=3871, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 00:30:13,147 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 245 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:13,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 151 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:30:13,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-18 00:30:13,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 48. [2023-02-18 00:30:13,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 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 00:30:13,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2023-02-18 00:30:13,161 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 17 [2023-02-18 00:30:13,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:13,162 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2023-02-18 00:30:13,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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 00:30:13,162 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2023-02-18 00:30:13,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 00:30:13,162 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:13,162 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:13,172 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 00:30:13,367 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,SelfDestructingSolverStorable13 [2023-02-18 00:30:13,367 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1790949262, now seen corresponding path program 11 times [2023-02-18 00:30:13,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:13,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026852584] [2023-02-18 00:30:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:13,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:13,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:13,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026852584] [2023-02-18 00:30:13,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026852584] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:13,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145321450] [2023-02-18 00:30:13,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:30:13,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:13,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:13,667 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 00:30:13,670 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 00:30:13,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 00:30:13,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:13,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-18 00:30:13,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:14,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:14,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145321450] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:14,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:14,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-02-18 00:30:14,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861242076] [2023-02-18 00:30:14,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:14,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 00:30:14,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:14,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 00:30:14,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-02-18 00:30:14,790 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 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 00:30:16,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:16,650 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2023-02-18 00:30:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 00:30:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 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 18 [2023-02-18 00:30:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:16,651 INFO L225 Difference]: With dead ends: 93 [2023-02-18 00:30:16,652 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 00:30:16,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 00:30:16,652 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:16,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 96 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 00:30:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 00:30:16,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 47. [2023-02-18 00:30:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 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 00:30:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2023-02-18 00:30:16,683 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 18 [2023-02-18 00:30:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:16,683 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2023-02-18 00:30:16,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 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 00:30:16,684 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2023-02-18 00:30:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 00:30:16,684 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:16,684 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:16,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:16,885 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,SelfDestructingSolverStorable14 [2023-02-18 00:30:16,886 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:16,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:16,886 INFO L85 PathProgramCache]: Analyzing trace with hash 316813110, now seen corresponding path program 12 times [2023-02-18 00:30:16,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:16,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280875786] [2023-02-18 00:30:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:16,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:17,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280875786] [2023-02-18 00:30:17,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280875786] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:17,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280245507] [2023-02-18 00:30:17,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:30:17,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:17,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:17,026 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 00:30:17,074 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 00:30:17,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 00:30:17,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:17,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 00:30:17,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:17,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:17,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280245507] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:17,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:17,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 28 [2023-02-18 00:30:17,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526133805] [2023-02-18 00:30:17,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:17,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 00:30:17,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:17,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 00:30:17,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2023-02-18 00:30:17,366 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 00:30:22,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:22,516 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2023-02-18 00:30:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-18 00:30:22,517 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 19 [2023-02-18 00:30:22,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:22,517 INFO L225 Difference]: With dead ends: 122 [2023-02-18 00:30:22,517 INFO L226 Difference]: Without dead ends: 110 [2023-02-18 00:30:22,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 14 SyntacticMatches, 10 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1099, Invalid=6383, Unknown=0, NotChecked=0, Total=7482 [2023-02-18 00:30:22,519 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 378 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:22,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 182 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 00:30:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-18 00:30:22,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 56. [2023-02-18 00:30:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 states have internal predecessors, (73), 0 states have call successors, (0), 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 00:30:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2023-02-18 00:30:22,555 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 19 [2023-02-18 00:30:22,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:22,555 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2023-02-18 00:30:22,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 00:30:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2023-02-18 00:30:22,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 00:30:22,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:22,556 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:22,563 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 00:30:22,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:22,760 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:22,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:22,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1135672079, now seen corresponding path program 13 times [2023-02-18 00:30:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:22,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120132066] [2023-02-18 00:30:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:23,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:23,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120132066] [2023-02-18 00:30:23,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120132066] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:23,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057612530] [2023-02-18 00:30:23,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:30:23,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:23,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:23,044 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 00:30:23,046 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 00:30:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:23,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:30:23,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:23,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:23,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057612530] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:23,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:23,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 30 [2023-02-18 00:30:23,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430256282] [2023-02-18 00:30:23,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:23,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 00:30:23,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:23,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 00:30:23,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2023-02-18 00:30:23,437 INFO L87 Difference]: Start difference. First operand 56 states and 73 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 00:30:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:23,659 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2023-02-18 00:30:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 00:30:23,659 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 20 [2023-02-18 00:30:23,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:23,659 INFO L225 Difference]: With dead ends: 67 [2023-02-18 00:30:23,660 INFO L226 Difference]: Without dead ends: 63 [2023-02-18 00:30:23,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:30:23,666 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:23,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:23,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-18 00:30:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2023-02-18 00:30:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 54 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 00:30:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2023-02-18 00:30:23,704 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 20 [2023-02-18 00:30:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:23,706 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2023-02-18 00:30:23,706 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 00:30:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2023-02-18 00:30:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 00:30:23,707 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:23,707 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:23,712 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 00:30:23,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 00:30:23,909 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:23,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1183338190, now seen corresponding path program 14 times [2023-02-18 00:30:23,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:23,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897688249] [2023-02-18 00:30:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:23,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:24,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:24,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897688249] [2023-02-18 00:30:24,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897688249] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:24,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419532664] [2023-02-18 00:30:24,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:30:24,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:24,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:24,057 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 00:30:24,077 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 00:30:24,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:30:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:24,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 00:30:24,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:24,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:24,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419532664] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:24,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:24,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-02-18 00:30:24,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340362799] [2023-02-18 00:30:24,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:24,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 00:30:24,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:24,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 00:30:24,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:30:24,471 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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 00:30:43,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:43,056 INFO L93 Difference]: Finished difference Result 192 states and 238 transitions. [2023-02-18 00:30:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-02-18 00:30:43,056 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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 20 [2023-02-18 00:30:43,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:43,057 INFO L225 Difference]: With dead ends: 192 [2023-02-18 00:30:43,057 INFO L226 Difference]: Without dead ends: 188 [2023-02-18 00:30:43,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 14 SyntacticMatches, 11 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4510 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=3555, Invalid=10725, Unknown=0, NotChecked=0, Total=14280 [2023-02-18 00:30:43,060 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 902 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:43,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 332 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:30:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-02-18 00:30:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 59. [2023-02-18 00:30:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 58 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2023-02-18 00:30:43,093 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 20 [2023-02-18 00:30:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:43,093 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2023-02-18 00:30:43,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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 00:30:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2023-02-18 00:30:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 00:30:43,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:43,095 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:43,106 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 00:30:43,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 00:30:43,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:43,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:43,301 INFO L85 PathProgramCache]: Analyzing trace with hash -844430697, now seen corresponding path program 15 times [2023-02-18 00:30:43,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:43,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165783737] [2023-02-18 00:30:43,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:43,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:43,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:43,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165783737] [2023-02-18 00:30:43,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165783737] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:43,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694865772] [2023-02-18 00:30:43,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:30:43,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:43,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:43,439 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 00:30:43,441 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 00:30:43,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 00:30:43,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:43,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 00:30:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:43,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:43,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694865772] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:43,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:43,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 32 [2023-02-18 00:30:43,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931814684] [2023-02-18 00:30:43,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:43,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 00:30:43,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:43,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 00:30:43,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2023-02-18 00:30:43,797 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 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 00:30:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:58,283 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2023-02-18 00:30:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-18 00:30:58,283 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 00:30:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:58,284 INFO L225 Difference]: With dead ends: 153 [2023-02-18 00:30:58,284 INFO L226 Difference]: Without dead ends: 140 [2023-02-18 00:30:58,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 14 SyntacticMatches, 12 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2898 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1674, Invalid=9882, Unknown=0, NotChecked=0, Total=11556 [2023-02-18 00:30:58,287 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 510 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:58,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 213 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-18 00:30:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-18 00:30:58,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 64. [2023-02-18 00:30:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2023-02-18 00:30:58,357 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 21 [2023-02-18 00:30:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:58,357 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2023-02-18 00:30:58,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 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 00:30:58,358 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2023-02-18 00:30:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 00:30:58,358 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:58,358 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:58,365 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 00:30:58,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:58,566 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:58,566 INFO L85 PathProgramCache]: Analyzing trace with hash -818326126, now seen corresponding path program 16 times [2023-02-18 00:30:58,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:58,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769469306] [2023-02-18 00:30:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:58,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:58,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:58,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769469306] [2023-02-18 00:30:58,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769469306] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:58,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987490409] [2023-02-18 00:30:58,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:30:58,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:58,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:58,915 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 00:30:58,918 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 00:30:58,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:30:58,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:58,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:30:58,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:59,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:59,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987490409] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:59,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:59,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 34 [2023-02-18 00:30:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870058750] [2023-02-18 00:30:59,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:59,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 00:30:59,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:59,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 00:30:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 00:30:59,425 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 34 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 00:30:59,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:59,705 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2023-02-18 00:30:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 00:30:59,705 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 34 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 22 [2023-02-18 00:30:59,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:59,706 INFO L225 Difference]: With dead ends: 76 [2023-02-18 00:30:59,706 INFO L226 Difference]: Without dead ends: 72 [2023-02-18 00:30:59,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 00:30:59,711 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:59,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:59,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-18 00:30:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2023-02-18 00:30:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 62 states have internal predecessors, (83), 0 states have call successors, (0), 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 00:30:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2023-02-18 00:30:59,768 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 22 [2023-02-18 00:30:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:59,768 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2023-02-18 00:30:59,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 34 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 00:30:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2023-02-18 00:30:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 00:30:59,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:59,769 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:59,776 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 00:30:59,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:59,976 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:59,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:59,977 INFO L85 PathProgramCache]: Analyzing trace with hash 403359254, now seen corresponding path program 17 times [2023-02-18 00:30:59,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:59,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475858549] [2023-02-18 00:30:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:59,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:00,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:00,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475858549] [2023-02-18 00:31:00,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475858549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:00,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044478483] [2023-02-18 00:31:00,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:31:00,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:00,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:00,144 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 00:31:00,186 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 00:31:00,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 00:31:00,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:00,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 00:31:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:00,424 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 00:31:00,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:00,880 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 00:31:00,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044478483] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:00,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:00,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 36 [2023-02-18 00:31:00,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252446330] [2023-02-18 00:31:00,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:00,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 00:31:00,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:00,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 00:31:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 00:31:00,881 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 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 00:31:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:40,937 INFO L93 Difference]: Finished difference Result 176 states and 217 transitions. [2023-02-18 00:31:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-02-18 00:31:40,937 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 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 00:31:40,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:40,937 INFO L225 Difference]: With dead ends: 176 [2023-02-18 00:31:40,937 INFO L226 Difference]: Without dead ends: 162 [2023-02-18 00:31:40,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 14 SyntacticMatches, 14 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4545 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=2447, Invalid=14583, Unknown=0, NotChecked=0, Total=17030 [2023-02-18 00:31:40,939 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 697 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:40,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 205 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-02-18 00:31:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-18 00:31:40,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 74. [2023-02-18 00:31:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 0 states have call successors, (0), 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 00:31:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2023-02-18 00:31:41,000 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 23 [2023-02-18 00:31:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:41,000 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2023-02-18 00:31:41,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 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 00:31:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2023-02-18 00:31:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 00:31:41,001 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:41,001 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:41,008 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 00:31:41,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:41,206 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:41,206 INFO L85 PathProgramCache]: Analyzing trace with hash -279951791, now seen corresponding path program 18 times [2023-02-18 00:31:41,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:41,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480385595] [2023-02-18 00:31:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:41,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:41,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:41,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480385595] [2023-02-18 00:31:41,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480385595] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:41,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934348358] [2023-02-18 00:31:41,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:31:41,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:41,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:41,610 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 00:31:41,611 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 00:31:41,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 00:31:41,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:41,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:31:41,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:41,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:42,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934348358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:42,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:42,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 37 [2023-02-18 00:31:42,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509218636] [2023-02-18 00:31:42,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:42,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 00:31:42,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:42,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 00:31:42,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 00:31:42,838 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 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 00:31:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:43,234 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2023-02-18 00:31:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 00:31:43,234 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 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 24 [2023-02-18 00:31:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:43,235 INFO L225 Difference]: With dead ends: 87 [2023-02-18 00:31:43,235 INFO L226 Difference]: Without dead ends: 83 [2023-02-18 00:31:43,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 19 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 00:31:43,236 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:43,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 96 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:31:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-18 00:31:43,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2023-02-18 00:31:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 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 00:31:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2023-02-18 00:31:43,309 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 24 [2023-02-18 00:31:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:43,309 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2023-02-18 00:31:43,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 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 00:31:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2023-02-18 00:31:43,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 00:31:43,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:43,310 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:43,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:43,514 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,SelfDestructingSolverStorable21 [2023-02-18 00:31:43,515 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:43,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2124922385, now seen corresponding path program 19 times [2023-02-18 00:31:43,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:43,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684685144] [2023-02-18 00:31:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:43,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:43,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:43,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684685144] [2023-02-18 00:31:43,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684685144] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:43,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763080266] [2023-02-18 00:31:43,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:31:43,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:43,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:43,753 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 00:31:43,755 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 00:31:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:43,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 00:31:43,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:43,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:44,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763080266] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:44,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:44,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2023-02-18 00:31:44,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485373404] [2023-02-18 00:31:44,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:44,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 00:31:44,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 00:31:44,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1208, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 00:31:44,330 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 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 00:32:54,760 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0) (> (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296) 0)) is different from false [2023-02-18 00:33:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:22,454 INFO L93 Difference]: Finished difference Result 270 states and 339 transitions. [2023-02-18 00:33:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-02-18 00:33:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 00:33:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:22,455 INFO L225 Difference]: With dead ends: 270 [2023-02-18 00:33:22,455 INFO L226 Difference]: Without dead ends: 266 [2023-02-18 00:33:22,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 14 SyntacticMatches, 15 SemanticMatches, 172 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10202 ImplicationChecksByTransitivity, 97.1s TimeCoverageRelationStatistics Valid=7328, Invalid=22428, Unknown=4, NotChecked=342, Total=30102 [2023-02-18 00:33:22,458 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1359 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:22,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1359 Valid, 538 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 691 Invalid, 0 Unknown, 1 Unchecked, 1.4s Time] [2023-02-18 00:33:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-02-18 00:33:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 80. [2023-02-18 00:33:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 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 00:33:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 109 transitions. [2023-02-18 00:33:22,521 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 109 transitions. Word has length 24 [2023-02-18 00:33:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:22,521 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 109 transitions. [2023-02-18 00:33:22,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 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 00:33:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2023-02-18 00:33:22,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 00:33:22,522 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:22,522 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:22,547 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 00:33:22,726 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,SelfDestructingSolverStorable22 [2023-02-18 00:33:22,726 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:22,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:22,727 INFO L85 PathProgramCache]: Analyzing trace with hash -86905545, now seen corresponding path program 20 times [2023-02-18 00:33:22,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:22,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804423502] [2023-02-18 00:33:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:22,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:22,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:22,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804423502] [2023-02-18 00:33:22,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804423502] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:22,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335266748] [2023-02-18 00:33:22,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:33:22,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:22,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:22,949 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 00:33:22,950 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 00:33:23,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:33:23,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:23,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 00:33:23,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:23,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:23,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335266748] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:23,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:23,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 38 [2023-02-18 00:33:23,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072248793] [2023-02-18 00:33:23,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:23,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 00:33:23,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 00:33:23,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 00:33:23,411 INFO L87 Difference]: Start difference. First operand 80 states and 109 transitions. Second operand has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 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 00:33:23,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:23,752 INFO L93 Difference]: Finished difference Result 95 states and 124 transitions. [2023-02-18 00:33:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 00:33:23,753 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 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 25 [2023-02-18 00:33:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:23,753 INFO L225 Difference]: With dead ends: 95 [2023-02-18 00:33:23,753 INFO L226 Difference]: Without dead ends: 80 [2023-02-18 00:33:23,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=2017, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 00:33:23,755 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:23,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 158 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:33:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-18 00:33:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-02-18 00:33:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.3670886075949367) internal successors, (108), 79 states have internal predecessors, (108), 0 states have call successors, (0), 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 00:33:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 108 transitions. [2023-02-18 00:33:23,813 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 108 transitions. Word has length 25 [2023-02-18 00:33:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:23,813 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 108 transitions. [2023-02-18 00:33:23,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 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 00:33:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 108 transitions. [2023-02-18 00:33:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 00:33:23,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:23,814 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:23,819 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 00:33:24,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:24,016 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:24,016 INFO L85 PathProgramCache]: Analyzing trace with hash 381176498, now seen corresponding path program 21 times [2023-02-18 00:33:24,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:24,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188589393] [2023-02-18 00:33:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:24,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:24,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188589393] [2023-02-18 00:33:24,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188589393] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671363337] [2023-02-18 00:33:24,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:33:24,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:24,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:24,517 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 00:33:24,519 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 00:33:24,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 00:33:24,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:24,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 00:33:24,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:25,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:27,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671363337] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:27,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:27,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 50 [2023-02-18 00:33:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583564581] [2023-02-18 00:33:27,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:27,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 00:33:27,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 00:33:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2178, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 00:33:27,379 INFO L87 Difference]: Start difference. First operand 80 states and 108 transitions. Second operand has 50 states, 50 states have (on average 1.18) internal successors, (59), 50 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 00:33:35,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:35,011 INFO L93 Difference]: Finished difference Result 165 states and 199 transitions. [2023-02-18 00:33:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 00:33:35,012 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.18) internal successors, (59), 50 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 26 [2023-02-18 00:33:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:35,012 INFO L225 Difference]: With dead ends: 165 [2023-02-18 00:33:35,013 INFO L226 Difference]: Without dead ends: 161 [2023-02-18 00:33:35,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 11 SyntacticMatches, 14 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=497, Invalid=3043, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 00:33:35,013 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 145 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:35,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 219 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-02-18 00:33:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-02-18 00:33:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 80. [2023-02-18 00:33:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.3670886075949367) internal successors, (108), 79 states have internal predecessors, (108), 0 states have call successors, (0), 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 00:33:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 108 transitions. [2023-02-18 00:33:35,084 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 108 transitions. Word has length 26 [2023-02-18 00:33:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:35,084 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 108 transitions. [2023-02-18 00:33:35,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.18) internal successors, (59), 50 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 00:33:35,085 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 108 transitions. [2023-02-18 00:33:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 00:33:35,085 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:35,085 INFO L195 NwaCegarLoop]: trace histogram [13, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:35,095 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 00:33:35,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:35,290 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:35,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:35,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1917831922, now seen corresponding path program 22 times [2023-02-18 00:33:35,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:35,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046177039] [2023-02-18 00:33:35,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:35,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:35,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:35,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046177039] [2023-02-18 00:33:35,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046177039] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:35,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293412775] [2023-02-18 00:33:35,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:33:35,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:35,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:35,507 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 00:33:35,508 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 00:33:35,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:33:35,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:35,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-18 00:33:35,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:35,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:36,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293412775] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:36,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:36,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2023-02-18 00:33:36,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452253459] [2023-02-18 00:33:36,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:36,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 00:33:36,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:36,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 00:33:36,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 00:33:36,145 INFO L87 Difference]: Start difference. First operand 80 states and 108 transitions. Second operand has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:49,231 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967291) 4294967296) 0) (> (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296) 0) (> (mod (+ 4294967291 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) is different from false [2023-02-18 00:36:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:32,121 INFO L93 Difference]: Finished difference Result 292 states and 354 transitions. [2023-02-18 00:36:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2023-02-18 00:36:32,121 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 00:36:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:32,122 INFO L225 Difference]: With dead ends: 292 [2023-02-18 00:36:32,122 INFO L226 Difference]: Without dead ends: 288 [2023-02-18 00:36:32,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 14 SyntacticMatches, 17 SemanticMatches, 205 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14819 ImplicationChecksByTransitivity, 174.7s TimeCoverageRelationStatistics Valid=10246, Invalid=31986, Unknown=2, NotChecked=408, Total=42642 [2023-02-18 00:36:32,125 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1741 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:32,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1741 Valid, 610 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 893 Invalid, 0 Unknown, 1 Unchecked, 1.6s Time] [2023-02-18 00:36:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-02-18 00:36:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 88. [2023-02-18 00:36:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.4137931034482758) internal successors, (123), 87 states have internal predecessors, (123), 0 states have call successors, (0), 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 00:36:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2023-02-18 00:36:32,201 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 26 [2023-02-18 00:36:32,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:32,202 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2023-02-18 00:36:32,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2023-02-18 00:36:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 00:36:32,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:32,203 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:32,207 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 00:36:32,407 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,SelfDestructingSolverStorable25 [2023-02-18 00:36:32,408 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:32,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1066765066, now seen corresponding path program 23 times [2023-02-18 00:36:32,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:32,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373353725] [2023-02-18 00:36:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:32,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:32,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:32,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373353725] [2023-02-18 00:36:32,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373353725] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:32,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821299835] [2023-02-18 00:36:32,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:36:32,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:32,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:32,624 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 00:36:32,626 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 00:36:32,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-18 00:36:32,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:32,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 00:36:32,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:33,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:33,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821299835] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:33,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:33,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 44 [2023-02-18 00:36:33,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875990768] [2023-02-18 00:36:33,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:33,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 00:36:33,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:33,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 00:36:33,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 00:36:33,607 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 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 00:36:45,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 00:36:50,110 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0)) (.cse2 (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296) 0)) (.cse1 (> (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (.cse7 (> (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0)) (.cse4 (> (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (.cse5 (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296) 0)) (.cse3 (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296) 0)) (.cse6 (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0))) (and (or (not .cse0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967290) 4294967296) 0)) (or (not (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0)) .cse0) .cse1 (or (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967288) 4294967296) 0) (not .cse2)) (or (not (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0)) .cse2) (or (not (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0)) .cse3) .cse4 (or (not .cse1) (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967289) 4294967296) 0)) (or (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967287) 4294967296) 0) (not .cse5)) (or (not .cse6) (> (mod (+ 4294967288 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse7 (or (not .cse7) (> (mod (+ 4294967291 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (or (> (mod (+ 4294967290 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (not .cse4)) (or (not (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0)) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967291) 4294967296) 0)) (or .cse5 (not (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0))) (or (not .cse3) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967289) 4294967296) 0)) .cse6 (> (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) is different from false [2023-02-18 00:37:37,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 00:39:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:39:33,280 INFO L93 Difference]: Finished difference Result 245 states and 309 transitions. [2023-02-18 00:39:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-02-18 00:39:33,280 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 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 27 [2023-02-18 00:39:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:39:33,281 INFO L225 Difference]: With dead ends: 245 [2023-02-18 00:39:33,281 INFO L226 Difference]: Without dead ends: 229 [2023-02-18 00:39:33,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 14 SyntacticMatches, 18 SemanticMatches, 179 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9361 ImplicationChecksByTransitivity, 160.5s TimeCoverageRelationStatistics Valid=4810, Invalid=27413, Unknown=1, NotChecked=356, Total=32580 [2023-02-18 00:39:33,282 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 870 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:39:33,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 227 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 479 Invalid, 1 Unknown, 1 Unchecked, 19.5s Time] [2023-02-18 00:39:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-02-18 00:39:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 101. [2023-02-18 00:39:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.35) internal successors, (135), 100 states have internal predecessors, (135), 0 states have call successors, (0), 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 00:39:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2023-02-18 00:39:33,474 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 27 [2023-02-18 00:39:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:39:33,474 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2023-02-18 00:39:33,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 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 00:39:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2023-02-18 00:39:33,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 00:39:33,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:39:33,475 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:39:33,482 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 00:39:33,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 00:39:33,683 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:39:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:39:33,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2083479473, now seen corresponding path program 24 times [2023-02-18 00:39:33,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:39:33,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381446081] [2023-02-18 00:39:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:39:33,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:39:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:39:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:39:34,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:39:34,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381446081] [2023-02-18 00:39:34,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381446081] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:39:34,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128102563] [2023-02-18 00:39:34,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:39:34,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:39:34,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:39:34,280 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 00:39:34,284 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 00:39:34,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-18 00:39:34,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:39:34,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-18 00:39:34,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:39:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:39:35,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:39:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:39:37,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128102563] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:39:37,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:39:37,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 57 [2023-02-18 00:39:37,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243573016] [2023-02-18 00:39:37,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:39:37,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-18 00:39:37,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:39:37,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-18 00:39:37,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2868, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 00:39:37,234 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 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 00:39:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:39:56,844 INFO L93 Difference]: Finished difference Result 197 states and 241 transitions. [2023-02-18 00:39:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 00:39:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 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 00:39:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:39:56,846 INFO L225 Difference]: With dead ends: 197 [2023-02-18 00:39:56,846 INFO L226 Difference]: Without dead ends: 193 [2023-02-18 00:39:56,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 11 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=592, Invalid=3964, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 00:39:56,848 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 205 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:39:56,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 197 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-02-18 00:39:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-18 00:39:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 100. [2023-02-18 00:39:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3535353535353536) internal successors, (134), 99 states have internal predecessors, (134), 0 states have call successors, (0), 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 00:39:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 134 transitions. [2023-02-18 00:39:57,094 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 134 transitions. Word has length 28 [2023-02-18 00:39:57,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:39:57,094 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 134 transitions. [2023-02-18 00:39:57,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 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 00:39:57,095 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 134 transitions. [2023-02-18 00:39:57,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 00:39:57,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:39:57,095 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:39:57,100 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 00:39:57,301 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,SelfDestructingSolverStorable27 [2023-02-18 00:39:57,301 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:39:57,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:39:57,301 INFO L85 PathProgramCache]: Analyzing trace with hash 165019607, now seen corresponding path program 25 times [2023-02-18 00:39:57,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:39:57,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497997306] [2023-02-18 00:39:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:39:57,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:39:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:39:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:39:57,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:39:57,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497997306] [2023-02-18 00:39:57,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497997306] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:39:57,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388764136] [2023-02-18 00:39:57,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:39:57,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:39:57,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:39:57,582 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 00:39:57,583 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 00:39:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:39:57,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-18 00:39:57,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:39:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:39:57,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:39:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:39:58,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388764136] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:39:58,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:39:58,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 46 [2023-02-18 00:39:58,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896327528] [2023-02-18 00:39:58,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:39:58,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 00:39:58,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:39:58,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 00:39:58,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 00:39:58,367 INFO L87 Difference]: Start difference. First operand 100 states and 134 transitions. Second operand has 46 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 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 00:39:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:39:59,093 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2023-02-18 00:39:59,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 00:39:59,093 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 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 29 [2023-02-18 00:39:59,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:39:59,094 INFO L225 Difference]: With dead ends: 117 [2023-02-18 00:39:59,094 INFO L226 Difference]: Without dead ends: 100 [2023-02-18 00:39:59,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 19 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=3015, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 00:39:59,095 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:39:59,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 167 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:39:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-18 00:39:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-18 00:39:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 99 states have internal predecessors, (133), 0 states have call successors, (0), 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 00:39:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 133 transitions. [2023-02-18 00:39:59,295 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 133 transitions. Word has length 29 [2023-02-18 00:39:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:39:59,295 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 133 transitions. [2023-02-18 00:39:59,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 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 00:39:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 133 transitions. [2023-02-18 00:39:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 00:39:59,296 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:39:59,296 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:39:59,301 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 00:39:59,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 00:39:59,499 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:39:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:39:59,499 INFO L85 PathProgramCache]: Analyzing trace with hash -401922094, now seen corresponding path program 26 times [2023-02-18 00:39:59,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:39:59,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193136565] [2023-02-18 00:39:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:39:59,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:39:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:40:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:40:00,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:40:00,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193136565] [2023-02-18 00:40:00,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193136565] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:40:00,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443216035] [2023-02-18 00:40:00,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:40:00,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:00,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:40:00,111 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 00:40:00,113 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 00:40:00,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:40:00,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:40:00,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 00:40:00,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:40:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:40:00,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:40:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:40:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443216035] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:40:01,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:40:01,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15, 15] total 50 [2023-02-18 00:40:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806411725] [2023-02-18 00:40:01,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:40:01,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 00:40:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:40:01,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 00:40:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2286, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 00:40:01,190 INFO L87 Difference]: Start difference. First operand 100 states and 133 transitions. Second operand has 50 states, 50 states have (on average 1.68) internal successors, (84), 50 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:01,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:40:01,976 INFO L93 Difference]: Finished difference Result 117 states and 150 transitions. [2023-02-18 00:40:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 00:40:01,977 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.68) internal successors, (84), 50 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 00:40:01,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:40:01,977 INFO L225 Difference]: With dead ends: 117 [2023-02-18 00:40:01,977 INFO L226 Difference]: Without dead ends: 113 [2023-02-18 00:40:01,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=2379, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 00:40:01,978 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:40:01,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 126 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 00:40:01,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-18 00:40:02,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2023-02-18 00:40:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 99 states have internal predecessors, (133), 0 states have call successors, (0), 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 00:40:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 133 transitions. [2023-02-18 00:40:02,198 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 133 transitions. Word has length 30 [2023-02-18 00:40:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:40:02,198 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 133 transitions. [2023-02-18 00:40:02,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.68) internal successors, (84), 50 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 133 transitions. [2023-02-18 00:40:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 00:40:02,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:40:02,199 INFO L195 NwaCegarLoop]: trace histogram [16, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:40:02,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 00:40:02,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:02,401 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:40:02,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:40:02,401 INFO L85 PathProgramCache]: Analyzing trace with hash 781548561, now seen corresponding path program 27 times [2023-02-18 00:40:02,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:40:02,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791878481] [2023-02-18 00:40:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:40:02,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:40:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:40:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:40:02,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:40:02,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791878481] [2023-02-18 00:40:02,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791878481] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:40:02,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525671394] [2023-02-18 00:40:02,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:40:02,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:02,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:40:02,689 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 00:40:02,724 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 00:40:03,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-18 00:40:03,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:40:03,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-18 00:40:03,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:40:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:40:04,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:40:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:40:04,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525671394] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:40:04,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:40:04,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-18 00:40:04,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244428522] [2023-02-18 00:40:04,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:40:04,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-18 00:40:04,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:40:04,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-18 00:40:04,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=2106, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 00:40:04,588 INFO L87 Difference]: Start difference. First operand 100 states and 133 transitions. Second operand has 51 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 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 00:42:40,616 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0) (> (mod (+ 4294967290 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967291) 4294967296) 0) (> (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967290) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296) 0) (> (mod (+ 4294967291 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) is different from false