./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep60-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/reducercommutativity/sep60-2.i -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 b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 09:23:31,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:23:31,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:23:31,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:23:31,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:23:31,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:23:31,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:23:31,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:23:31,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:23:32,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:23:32,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:23:32,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:23:32,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:23:32,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:23:32,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:23:32,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:23:32,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:23:32,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:23:32,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:23:32,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:23:32,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:23:32,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:23:32,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:23:32,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:23:32,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:23:32,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:23:32,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:23:32,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:23:32,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:23:32,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:23:32,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:23:32,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:23:32,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:23:32,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:23:32,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:23:32,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:23:32,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:23:32,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:23:32,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:23:32,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:23:32,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:23:32,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:23:32,051 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:23:32,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:23:32,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:23:32,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:23:32,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:23:32,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:23:32,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:23:32,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:23:32,056 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:23:32,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:23:32,057 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:23:32,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:23:32,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:23:32,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:23:32,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:23:32,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:23:32,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:23:32,058 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:23:32,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:23:32,058 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:23:32,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:23:32,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:23:32,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:23:32,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:23:32,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:23:32,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:23:32,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:23:32,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:23:32,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:23:32,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:23:32,060 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:23:32,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:23:32,060 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:23:32,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:23:32,060 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:23:32,061 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 [2023-02-15 09:23:32,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:23:32,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:23:32,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:23:32,252 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:23:32,252 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:23:32,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep60-2.i [2023-02-15 09:23:33,373 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:23:33,516 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:23:33,516 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep60-2.i [2023-02-15 09:23:33,521 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac64ace3/8bfb0718c85a49df94193ca2cde37887/FLAG8ac435116 [2023-02-15 09:23:33,531 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac64ace3/8bfb0718c85a49df94193ca2cde37887 [2023-02-15 09:23:33,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:23:33,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:23:33,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:23:33,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:23:33,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:23:33,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc97cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33, skipping insertion in model container [2023-02-15 09:23:33,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:23:33,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:23:33,647 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/reducercommutativity/sep60-2.i[1293,1306] [2023-02-15 09:23:33,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:23:33,654 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:23:33,666 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/reducercommutativity/sep60-2.i[1293,1306] [2023-02-15 09:23:33,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:23:33,675 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:23:33,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33 WrapperNode [2023-02-15 09:23:33,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:23:33,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:23:33,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:23:33,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:23:33,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,697 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-15 09:23:33,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:23:33,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:23:33,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:23:33,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:23:33,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,711 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:23:33,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:23:33,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:23:33,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:23:33,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (1/1) ... [2023-02-15 09:23:33,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:23:33,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:33,748 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) [2023-02-15 09:23:33,750 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 [2023-02-15 09:23:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:23:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:23:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 09:23:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:23:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:23:33,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:23:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:23:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 09:23:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-02-15 09:23:33,774 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-02-15 09:23:33,841 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:23:33,842 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:23:33,997 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:23:34,006 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:23:34,006 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 09:23:34,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:23:34 BoogieIcfgContainer [2023-02-15 09:23:34,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:23:34,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:23:34,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:23:34,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:23:34,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:23:33" (1/3) ... [2023-02-15 09:23:34,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae990c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:23:34, skipping insertion in model container [2023-02-15 09:23:34,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:33" (2/3) ... [2023-02-15 09:23:34,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae990c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:23:34, skipping insertion in model container [2023-02-15 09:23:34,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:23:34" (3/3) ... [2023-02-15 09:23:34,016 INFO L112 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2023-02-15 09:23:34,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:23:34,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:23:34,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:23:34,067 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;@5d8e61e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:23:34,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:23:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 09:23:34,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:34,078 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:34,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2023-02-15 09:23:34,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:34,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597161577] [2023-02-15 09:23:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:34,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 09:23:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 09:23:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:23:34,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597161577] [2023-02-15 09:23:34,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597161577] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:23:34,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:23:34,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 09:23:34,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827275257] [2023-02-15 09:23:34,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:23:34,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:23:34,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:34,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:23:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:23:34,381 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 09:23:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:34,415 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2023-02-15 09:23:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:23:34,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-15 09:23:34,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:34,423 INFO L225 Difference]: With dead ends: 52 [2023-02-15 09:23:34,423 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 09:23:34,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:23:34,430 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:34,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 09:23:34,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-15 09:23:34,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-15 09:23:34,454 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2023-02-15 09:23:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:34,454 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-15 09:23:34,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 09:23:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-15 09:23:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 09:23:34,455 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:34,455 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:34,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 09:23:34,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:34,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2023-02-15 09:23:34,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:34,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775996712] [2023-02-15 09:23:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:34,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 09:23:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 09:23:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 09:23:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:23:34,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:34,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775996712] [2023-02-15 09:23:34,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775996712] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:34,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778423153] [2023-02-15 09:23:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:34,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:34,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:34,545 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) [2023-02-15 09:23:34,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 09:23:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 09:23:34,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:23:34,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:23:34,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778423153] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:23:34,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:23:34,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-15 09:23:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175516921] [2023-02-15 09:23:34,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:23:34,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:23:34,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:34,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:23:34,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:23:34,663 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:23:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:34,671 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-02-15 09:23:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:23:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-15 09:23:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:34,672 INFO L225 Difference]: With dead ends: 45 [2023-02-15 09:23:34,672 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 09:23:34,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:23:34,674 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:34,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 09:23:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-15 09:23:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-15 09:23:34,678 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2023-02-15 09:23:34,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:34,678 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-15 09:23:34,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:23:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-15 09:23:34,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 09:23:34,679 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:34,679 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:34,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 09:23:34,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:34,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2023-02-15 09:23:34,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:34,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263554617] [2023-02-15 09:23:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:34,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 09:23:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-15 09:23:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 09:23:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 09:23:34,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:34,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263554617] [2023-02-15 09:23:34,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263554617] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:34,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237392530] [2023-02-15 09:23:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:34,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:34,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:34,983 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) [2023-02-15 09:23:35,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 09:23:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:35,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 09:23:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 09:23:35,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:23:35,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237392530] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:23:35,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:23:35,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-02-15 09:23:35,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520424814] [2023-02-15 09:23:35,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:23:35,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:23:35,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:35,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:23:35,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:23:35,067 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:23:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:35,075 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-02-15 09:23:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:23:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-02-15 09:23:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:35,076 INFO L225 Difference]: With dead ends: 41 [2023-02-15 09:23:35,076 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 09:23:35,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:23:35,077 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:35,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 09:23:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-02-15 09:23:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-15 09:23:35,081 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2023-02-15 09:23:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:35,082 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-15 09:23:35,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:23:35,083 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-15 09:23:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 09:23:35,083 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:35,084 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:35,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 09:23:35,288 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,SelfDestructingSolverStorable2 [2023-02-15 09:23:35,288 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:35,289 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2023-02-15 09:23:35,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:35,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698279334] [2023-02-15 09:23:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:35,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:35,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 09:23:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:35,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-15 09:23:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:35,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 09:23:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:23:35,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:35,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698279334] [2023-02-15 09:23:35,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698279334] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:35,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951851028] [2023-02-15 09:23:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:35,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:35,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:35,450 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) [2023-02-15 09:23:35,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 09:23:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:35,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 09:23:35,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 09:23:35,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 09:23:35,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951851028] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:35,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:35,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-15 09:23:35,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697461048] [2023-02-15 09:23:35,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:35,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 09:23:35,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 09:23:35,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 09:23:35,568 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 09:23:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:35,597 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-02-15 09:23:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 09:23:35,597 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-15 09:23:35,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:35,598 INFO L225 Difference]: With dead ends: 58 [2023-02-15 09:23:35,598 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 09:23:35,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 09:23:35,599 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:35,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 156 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:35,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 09:23:35,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-02-15 09:23:35,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:35,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-15 09:23:35,602 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2023-02-15 09:23:35,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:35,603 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-15 09:23:35,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 09:23:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-15 09:23:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 09:23:35,604 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:35,604 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:35,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:35,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:35,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:35,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2023-02-15 09:23:35,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:35,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264586276] [2023-02-15 09:23:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:35,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:35,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 09:23:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:35,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 09:23:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:35,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-15 09:23:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-02-15 09:23:35,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:35,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264586276] [2023-02-15 09:23:35,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264586276] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:35,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614482405] [2023-02-15 09:23:35,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:23:35,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:35,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:35,943 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) [2023-02-15 09:23:35,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 09:23:36,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:23:36,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:36,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:23:36,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 09:23:36,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 09:23:36,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614482405] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:36,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:36,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-15 09:23:36,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961740831] [2023-02-15 09:23:36,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:36,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 09:23:36,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:36,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 09:23:36,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 09:23:36,125 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 09:23:36,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:36,166 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2023-02-15 09:23:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 09:23:36,167 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2023-02-15 09:23:36,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:36,167 INFO L225 Difference]: With dead ends: 74 [2023-02-15 09:23:36,168 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 09:23:36,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 09:23:36,168 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:36,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:36,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 09:23:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-02-15 09:23:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-02-15 09:23:36,173 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2023-02-15 09:23:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:36,173 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-02-15 09:23:36,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 09:23:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-02-15 09:23:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 09:23:36,175 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:36,175 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:36,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 09:23:36,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:36,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:36,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2023-02-15 09:23:36,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:36,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972941642] [2023-02-15 09:23:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 09:23:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:36,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:23:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:36,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 09:23:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-15 09:23:36,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972941642] [2023-02-15 09:23:36,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972941642] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336106451] [2023-02-15 09:23:36,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:23:36,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:36,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:36,682 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) [2023-02-15 09:23:36,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 09:23:36,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 09:23:36,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:36,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 09:23:36,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-15 09:23:36,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-15 09:23:36,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336106451] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:36,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:36,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-15 09:23:36,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072755082] [2023-02-15 09:23:36,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:36,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 09:23:36,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:36,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 09:23:36,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-15 09:23:36,844 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:36,883 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2023-02-15 09:23:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 09:23:36,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2023-02-15 09:23:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:36,884 INFO L225 Difference]: With dead ends: 90 [2023-02-15 09:23:36,884 INFO L226 Difference]: Without dead ends: 64 [2023-02-15 09:23:36,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-15 09:23:36,885 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:36,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 118 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-15 09:23:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-02-15 09:23:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2023-02-15 09:23:36,890 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2023-02-15 09:23:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:36,890 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2023-02-15 09:23:36,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2023-02-15 09:23:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-15 09:23:36,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:36,892 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:36,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:37,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:37,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:37,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:37,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2023-02-15 09:23:37,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:37,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045745578] [2023-02-15 09:23:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:37,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:37,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-15 09:23:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:37,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-15 09:23:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:37,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-15 09:23:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-15 09:23:37,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:37,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045745578] [2023-02-15 09:23:37,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045745578] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:37,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712657073] [2023-02-15 09:23:37,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:23:37,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:37,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:37,355 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) [2023-02-15 09:23:37,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 09:23:37,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:23:37,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:37,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 09:23:37,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-15 09:23:37,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-15 09:23:37,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712657073] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:37,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:37,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-02-15 09:23:37,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796497761] [2023-02-15 09:23:37,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:37,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 09:23:37,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:37,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 09:23:37,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-15 09:23:37,690 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 09:23:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:37,744 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2023-02-15 09:23:37,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 09:23:37,744 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2023-02-15 09:23:37,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:37,745 INFO L225 Difference]: With dead ends: 127 [2023-02-15 09:23:37,745 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 09:23:37,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-15 09:23:37,746 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:37,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 09:23:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-15 09:23:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-02-15 09:23:37,751 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 108 [2023-02-15 09:23:37,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:37,751 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-02-15 09:23:37,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 09:23:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-02-15 09:23:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-15 09:23:37,753 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:37,753 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:37,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:37,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:37,959 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:37,959 INFO L85 PathProgramCache]: Analyzing trace with hash 819840039, now seen corresponding path program 5 times [2023-02-15 09:23:37,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:37,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285514198] [2023-02-15 09:23:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:37,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:38,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-15 09:23:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:38,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-02-15 09:23:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:38,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-02-15 09:23:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-15 09:23:38,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:38,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285514198] [2023-02-15 09:23:38,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285514198] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:38,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783337995] [2023-02-15 09:23:38,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:23:38,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:38,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:38,562 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) [2023-02-15 09:23:38,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 09:23:40,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-02-15 09:23:40,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:23:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2023-02-15 09:23:40,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2023-02-15 09:23:41,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783337995] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:41,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:41,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2023-02-15 09:23:41,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15981891] [2023-02-15 09:23:41,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:41,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 09:23:41,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:41,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 09:23:41,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 09:23:41,098 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:41,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:41,173 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2023-02-15 09:23:41,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 09:23:41,174 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 134 [2023-02-15 09:23:41,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:41,175 INFO L225 Difference]: With dead ends: 154 [2023-02-15 09:23:41,175 INFO L226 Difference]: Without dead ends: 116 [2023-02-15 09:23:41,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 09:23:41,176 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:41,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 194 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:23:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-15 09:23:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2023-02-15 09:23:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2023-02-15 09:23:41,182 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 134 [2023-02-15 09:23:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:41,182 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2023-02-15 09:23:41,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2023-02-15 09:23:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-02-15 09:23:41,184 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:41,184 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 25, 25, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:41,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:41,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:41,407 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:41,407 INFO L85 PathProgramCache]: Analyzing trace with hash 412352681, now seen corresponding path program 6 times [2023-02-15 09:23:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:41,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738045024] [2023-02-15 09:23:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:41,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:42,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-02-15 09:23:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:42,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-02-15 09:23:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:42,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-02-15 09:23:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2728 trivial. 0 not checked. [2023-02-15 09:23:42,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:42,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738045024] [2023-02-15 09:23:42,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738045024] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:42,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644494533] [2023-02-15 09:23:42,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:23:42,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:42,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:42,233 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) [2023-02-15 09:23:42,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 09:23:42,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 09:23:42,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:42,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 09:23:42,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2023-02-15 09:23:42,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3349 trivial. 0 not checked. [2023-02-15 09:23:42,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644494533] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:42,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:42,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2023-02-15 09:23:42,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041510419] [2023-02-15 09:23:42,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:42,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 09:23:42,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:42,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 09:23:42,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 09:23:42,453 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:42,525 INFO L93 Difference]: Finished difference Result 188 states and 228 transitions. [2023-02-15 09:23:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 09:23:42,526 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 208 [2023-02-15 09:23:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:42,527 INFO L225 Difference]: With dead ends: 188 [2023-02-15 09:23:42,527 INFO L226 Difference]: Without dead ends: 126 [2023-02-15 09:23:42,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 09:23:42,528 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:42,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 199 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:23:42,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-15 09:23:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2023-02-15 09:23:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 120 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2023-02-15 09:23:42,533 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 208 [2023-02-15 09:23:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:42,533 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2023-02-15 09:23:42,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2023-02-15 09:23:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-02-15 09:23:42,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:42,535 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:42,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:42,740 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,SelfDestructingSolverStorable8 [2023-02-15 09:23:42,741 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:42,741 INFO L85 PathProgramCache]: Analyzing trace with hash 559440675, now seen corresponding path program 7 times [2023-02-15 09:23:42,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:42,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541869956] [2023-02-15 09:23:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:42,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:43,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 09:23:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:43,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-02-15 09:23:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:43,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-02-15 09:23:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-15 09:23:43,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:43,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541869956] [2023-02-15 09:23:43,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541869956] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:43,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985764361] [2023-02-15 09:23:43,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:23:43,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:43,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:43,541 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) [2023-02-15 09:23:43,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 09:23:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:43,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 09:23:43,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-15 09:23:43,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-15 09:23:44,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985764361] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:44,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:44,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2023-02-15 09:23:44,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193252863] [2023-02-15 09:23:44,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:44,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-15 09:23:44,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-15 09:23:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 09:23:44,548 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 09:23:44,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:44,650 INFO L93 Difference]: Finished difference Result 251 states and 314 transitions. [2023-02-15 09:23:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 09:23:44,651 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 218 [2023-02-15 09:23:44,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:44,651 INFO L225 Difference]: With dead ends: 251 [2023-02-15 09:23:44,651 INFO L226 Difference]: Without dead ends: 181 [2023-02-15 09:23:44,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 09:23:44,653 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:44,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 170 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:23:44,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-15 09:23:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-02-15 09:23:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0965909090909092) internal successors, (193), 176 states have internal predecessors, (193), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2023-02-15 09:23:44,658 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 218 [2023-02-15 09:23:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:44,659 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2023-02-15 09:23:44,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 09:23:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2023-02-15 09:23:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-02-15 09:23:44,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:44,661 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:44,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 09:23:44,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 09:23:44,867 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:44,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1032547419, now seen corresponding path program 8 times [2023-02-15 09:23:44,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:44,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823235322] [2023-02-15 09:23:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:44,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:46,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-02-15 09:23:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:46,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2023-02-15 09:23:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:46,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2023-02-15 09:23:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-15 09:23:46,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:46,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823235322] [2023-02-15 09:23:46,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823235322] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:46,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338704109] [2023-02-15 09:23:46,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:23:46,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:46,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:46,848 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) [2023-02-15 09:23:46,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 09:23:47,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:23:47,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:47,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 09:23:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-15 09:23:47,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-15 09:23:48,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338704109] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:48,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:48,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 63 [2023-02-15 09:23:48,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248755379] [2023-02-15 09:23:48,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:48,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-15 09:23:48,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:48,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-15 09:23:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 09:23:48,420 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 09:23:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:48,528 INFO L93 Difference]: Finished difference Result 263 states and 304 transitions. [2023-02-15 09:23:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-15 09:23:48,528 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 274 [2023-02-15 09:23:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:48,529 INFO L225 Difference]: With dead ends: 263 [2023-02-15 09:23:48,529 INFO L226 Difference]: Without dead ends: 193 [2023-02-15 09:23:48,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 498 SyntacticMatches, 50 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 09:23:48,530 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:48,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:23:48,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-15 09:23:48,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-02-15 09:23:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0904255319148937) internal successors, (205), 188 states have internal predecessors, (205), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2023-02-15 09:23:48,537 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 274 [2023-02-15 09:23:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:48,538 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2023-02-15 09:23:48,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 09:23:48,538 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2023-02-15 09:23:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-15 09:23:48,540 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:48,540 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:48,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-15 09:23:48,746 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,SelfDestructingSolverStorable10 [2023-02-15 09:23:48,747 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:48,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash -33288217, now seen corresponding path program 9 times [2023-02-15 09:23:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:48,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823063665] [2023-02-15 09:23:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:49,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-02-15 09:23:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:49,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2023-02-15 09:23:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:49,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2023-02-15 09:23:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 4833 trivial. 0 not checked. [2023-02-15 09:23:49,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:49,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823063665] [2023-02-15 09:23:49,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823063665] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:49,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232854664] [2023-02-15 09:23:49,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:23:49,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:49,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:49,334 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) [2023-02-15 09:23:49,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 09:23:49,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 09:23:49,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:23:49,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 1242 proven. 36 refuted. 0 times theorem prover too weak. 5082 trivial. 0 not checked. [2023-02-15 09:23:49,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6324 trivial. 0 not checked. [2023-02-15 09:23:49,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232854664] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:49,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:49,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2023-02-15 09:23:49,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226005255] [2023-02-15 09:23:49,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:49,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 09:23:49,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:49,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 09:23:49,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-02-15 09:23:49,883 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:49,938 INFO L93 Difference]: Finished difference Result 283 states and 331 transitions. [2023-02-15 09:23:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 09:23:49,938 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 286 [2023-02-15 09:23:49,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:49,939 INFO L225 Difference]: With dead ends: 283 [2023-02-15 09:23:49,939 INFO L226 Difference]: Without dead ends: 214 [2023-02-15 09:23:49,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-02-15 09:23:49,940 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:49,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 137 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:49,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-02-15 09:23:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2023-02-15 09:23:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0869565217391304) internal successors, (225), 207 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 231 transitions. [2023-02-15 09:23:49,945 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 231 transitions. Word has length 286 [2023-02-15 09:23:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:49,945 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 231 transitions. [2023-02-15 09:23:49,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 231 transitions. [2023-02-15 09:23:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2023-02-15 09:23:49,948 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:49,948 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:49,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:50,153 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,SelfDestructingSolverStorable11 [2023-02-15 09:23:50,153 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:50,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:50,153 INFO L85 PathProgramCache]: Analyzing trace with hash -512401555, now seen corresponding path program 10 times [2023-02-15 09:23:50,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:50,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196459243] [2023-02-15 09:23:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:50,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:50,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-02-15 09:23:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:50,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2023-02-15 09:23:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:50,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-02-15 09:23:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2023-02-15 09:23:50,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:50,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196459243] [2023-02-15 09:23:50,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196459243] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:50,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705020321] [2023-02-15 09:23:50,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:23:50,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:50,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:50,902 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) [2023-02-15 09:23:50,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 09:23:51,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:23:51,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:51,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 09:23:51,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2023-02-15 09:23:51,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2023-02-15 09:23:51,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705020321] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:51,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:51,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-02-15 09:23:51,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980997564] [2023-02-15 09:23:51,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:51,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 09:23:51,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 09:23:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 09:23:51,571 INFO L87 Difference]: Start difference. First operand 212 states and 231 transitions. Second operand has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:51,628 INFO L93 Difference]: Finished difference Result 351 states and 424 transitions. [2023-02-15 09:23:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 09:23:51,628 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 311 [2023-02-15 09:23:51,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:51,629 INFO L225 Difference]: With dead ends: 351 [2023-02-15 09:23:51,629 INFO L226 Difference]: Without dead ends: 263 [2023-02-15 09:23:51,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 09:23:51,630 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 97 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:51,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 154 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-02-15 09:23:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2023-02-15 09:23:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.1356589147286822) internal successors, (293), 258 states have internal predecessors, (293), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 299 transitions. [2023-02-15 09:23:51,635 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 299 transitions. Word has length 311 [2023-02-15 09:23:51,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:51,636 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 299 transitions. [2023-02-15 09:23:51,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 299 transitions. [2023-02-15 09:23:51,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-02-15 09:23:51,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:51,640 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:51,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:51,846 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,SelfDestructingSolverStorable12 [2023-02-15 09:23:51,846 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:51,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:51,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1295900265, now seen corresponding path program 11 times [2023-02-15 09:23:51,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:51,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266496375] [2023-02-15 09:23:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:51,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:52,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-02-15 09:23:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:53,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2023-02-15 09:23:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:53,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 359 [2023-02-15 09:23:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17779 backedges. 0 proven. 7800 refuted. 0 times theorem prover too weak. 9979 trivial. 0 not checked. [2023-02-15 09:23:53,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:53,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266496375] [2023-02-15 09:23:53,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266496375] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:53,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314414418] [2023-02-15 09:23:53,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:23:53,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:53,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:53,373 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) [2023-02-15 09:23:53,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process