./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/array-industry-pattern/check_removal_from_set_after_insertion.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 04:40:20,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 04:40:20,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 04:40:20,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 04:40:20,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 04:40:20,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 04:40:20,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 04:40:20,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 04:40:20,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 04:40:20,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 04:40:20,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 04:40:20,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 04:40:20,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 04:40:20,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 04:40:20,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 04:40:20,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 04:40:20,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 04:40:20,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 04:40:20,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 04:40:20,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 04:40:20,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 04:40:20,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 04:40:20,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 04:40:20,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 04:40:20,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 04:40:20,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 04:40:20,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 04:40:20,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 04:40:20,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 04:40:20,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 04:40:20,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 04:40:20,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 04:40:20,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 04:40:20,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 04:40:20,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 04:40:20,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 04:40:20,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 04:40:20,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 04:40:20,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 04:40:20,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 04:40:20,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 04:40:20,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 04:40:21,024 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 04:40:21,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 04:40:21,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 04:40:21,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 04:40:21,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 04:40:21,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 04:40:21,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 04:40:21,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 04:40:21,028 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 04:40:21,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 04:40:21,028 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 04:40:21,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 04:40:21,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 04:40:21,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 04:40:21,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 04:40:21,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 04:40:21,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 04:40:21,029 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 04:40:21,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 04:40:21,030 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 04:40:21,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 04:40:21,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 04:40:21,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 04:40:21,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 04:40:21,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 04:40:21,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 04:40:21,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 04:40:21,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 04:40:21,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 04:40:21,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 04:40:21,031 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 04:40:21,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 04:40:21,031 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 04:40:21,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 04:40:21,032 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 04:40:21,032 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2023-02-17 04:40:21,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 04:40:21,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 04:40:21,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 04:40:21,211 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 04:40:21,211 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 04:40:21,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-02-17 04:40:22,266 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 04:40:22,447 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 04:40:22,447 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-02-17 04:40:22,451 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bd3db508/a2a437565ed94bc0b0ab7ca69f0f4b27/FLAG5363eef56 [2023-02-17 04:40:22,460 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bd3db508/a2a437565ed94bc0b0ab7ca69f0f4b27 [2023-02-17 04:40:22,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 04:40:22,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 04:40:22,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 04:40:22,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 04:40:22,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 04:40:22,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e4ef10a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22, skipping insertion in model container [2023-02-17 04:40:22,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 04:40:22,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 04:40:22,559 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/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-02-17 04:40:22,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 04:40:22,579 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 04:40:22,586 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/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-02-17 04:40:22,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 04:40:22,601 INFO L208 MainTranslator]: Completed translation [2023-02-17 04:40:22,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22 WrapperNode [2023-02-17 04:40:22,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 04:40:22,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 04:40:22,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 04:40:22,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 04:40:22,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,624 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2023-02-17 04:40:22,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 04:40:22,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 04:40:22,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 04:40:22,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 04:40:22,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,659 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 04:40:22,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 04:40:22,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 04:40:22,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 04:40:22,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (1/1) ... [2023-02-17 04:40:22,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 04:40:22,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:22,697 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) [2023-02-17 04:40:22,715 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 [2023-02-17 04:40:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 04:40:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 04:40:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 04:40:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 04:40:22,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 04:40:22,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 04:40:22,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 04:40:22,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 04:40:22,781 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 04:40:22,782 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 04:40:22,990 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 04:40:22,995 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 04:40:22,995 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-17 04:40:22,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 04:40:22 BoogieIcfgContainer [2023-02-17 04:40:22,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 04:40:22,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 04:40:22,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 04:40:23,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 04:40:23,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 04:40:22" (1/3) ... [2023-02-17 04:40:23,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f417fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 04:40:23, skipping insertion in model container [2023-02-17 04:40:23,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:22" (2/3) ... [2023-02-17 04:40:23,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f417fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 04:40:23, skipping insertion in model container [2023-02-17 04:40:23,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 04:40:22" (3/3) ... [2023-02-17 04:40:23,002 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2023-02-17 04:40:23,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 04:40:23,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 04:40:23,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 04:40:23,080 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;@24ca00df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 04:40:23,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 04:40:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 04:40:23,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:23,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:23,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:23,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1525882359, now seen corresponding path program 1 times [2023-02-17 04:40:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:23,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275854636] [2023-02-17 04:40:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:23,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:23,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275854636] [2023-02-17 04:40:23,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275854636] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:40:23,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:40:23,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 04:40:23,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501917430] [2023-02-17 04:40:23,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:40:23,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 04:40:23,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:23,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 04:40:23,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:40:23,339 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:23,431 INFO L93 Difference]: Finished difference Result 77 states and 118 transitions. [2023-02-17 04:40:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 04:40:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-17 04:40:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:23,443 INFO L225 Difference]: With dead ends: 77 [2023-02-17 04:40:23,443 INFO L226 Difference]: Without dead ends: 41 [2023-02-17 04:40:23,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:40:23,448 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:23,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:23,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-17 04:40:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2023-02-17 04:40:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2023-02-17 04:40:23,485 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 12 [2023-02-17 04:40:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:23,486 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2023-02-17 04:40:23,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2023-02-17 04:40:23,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 04:40:23,487 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:23,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:23,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 04:40:23,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:23,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1053753351, now seen corresponding path program 1 times [2023-02-17 04:40:23,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:23,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897925072] [2023-02-17 04:40:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:23,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 04:40:23,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:23,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897925072] [2023-02-17 04:40:23,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897925072] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:40:23,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:40:23,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 04:40:23,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282408999] [2023-02-17 04:40:23,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:40:23,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 04:40:23,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:23,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 04:40:23,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:40:23,567 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:23,604 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2023-02-17 04:40:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 04:40:23,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-17 04:40:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:23,605 INFO L225 Difference]: With dead ends: 52 [2023-02-17 04:40:23,605 INFO L226 Difference]: Without dead ends: 38 [2023-02-17 04:40:23,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:40:23,607 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:23,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 48 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-17 04:40:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2023-02-17 04:40:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-17 04:40:23,616 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 14 [2023-02-17 04:40:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:23,617 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-17 04:40:23,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-17 04:40:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 04:40:23,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:23,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:23,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 04:40:23,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:23,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1072948653, now seen corresponding path program 1 times [2023-02-17 04:40:23,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:23,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910594522] [2023-02-17 04:40:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:23,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 04:40:23,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:23,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910594522] [2023-02-17 04:40:23,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910594522] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:40:23,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:40:23,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 04:40:23,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138013663] [2023-02-17 04:40:23,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:40:23,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 04:40:23,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:23,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 04:40:23,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:40:23,751 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:23,795 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2023-02-17 04:40:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 04:40:23,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-17 04:40:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:23,796 INFO L225 Difference]: With dead ends: 90 [2023-02-17 04:40:23,797 INFO L226 Difference]: Without dead ends: 67 [2023-02-17 04:40:23,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 04:40:23,798 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 72 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:23,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 96 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-17 04:40:23,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2023-02-17 04:40:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-02-17 04:40:23,804 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 20 [2023-02-17 04:40:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:23,805 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-02-17 04:40:23,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-02-17 04:40:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 04:40:23,806 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:23,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:23,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 04:40:23,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:23,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1602550877, now seen corresponding path program 1 times [2023-02-17 04:40:23,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:23,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700800620] [2023-02-17 04:40:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:23,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 04:40:23,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:23,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700800620] [2023-02-17 04:40:23,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700800620] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:40:23,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:40:23,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 04:40:23,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650818028] [2023-02-17 04:40:23,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:40:23,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 04:40:23,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:23,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 04:40:23,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:40:23,917 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:23,932 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2023-02-17 04:40:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 04:40:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-17 04:40:23,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:23,933 INFO L225 Difference]: With dead ends: 82 [2023-02-17 04:40:23,933 INFO L226 Difference]: Without dead ends: 53 [2023-02-17 04:40:23,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 04:40:23,934 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:23,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-17 04:40:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2023-02-17 04:40:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-17 04:40:23,939 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2023-02-17 04:40:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:23,939 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-17 04:40:23,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-17 04:40:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 04:40:23,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:23,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:23,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 04:40:23,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash -969039925, now seen corresponding path program 1 times [2023-02-17 04:40:23,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:23,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113604301] [2023-02-17 04:40:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:23,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:40:23,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:23,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113604301] [2023-02-17 04:40:23,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113604301] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:40:23,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:40:23,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 04:40:23,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083315976] [2023-02-17 04:40:23,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:40:23,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 04:40:23,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:23,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 04:40:23,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 04:40:23,971 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:23,983 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-17 04:40:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 04:40:23,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-17 04:40:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:23,984 INFO L225 Difference]: With dead ends: 46 [2023-02-17 04:40:23,984 INFO L226 Difference]: Without dead ends: 35 [2023-02-17 04:40:23,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 04:40:23,985 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:23,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:23,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-17 04:40:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-17 04:40:23,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-02-17 04:40:23,990 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 21 [2023-02-17 04:40:23,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:23,990 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-02-17 04:40:23,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-02-17 04:40:23,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 04:40:23,991 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:23,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:23,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 04:40:23,991 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:23,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:23,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1842211539, now seen corresponding path program 1 times [2023-02-17 04:40:23,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:23,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695048422] [2023-02-17 04:40:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:23,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:40:24,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:24,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695048422] [2023-02-17 04:40:24,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695048422] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:24,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115254893] [2023-02-17 04:40:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:24,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:24,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:24,064 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) [2023-02-17 04:40:24,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 04:40:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 04:40:24,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:40:24,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:40:24,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115254893] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:24,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:24,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-02-17 04:40:24,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601335946] [2023-02-17 04:40:24,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:24,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 04:40:24,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:24,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 04:40:24,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-17 04:40:24,216 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:24,390 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2023-02-17 04:40:24,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 04:40:24,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-17 04:40:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:24,394 INFO L225 Difference]: With dead ends: 141 [2023-02-17 04:40:24,394 INFO L226 Difference]: Without dead ends: 111 [2023-02-17 04:40:24,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2023-02-17 04:40:24,398 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 132 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:24,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 92 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-17 04:40:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 51. [2023-02-17 04:40:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-02-17 04:40:24,405 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2023-02-17 04:40:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:24,405 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-02-17 04:40:24,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-02-17 04:40:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 04:40:24,406 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:24,407 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:24,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 04:40:24,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-17 04:40:24,612 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:24,613 INFO L85 PathProgramCache]: Analyzing trace with hash 492833075, now seen corresponding path program 2 times [2023-02-17 04:40:24,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:24,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421515874] [2023-02-17 04:40:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:24,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 04:40:24,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:24,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421515874] [2023-02-17 04:40:24,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421515874] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:40:24,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:40:24,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 04:40:24,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281689113] [2023-02-17 04:40:24,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:40:24,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 04:40:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:24,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 04:40:24,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 04:40:24,655 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:24,663 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2023-02-17 04:40:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 04:40:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-17 04:40:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:24,664 INFO L225 Difference]: With dead ends: 66 [2023-02-17 04:40:24,664 INFO L226 Difference]: Without dead ends: 51 [2023-02-17 04:40:24,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 04:40:24,665 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 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 [2023-02-17 04:40:24,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-17 04:40:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-17 04:40:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2023-02-17 04:40:24,671 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 34 [2023-02-17 04:40:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:24,671 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2023-02-17 04:40:24,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:24,671 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2023-02-17 04:40:24,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 04:40:24,672 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:24,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:24,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 04:40:24,672 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash 750998513, now seen corresponding path program 1 times [2023-02-17 04:40:24,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:24,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98568054] [2023-02-17 04:40:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:24,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:40:24,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:24,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98568054] [2023-02-17 04:40:24,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98568054] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:24,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836387810] [2023-02-17 04:40:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:24,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:24,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:24,766 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) [2023-02-17 04:40:24,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 04:40:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 04:40:24,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:40:24,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:40:24,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836387810] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:24,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:24,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-02-17 04:40:24,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575891610] [2023-02-17 04:40:24,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:24,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 04:40:24,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 04:40:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2023-02-17 04:40:24,906 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:25,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:25,083 INFO L93 Difference]: Finished difference Result 204 states and 234 transitions. [2023-02-17 04:40:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 04:40:25,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-17 04:40:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:25,085 INFO L225 Difference]: With dead ends: 204 [2023-02-17 04:40:25,085 INFO L226 Difference]: Without dead ends: 164 [2023-02-17 04:40:25,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2023-02-17 04:40:25,086 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 257 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:25,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 150 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:25,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-02-17 04:40:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 63. [2023-02-17 04:40:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2023-02-17 04:40:25,093 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 34 [2023-02-17 04:40:25,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:25,094 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2023-02-17 04:40:25,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2023-02-17 04:40:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 04:40:25,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:25,095 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:25,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:25,300 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,SelfDestructingSolverStorable7 [2023-02-17 04:40:25,301 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:25,301 INFO L85 PathProgramCache]: Analyzing trace with hash -452665475, now seen corresponding path program 2 times [2023-02-17 04:40:25,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:25,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894106218] [2023-02-17 04:40:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:25,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:40:25,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:25,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894106218] [2023-02-17 04:40:25,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894106218] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:25,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238624414] [2023-02-17 04:40:25,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:40:25,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:25,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:25,541 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) [2023-02-17 04:40:25,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 04:40:25,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:40:25,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:25,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 04:40:25,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:40:25,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:40:25,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238624414] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:25,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:25,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-02-17 04:40:25,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880215504] [2023-02-17 04:40:25,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:25,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-17 04:40:25,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:25,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-17 04:40:25,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2023-02-17 04:40:25,900 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:26,314 INFO L93 Difference]: Finished difference Result 372 states and 420 transitions. [2023-02-17 04:40:26,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 04:40:26,314 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-17 04:40:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:26,316 INFO L225 Difference]: With dead ends: 372 [2023-02-17 04:40:26,316 INFO L226 Difference]: Without dead ends: 332 [2023-02-17 04:40:26,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2023-02-17 04:40:26,317 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1062 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:26,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1062 Valid, 203 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:40:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-02-17 04:40:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 87. [2023-02-17 04:40:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 86 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2023-02-17 04:40:26,326 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 46 [2023-02-17 04:40:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:26,326 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2023-02-17 04:40:26,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2023-02-17 04:40:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-17 04:40:26,328 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:26,328 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:26,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:26,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:26,534 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:26,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1586487147, now seen corresponding path program 3 times [2023-02-17 04:40:26,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:26,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104451135] [2023-02-17 04:40:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:26,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:40:27,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:27,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104451135] [2023-02-17 04:40:27,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104451135] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:27,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998622004] [2023-02-17 04:40:27,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:40:27,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:27,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:27,057 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) [2023-02-17 04:40:27,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 04:40:27,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 04:40:27,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:27,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 04:40:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2023-02-17 04:40:27,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2023-02-17 04:40:27,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998622004] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:27,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:27,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 30 [2023-02-17 04:40:27,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408261916] [2023-02-17 04:40:27,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:27,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-17 04:40:27,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:27,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-17 04:40:27,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2023-02-17 04:40:27,254 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:27,822 INFO L93 Difference]: Finished difference Result 427 states and 474 transitions. [2023-02-17 04:40:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-17 04:40:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-02-17 04:40:27,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:27,837 INFO L225 Difference]: With dead ends: 427 [2023-02-17 04:40:27,837 INFO L226 Difference]: Without dead ends: 387 [2023-02-17 04:40:27,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=935, Invalid=2035, Unknown=0, NotChecked=0, Total=2970 [2023-02-17 04:40:27,838 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 953 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:27,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 228 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:40:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-02-17 04:40:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 117. [2023-02-17 04:40:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2023-02-17 04:40:27,848 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 70 [2023-02-17 04:40:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:27,848 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2023-02-17 04:40:27,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2023-02-17 04:40:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-17 04:40:27,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:27,850 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:27,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 04:40:28,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:28,055 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1867228667, now seen corresponding path program 1 times [2023-02-17 04:40:28,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:28,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411044560] [2023-02-17 04:40:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:28,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:40:28,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:28,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411044560] [2023-02-17 04:40:28,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411044560] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:28,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048122759] [2023-02-17 04:40:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:28,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:28,603 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) [2023-02-17 04:40:28,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 04:40:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:28,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 04:40:28,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:40:29,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:40:29,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048122759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:29,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:29,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 75 [2023-02-17 04:40:29,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255301165] [2023-02-17 04:40:29,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:29,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-17 04:40:29,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:29,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-17 04:40:29,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=3197, Unknown=0, NotChecked=0, Total=5700 [2023-02-17 04:40:29,711 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:31,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:31,217 INFO L93 Difference]: Finished difference Result 792 states and 891 transitions. [2023-02-17 04:40:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-17 04:40:31,218 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-02-17 04:40:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:31,220 INFO L225 Difference]: With dead ends: 792 [2023-02-17 04:40:31,220 INFO L226 Difference]: Without dead ends: 724 [2023-02-17 04:40:31,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3502 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3775, Invalid=6125, Unknown=0, NotChecked=0, Total=9900 [2023-02-17 04:40:31,223 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2426 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2426 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:31,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2426 Valid, 339 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 04:40:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2023-02-17 04:40:31,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 167. [2023-02-17 04:40:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 166 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 181 transitions. [2023-02-17 04:40:31,234 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 181 transitions. Word has length 90 [2023-02-17 04:40:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:31,234 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 181 transitions. [2023-02-17 04:40:31,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:31,235 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 181 transitions. [2023-02-17 04:40:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-02-17 04:40:31,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:31,236 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:31,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:31,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-17 04:40:31,442 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:31,443 INFO L85 PathProgramCache]: Analyzing trace with hash 838087341, now seen corresponding path program 2 times [2023-02-17 04:40:31,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:31,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923117477] [2023-02-17 04:40:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:31,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:40:33,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:33,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923117477] [2023-02-17 04:40:33,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923117477] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:33,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135688792] [2023-02-17 04:40:33,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:40:33,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:33,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:33,400 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) [2023-02-17 04:40:33,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 04:40:33,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:40:33,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:33,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-17 04:40:33,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:40:34,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:40:36,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135688792] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:36,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:36,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 150 [2023-02-17 04:40:36,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021836087] [2023-02-17 04:40:36,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:36,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-02-17 04:40:36,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-02-17 04:40:36,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10003, Invalid=12647, Unknown=0, NotChecked=0, Total=22650 [2023-02-17 04:40:36,598 INFO L87 Difference]: Start difference. First operand 167 states and 181 transitions. Second operand has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:43,013 INFO L93 Difference]: Finished difference Result 1492 states and 1666 transitions. [2023-02-17 04:40:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-17 04:40:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2023-02-17 04:40:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:43,018 INFO L225 Difference]: With dead ends: 1492 [2023-02-17 04:40:43,018 INFO L226 Difference]: Without dead ends: 1424 [2023-02-17 04:40:43,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14502 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=15050, Invalid=24750, Unknown=0, NotChecked=0, Total=39800 [2023-02-17 04:40:43,025 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5289 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5289 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:43,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5289 Valid, 685 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [848 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 04:40:43,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2023-02-17 04:40:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 267. [2023-02-17 04:40:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.056390977443609) internal successors, (281), 266 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 281 transitions. [2023-02-17 04:40:43,049 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 281 transitions. Word has length 140 [2023-02-17 04:40:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:43,050 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 281 transitions. [2023-02-17 04:40:43,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 281 transitions. [2023-02-17 04:40:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-02-17 04:40:43,054 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:43,054 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:43,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:43,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:43,262 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:43,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:43,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1802074769, now seen corresponding path program 3 times [2023-02-17 04:40:43,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:43,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380699286] [2023-02-17 04:40:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:43,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:40:49,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:49,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380699286] [2023-02-17 04:40:49,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380699286] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:49,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206661428] [2023-02-17 04:40:49,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:40:49,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:49,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:49,256 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) [2023-02-17 04:40:49,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 04:40:49,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 04:40:49,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:49,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 04:40:49,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9641 trivial. 0 not checked. [2023-02-17 04:40:49,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9641 trivial. 0 not checked. [2023-02-17 04:40:49,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206661428] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:49,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:49,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 108 [2023-02-17 04:40:49,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409084041] [2023-02-17 04:40:49,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:49,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2023-02-17 04:40:49,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2023-02-17 04:40:49,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5478, Invalid=6294, Unknown=0, NotChecked=0, Total=11772 [2023-02-17 04:40:49,778 INFO L87 Difference]: Start difference. First operand 267 states and 281 transitions. Second operand has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:12,543 INFO L93 Difference]: Finished difference Result 2964 states and 3197 transitions. [2023-02-17 04:41:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2023-02-17 04:41:12,544 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2023-02-17 04:41:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:12,551 INFO L225 Difference]: With dead ends: 2964 [2023-02-17 04:41:12,551 INFO L226 Difference]: Without dead ends: 2896 [2023-02-17 04:41:12,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 470 SyntacticMatches, 2 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46369 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=53146, Invalid=115364, Unknown=0, NotChecked=0, Total=168510 [2023-02-17 04:41:12,559 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 12040 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 2221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12040 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 3535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2221 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:12,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12040 Valid, 1021 Invalid, 3535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2221 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-17 04:41:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2023-02-17 04:41:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 770. [2023-02-17 04:41:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1495448634590377) internal successors, (884), 769 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 884 transitions. [2023-02-17 04:41:12,802 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 884 transitions. Word has length 240 [2023-02-17 04:41:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:12,802 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 884 transitions. [2023-02-17 04:41:12,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 884 transitions. [2023-02-17 04:41:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-02-17 04:41:12,804 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:12,805 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:12,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 04:41:13,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:13,010 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:13,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:13,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1263380961, now seen corresponding path program 1 times [2023-02-17 04:41:13,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:13,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85515607] [2023-02-17 04:41:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:13,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-17 04:41:18,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:18,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85515607] [2023-02-17 04:41:18,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85515607] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:18,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442236055] [2023-02-17 04:41:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:18,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:18,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:18,600 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) [2023-02-17 04:41:18,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 04:41:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:19,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2004 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-17 04:41:19,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-17 04:41:21,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-17 04:41:28,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442236055] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:28,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:28,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104, 104] total 309 [2023-02-17 04:41:28,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525597554] [2023-02-17 04:41:28,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:28,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 310 states [2023-02-17 04:41:28,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:28,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 310 interpolants. [2023-02-17 04:41:28,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42439, Invalid=53351, Unknown=0, NotChecked=0, Total=95790 [2023-02-17 04:41:28,637 INFO L87 Difference]: Start difference. First operand 770 states and 884 transitions. Second operand has 310 states, 310 states have (on average 2.064516129032258) internal successors, (640), 309 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:42:35,294 INFO L93 Difference]: Finished difference Result 3668 states and 4101 transitions. [2023-02-17 04:42:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2023-02-17 04:42:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 310 states, 310 states have (on average 2.064516129032258) internal successors, (640), 309 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2023-02-17 04:42:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:42:35,302 INFO L225 Difference]: With dead ends: 3668 [2023-02-17 04:42:35,302 INFO L226 Difference]: Without dead ends: 3103 [2023-02-17 04:42:35,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62626 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=63757, Invalid=105575, Unknown=0, NotChecked=0, Total=169332 [2023-02-17 04:42:35,309 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11197 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 2160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11197 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 4238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2160 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-17 04:42:35,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11197 Valid, 1337 Invalid, 4238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2160 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-17 04:42:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3103 states. [2023-02-17 04:42:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 976. [2023-02-17 04:42:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 1.117948717948718) internal successors, (1090), 975 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1090 transitions. [2023-02-17 04:42:35,534 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1090 transitions. Word has length 251 [2023-02-17 04:42:35,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:42:35,535 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1090 transitions. [2023-02-17 04:42:35,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 310 states, 310 states have (on average 2.064516129032258) internal successors, (640), 309 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1090 transitions. [2023-02-17 04:42:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-02-17 04:42:35,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:42:35,539 INFO L195 NwaCegarLoop]: trace histogram [204, 204, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:42:35,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 04:42:35,748 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,SelfDestructingSolverStorable13 [2023-02-17 04:42:35,748 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:42:35,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:42:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash -148650991, now seen corresponding path program 2 times [2023-02-17 04:42:35,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:42:35,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121316674] [2023-02-17 04:42:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:42:35,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:42:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:42:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 41666 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-17 04:42:55,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:42:55,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121316674] [2023-02-17 04:42:55,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121316674] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:42:55,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074116212] [2023-02-17 04:42:55,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:42:55,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:42:55,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:42:55,499 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) [2023-02-17 04:42:55,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 04:42:56,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:42:56,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:42:56,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 3755 conjuncts, 207 conjunts are in the unsatisfiable core [2023-02-17 04:42:56,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:43:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 41666 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-17 04:43:06,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:43:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 41666 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-17 04:43:34,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074116212] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:43:34,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:43:34,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [207, 207, 207] total 618 [2023-02-17 04:43:34,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274739892] [2023-02-17 04:43:34,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:43:34,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 619 states [2023-02-17 04:43:34,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:43:34,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 619 interpolants. [2023-02-17 04:43:34,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169747, Invalid=212795, Unknown=0, NotChecked=0, Total=382542 [2023-02-17 04:43:34,241 INFO L87 Difference]: Start difference. First operand 976 states and 1090 transitions. Second operand has 619 states, 619 states have (on average 2.0323101777059773) internal successors, (1258), 618 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)