./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/unroll-4.wvr.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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:57:14,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:57:14,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:57:14,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:57:14,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:57:14,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:57:14,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:57:15,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:57:15,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:57:15,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:57:15,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:57:15,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:57:15,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:57:15,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:57:15,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:57:15,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:57:15,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:57:15,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:57:15,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:57:15,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:57:15,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:57:15,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:57:15,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:57:15,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:57:15,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:57:15,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:57:15,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:57:15,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:57:15,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:57:15,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:57:15,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:57:15,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:57:15,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:57:15,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:57:15,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:57:15,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:57:15,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:57:15,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:57:15,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:57:15,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:57:15,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:57:15,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:57:15,079 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:57:15,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:57:15,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:57:15,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:57:15,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:57:15,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:57:15,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:57:15,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:57:15,082 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:57:15,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:57:15,083 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:57:15,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:57:15,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:57:15,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:57:15,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:57:15,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:57:15,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:57:15,084 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:57:15,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:57:15,085 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:57:15,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:57:15,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:57:15,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:57:15,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:57:15,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:57:15,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:57:15,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:57:15,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:57:15,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:57:15,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:57:15,087 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:57:15,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:57:15,087 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:57:15,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:57:15,087 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:57:15,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:57:15,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:57:15,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:57:15,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:57:15,404 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:57:15,405 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:57:15,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-09-01 14:57:16,458 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:57:16,657 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:57:16,658 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-09-01 14:57:16,663 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1832c6e0/8eb12dd2bede429d824069e43fd946dc/FLAGe85d518f7 [2023-09-01 14:57:16,676 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1832c6e0/8eb12dd2bede429d824069e43fd946dc [2023-09-01 14:57:16,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:57:16,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:57:16,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:57:16,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:57:16,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:57:16,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:16,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e28837c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16, skipping insertion in model container [2023-09-01 14:57:16,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:16,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:57:16,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:57:16,892 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c[2572,2585] [2023-09-01 14:57:16,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:57:16,916 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:57:16,950 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c[2572,2585] [2023-09-01 14:57:16,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:57:16,975 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:57:16,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16 WrapperNode [2023-09-01 14:57:16,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:57:16,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:57:16,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:57:16,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:57:16,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:17,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:17,032 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 157 [2023-09-01 14:57:17,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:57:17,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:57:17,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:57:17,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:57:17,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:17,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:17,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:17,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:17,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:17,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:17,077 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:17,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:17,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:57:17,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:57:17,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:57:17,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:57:17,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (1/1) ... [2023-09-01 14:57:17,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:57:17,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:17,117 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) [2023-09-01 14:57:17,145 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 [2023-09-01 14:57:17,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:57:17,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:57:17,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:57:17,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:57:17,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:57:17,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:57:17,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:57:17,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:57:17,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:57:17,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:57:17,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:57:17,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:57:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:57:17,191 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:57:17,335 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:57:17,336 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:57:17,584 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:57:17,592 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:57:17,592 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 14:57:17,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:57:17 BoogieIcfgContainer [2023-09-01 14:57:17,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:57:17,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:57:17,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:57:17,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:57:17,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:57:16" (1/3) ... [2023-09-01 14:57:17,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72980f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:57:17, skipping insertion in model container [2023-09-01 14:57:17,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:16" (2/3) ... [2023-09-01 14:57:17,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72980f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:57:17, skipping insertion in model container [2023-09-01 14:57:17,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:57:17" (3/3) ... [2023-09-01 14:57:17,617 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2023-09-01 14:57:17,639 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:57:17,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:57:17,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:57:17,647 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:57:17,763 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:57:17,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 183 transitions, 382 flow [2023-09-01 14:57:17,866 INFO L130 PetriNetUnfolder]: 16/181 cut-off events. [2023-09-01 14:57:17,866 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:57:17,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 16/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 163 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-09-01 14:57:17,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 183 transitions, 382 flow [2023-09-01 14:57:17,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 173 transitions, 358 flow [2023-09-01 14:57:17,879 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:57:17,887 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 173 transitions, 358 flow [2023-09-01 14:57:17,889 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 173 transitions, 358 flow [2023-09-01 14:57:17,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 173 transitions, 358 flow [2023-09-01 14:57:17,922 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2023-09-01 14:57:17,922 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:57:17,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 173 events. 16/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 144 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-09-01 14:57:17,926 INFO L119 LiptonReduction]: Number of co-enabled transitions 3242 [2023-09-01 14:57:22,699 INFO L134 LiptonReduction]: Checked pairs total: 3238 [2023-09-01 14:57:22,699 INFO L136 LiptonReduction]: Total number of compositions: 210 [2023-09-01 14:57:22,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:57:22,717 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;@e3951b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:57:22,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:57:22,722 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-09-01 14:57:22,723 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:57:22,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:22,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:22,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:22,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash 924236132, now seen corresponding path program 1 times [2023-09-01 14:57:22,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:22,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301193819] [2023-09-01 14:57:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:22,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:23,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301193819] [2023-09-01 14:57:23,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301193819] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:23,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:23,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:57:23,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125631706] [2023-09-01 14:57:23,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:23,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:57:23,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:23,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:57:23,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:57:23,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 393 [2023-09-01 14:57:23,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:23,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 393 [2023-09-01 14:57:23,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:23,228 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-09-01 14:57:23,229 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 14:57:23,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 189 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-09-01 14:57:23,231 INFO L137 encePairwiseOnDemand]: 390/393 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-09-01 14:57:23,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-09-01 14:57:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:57:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:57:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-09-01 14:57:23,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408821034775235 [2023-09-01 14:57:23,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-09-01 14:57:23,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-09-01 14:57:23,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:23,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-09-01 14:57:23,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,264 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 500 transitions. [2023-09-01 14:57:23,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-09-01 14:57:23,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:57:23,268 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-09-01 14:57:23,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-09-01 14:57:23,272 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-09-01 14:57:23,272 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-09-01 14:57:23,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:23,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:23,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:57:23,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:23,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:23,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1656557720, now seen corresponding path program 1 times [2023-09-01 14:57:23,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:23,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892702284] [2023-09-01 14:57:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:23,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:23,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892702284] [2023-09-01 14:57:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892702284] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:23,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:23,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 14:57:23,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594183528] [2023-09-01 14:57:23,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:23,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:57:23,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:23,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:57:23,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:57:23,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 393 [2023-09-01 14:57:23,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:23,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 393 [2023-09-01 14:57:23,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:23,574 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-09-01 14:57:23,575 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:57:23,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 317 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-09-01 14:57:23,576 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-09-01 14:57:23,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-09-01 14:57:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:57:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:57:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-09-01 14:57:23,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408821034775235 [2023-09-01 14:57:23,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-09-01 14:57:23,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-09-01 14:57:23,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:23,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-09-01 14:57:23,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,584 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 500 transitions. [2023-09-01 14:57:23,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-09-01 14:57:23,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 14:57:23,586 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-09-01 14:57:23,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-09-01 14:57:23,586 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-09-01 14:57:23,587 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-09-01 14:57:23,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:23,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:23,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:57:23,588 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:23,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:23,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1844840923, now seen corresponding path program 1 times [2023-09-01 14:57:23,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:23,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047187027] [2023-09-01 14:57:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:23,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:23,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:23,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047187027] [2023-09-01 14:57:23,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047187027] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:23,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:23,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:57:23,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889125048] [2023-09-01 14:57:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:23,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:57:23,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:57:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:57:23,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 393 [2023-09-01 14:57:23,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:23,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 393 [2023-09-01 14:57:23,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:23,807 INFO L130 PetriNetUnfolder]: 74/143 cut-off events. [2023-09-01 14:57:23,807 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-09-01 14:57:23,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 143 events. 74/143 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 469 event pairs, 15 based on Foata normal form. 8/150 useless extension candidates. Maximal degree in co-relation 330. Up to 83 conditions per place. [2023-09-01 14:57:23,808 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 29 selfloop transitions, 4 changer transitions 2/36 dead transitions. [2023-09-01 14:57:23,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 36 transitions, 180 flow [2023-09-01 14:57:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:57:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:57:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 664 transitions. [2023-09-01 14:57:23,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223918575063613 [2023-09-01 14:57:23,811 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 664 transitions. [2023-09-01 14:57:23,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 664 transitions. [2023-09-01 14:57:23,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:23,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 664 transitions. [2023-09-01 14:57:23,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,817 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,817 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 4 states and 664 transitions. [2023-09-01 14:57:23,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 36 transitions, 180 flow [2023-09-01 14:57:23,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 36 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:57:23,819 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 89 flow [2023-09-01 14:57:23,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-09-01 14:57:23,820 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-09-01 14:57:23,820 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 89 flow [2023-09-01 14:57:23,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:23,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:23,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:57:23,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:23,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:23,822 INFO L85 PathProgramCache]: Analyzing trace with hash -338318067, now seen corresponding path program 1 times [2023-09-01 14:57:23,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:23,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107331330] [2023-09-01 14:57:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:23,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:23,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:23,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107331330] [2023-09-01 14:57:23,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107331330] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:23,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:23,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:57:23,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118027878] [2023-09-01 14:57:23,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:23,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:57:23,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:57:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:57:23,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 393 [2023-09-01 14:57:23,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 155.2) internal successors, (776), 5 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:23,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:23,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 393 [2023-09-01 14:57:23,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:24,068 INFO L130 PetriNetUnfolder]: 93/182 cut-off events. [2023-09-01 14:57:24,069 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-09-01 14:57:24,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 182 events. 93/182 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 615 event pairs, 26 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 506. Up to 89 conditions per place. [2023-09-01 14:57:24,071 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 31 selfloop transitions, 7 changer transitions 11/49 dead transitions. [2023-09-01 14:57:24,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 49 transitions, 274 flow [2023-09-01 14:57:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:57:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:57:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 958 transitions. [2023-09-01 14:57:24,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40627650551314676 [2023-09-01 14:57:24,074 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 958 transitions. [2023-09-01 14:57:24,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 958 transitions. [2023-09-01 14:57:24,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:24,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 958 transitions. [2023-09-01 14:57:24,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.66666666666666) internal successors, (958), 6 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:24,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 393.0) internal successors, (2751), 7 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:24,082 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 393.0) internal successors, (2751), 7 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:24,082 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 89 flow. Second operand 6 states and 958 transitions. [2023-09-01 14:57:24,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 49 transitions, 274 flow [2023-09-01 14:57:24,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 264 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 14:57:24,085 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 126 flow [2023-09-01 14:57:24,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-09-01 14:57:24,085 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2023-09-01 14:57:24,086 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 126 flow [2023-09-01 14:57:24,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.2) internal successors, (776), 5 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:24,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:24,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:24,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 14:57:24,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:24,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:24,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1252150367, now seen corresponding path program 2 times [2023-09-01 14:57:24,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:24,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69633902] [2023-09-01 14:57:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:24,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:24,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:24,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69633902] [2023-09-01 14:57:24,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69633902] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:24,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768596033] [2023-09-01 14:57:24,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:57:24,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:24,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:24,201 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) [2023-09-01 14:57:24,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:57:24,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:57:24,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:24,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:57:24,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:24,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:24,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768596033] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:24,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:57:24,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 7 [2023-09-01 14:57:24,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212658574] [2023-09-01 14:57:24,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:24,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:57:24,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:57:24,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:57:24,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 393 [2023-09-01 14:57:24,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:24,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:24,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 393 [2023-09-01 14:57:24,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:24,593 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-09-01 14:57:24,593 INFO L131 PetriNetUnfolder]: For 248/261 co-relation queries the response was YES. [2023-09-01 14:57:24,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 163 events. 85/163 cut-off events. For 248/261 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 501 event pairs, 16 based on Foata normal form. 19/179 useless extension candidates. Maximal degree in co-relation 561. Up to 106 conditions per place. [2023-09-01 14:57:24,595 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 29 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-09-01 14:57:24,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 262 flow [2023-09-01 14:57:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:57:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:57:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 654 transitions. [2023-09-01 14:57:24,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41603053435114506 [2023-09-01 14:57:24,597 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 654 transitions. [2023-09-01 14:57:24,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 654 transitions. [2023-09-01 14:57:24,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:24,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 654 transitions. [2023-09-01 14:57:24,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:24,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:24,603 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:24,603 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 126 flow. Second operand 4 states and 654 transitions. [2023-09-01 14:57:24,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 262 flow [2023-09-01 14:57:24,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 248 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 14:57:24,605 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 151 flow [2023-09-01 14:57:24,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-09-01 14:57:24,606 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-09-01 14:57:24,606 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 151 flow [2023-09-01 14:57:24,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:24,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:24,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:24,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:57:24,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:24,813 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:24,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash 906879297, now seen corresponding path program 3 times [2023-09-01 14:57:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:24,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438134451] [2023-09-01 14:57:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:24,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:24,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:24,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438134451] [2023-09-01 14:57:24,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438134451] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:24,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:24,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:57:24,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718760156] [2023-09-01 14:57:24,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:24,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:57:24,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:57:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:57:24,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 393 [2023-09-01 14:57:24,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:24,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:24,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 393 [2023-09-01 14:57:24,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:25,052 INFO L130 PetriNetUnfolder]: 102/207 cut-off events. [2023-09-01 14:57:25,053 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2023-09-01 14:57:25,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 207 events. 102/207 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 714 event pairs, 36 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 737. Up to 129 conditions per place. [2023-09-01 14:57:25,055 INFO L137 encePairwiseOnDemand]: 388/393 looper letters, 34 selfloop transitions, 8 changer transitions 8/50 dead transitions. [2023-09-01 14:57:25,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 355 flow [2023-09-01 14:57:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:57:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:57:25,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 804 transitions. [2023-09-01 14:57:25,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40916030534351144 [2023-09-01 14:57:25,058 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 804 transitions. [2023-09-01 14:57:25,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 804 transitions. [2023-09-01 14:57:25,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:25,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 804 transitions. [2023-09-01 14:57:25,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 393.0) internal successors, (2358), 6 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,064 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 393.0) internal successors, (2358), 6 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,064 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 151 flow. Second operand 5 states and 804 transitions. [2023-09-01 14:57:25,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 355 flow [2023-09-01 14:57:25,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 346 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 14:57:25,067 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 194 flow [2023-09-01 14:57:25,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2023-09-01 14:57:25,068 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-09-01 14:57:25,068 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 194 flow [2023-09-01 14:57:25,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:25,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:25,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 14:57:25,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:25,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:25,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1096563895, now seen corresponding path program 2 times [2023-09-01 14:57:25,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:25,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341258455] [2023-09-01 14:57:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:25,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:25,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:25,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341258455] [2023-09-01 14:57:25,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341258455] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:25,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:25,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:57:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515095844] [2023-09-01 14:57:25,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:25,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:57:25,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:57:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:57:25,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 393 [2023-09-01 14:57:25,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:25,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 393 [2023-09-01 14:57:25,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:25,250 INFO L130 PetriNetUnfolder]: 96/192 cut-off events. [2023-09-01 14:57:25,250 INFO L131 PetriNetUnfolder]: For 597/607 co-relation queries the response was YES. [2023-09-01 14:57:25,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 192 events. 96/192 cut-off events. For 597/607 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 643 event pairs, 31 based on Foata normal form. 13/199 useless extension candidates. Maximal degree in co-relation 800. Up to 130 conditions per place. [2023-09-01 14:57:25,252 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 28 selfloop transitions, 6 changer transitions 5/42 dead transitions. [2023-09-01 14:57:25,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 338 flow [2023-09-01 14:57:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:57:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:57:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 664 transitions. [2023-09-01 14:57:25,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223918575063613 [2023-09-01 14:57:25,254 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 664 transitions. [2023-09-01 14:57:25,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 664 transitions. [2023-09-01 14:57:25,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:25,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 664 transitions. [2023-09-01 14:57:25,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,258 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,259 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 194 flow. Second operand 4 states and 664 transitions. [2023-09-01 14:57:25,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 338 flow [2023-09-01 14:57:25,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 313 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-09-01 14:57:25,261 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 213 flow [2023-09-01 14:57:25,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-09-01 14:57:25,262 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-09-01 14:57:25,262 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 213 flow [2023-09-01 14:57:25,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:25,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:25,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 14:57:25,263 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:25,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1118128293, now seen corresponding path program 4 times [2023-09-01 14:57:25,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:25,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78547453] [2023-09-01 14:57:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:25,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:25,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78547453] [2023-09-01 14:57:25,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78547453] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:25,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160269913] [2023-09-01 14:57:25,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:57:25,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:25,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:25,355 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) [2023-09-01 14:57:25,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:57:25,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:57:25,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:25,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:57:25,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:25,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:25,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160269913] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:25,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:25,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-09-01 14:57:25,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306292532] [2023-09-01 14:57:25,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:25,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 14:57:25,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 14:57:25,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-09-01 14:57:25,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 393 [2023-09-01 14:57:25,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 213 flow. Second operand has 10 states, 10 states have (on average 154.8) internal successors, (1548), 10 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:25,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 393 [2023-09-01 14:57:25,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:25,901 INFO L130 PetriNetUnfolder]: 125/231 cut-off events. [2023-09-01 14:57:25,901 INFO L131 PetriNetUnfolder]: For 749/749 co-relation queries the response was YES. [2023-09-01 14:57:25,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 231 events. 125/231 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 767 event pairs, 20 based on Foata normal form. 24/254 useless extension candidates. Maximal degree in co-relation 956. Up to 92 conditions per place. [2023-09-01 14:57:25,903 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 39 selfloop transitions, 25 changer transitions 9/73 dead transitions. [2023-09-01 14:57:25,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 582 flow [2023-09-01 14:57:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 14:57:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 14:57:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1436 transitions. [2023-09-01 14:57:25,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059937800395816 [2023-09-01 14:57:25,907 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1436 transitions. [2023-09-01 14:57:25,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1436 transitions. [2023-09-01 14:57:25,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:25,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1436 transitions. [2023-09-01 14:57:25,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 159.55555555555554) internal successors, (1436), 9 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 393.0) internal successors, (3930), 10 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,916 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 393.0) internal successors, (3930), 10 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,917 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 213 flow. Second operand 9 states and 1436 transitions. [2023-09-01 14:57:25,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 582 flow [2023-09-01 14:57:25,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 560 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-09-01 14:57:25,921 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 373 flow [2023-09-01 14:57:25,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-09-01 14:57:25,923 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2023-09-01 14:57:25,924 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 373 flow [2023-09-01 14:57:25,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.8) internal successors, (1548), 10 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:25,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:25,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 14:57:26,130 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 [2023-09-01 14:57:26,130 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:26,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:26,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1249714855, now seen corresponding path program 1 times [2023-09-01 14:57:26,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:26,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979440321] [2023-09-01 14:57:26,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:26,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:26,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:26,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979440321] [2023-09-01 14:57:26,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979440321] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:26,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988996668] [2023-09-01 14:57:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:26,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:26,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:26,275 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) [2023-09-01 14:57:26,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:57:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:26,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 14:57:26,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:26,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 14:57:26,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:57:26,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:57:26,685 INFO L321 Elim1Store]: treesize reduction 37, result has 64.8 percent of original size [2023-09-01 14:57:26,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 101 [2023-09-01 14:57:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:26,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:27,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:27,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 176 [2023-09-01 14:57:27,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:27,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 852 treesize of output 804 [2023-09-01 14:57:27,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:27,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 228 [2023-09-01 14:57:27,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:27,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 259 treesize of output 225 [2023-09-01 14:57:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:32,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988996668] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:32,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:32,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-09-01 14:57:32,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114126483] [2023-09-01 14:57:32,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:32,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 14:57:32,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 14:57:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=186, Unknown=4, NotChecked=0, Total=240 [2023-09-01 14:57:34,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:36,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:38,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:40,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:42,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:44,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:46,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:48,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:51,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:54,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:55,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:57,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:59,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:58:01,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:58:03,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:58:03,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 393 [2023-09-01 14:58:03,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 373 flow. Second operand has 16 states, 16 states have (on average 107.75) internal successors, (1724), 16 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:03,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:58:03,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 393 [2023-09-01 14:58:03,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:58:04,932 INFO L130 PetriNetUnfolder]: 275/487 cut-off events. [2023-09-01 14:58:04,932 INFO L131 PetriNetUnfolder]: For 1576/1596 co-relation queries the response was YES. [2023-09-01 14:58:04,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 487 events. 275/487 cut-off events. For 1576/1596 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1896 event pairs, 8 based on Foata normal form. 38/517 useless extension candidates. Maximal degree in co-relation 1976. Up to 249 conditions per place. [2023-09-01 14:58:04,936 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 75 selfloop transitions, 35 changer transitions 43/157 dead transitions. [2023-09-01 14:58:04,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 157 transitions, 1394 flow [2023-09-01 14:58:04,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 14:58:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 14:58:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2540 transitions. [2023-09-01 14:58:04,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2810045358999889 [2023-09-01 14:58:04,946 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2540 transitions. [2023-09-01 14:58:04,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2540 transitions. [2023-09-01 14:58:04,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:58:04,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2540 transitions. [2023-09-01 14:58:04,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 110.43478260869566) internal successors, (2540), 23 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:04,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:04,966 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:04,966 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 373 flow. Second operand 23 states and 2540 transitions. [2023-09-01 14:58:04,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 157 transitions, 1394 flow [2023-09-01 14:58:04,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 157 transitions, 1201 flow, removed 74 selfloop flow, removed 5 redundant places. [2023-09-01 14:58:04,974 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 573 flow [2023-09-01 14:58:04,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=573, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-09-01 14:58:04,976 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-09-01 14:58:04,976 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 573 flow [2023-09-01 14:58:04,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.75) internal successors, (1724), 16 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:04,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:58:04,977 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:58:04,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:58:05,183 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 [2023-09-01 14:58:05,183 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:58:05,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:58:05,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1302241712, now seen corresponding path program 2 times [2023-09-01 14:58:05,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:58:05,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528775974] [2023-09-01 14:58:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:58:05,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:58:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:58:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:58:05,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:58:05,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528775974] [2023-09-01 14:58:05,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528775974] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:58:05,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125110718] [2023-09-01 14:58:05,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:58:05,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:58:05,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:58:05,356 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) [2023-09-01 14:58:05,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:58:05,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:58:05,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:58:05,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 14:58:05,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:58:05,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 14:58:05,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:58:05,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:58:05,766 INFO L321 Elim1Store]: treesize reduction 41, result has 61.0 percent of original size [2023-09-01 14:58:05,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 97 [2023-09-01 14:58:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:58:06,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:58:06,351 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_216 (Array Int Int)) (~x1~0 Int) (~x2~0 Int)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) c_~f~0.base))) (let ((.cse1 (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* ~x2~0 4))) 4))) 4))))) (or (= (select .cse0 (+ (* ~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* .cse1 4)))) (<= c_~size~0 .cse1) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (< .cse1 0))))) is different from false [2023-09-01 14:58:06,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:06,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 176 [2023-09-01 14:58:06,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:06,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 852 treesize of output 804 [2023-09-01 14:58:06,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:06,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 228 [2023-09-01 14:58:06,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:06,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 259 treesize of output 225 [2023-09-01 14:58:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:58:10,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125110718] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:58:10,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:58:10,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 14:58:10,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877034489] [2023-09-01 14:58:10,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:58:10,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 14:58:10,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:58:10,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 14:58:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=193, Unknown=1, NotChecked=28, Total=272 [2023-09-01 14:58:10,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 393 [2023-09-01 14:58:10,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 573 flow. Second operand has 17 states, 17 states have (on average 107.88235294117646) internal successors, (1834), 17 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:10,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:58:10,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 393 [2023-09-01 14:58:10,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:58:11,224 INFO L130 PetriNetUnfolder]: 225/419 cut-off events. [2023-09-01 14:58:11,225 INFO L131 PetriNetUnfolder]: For 1945/1964 co-relation queries the response was YES. [2023-09-01 14:58:11,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 419 events. 225/419 cut-off events. For 1945/1964 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1645 event pairs, 4 based on Foata normal form. 43/460 useless extension candidates. Maximal degree in co-relation 2208. Up to 141 conditions per place. [2023-09-01 14:58:11,228 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 53 selfloop transitions, 24 changer transitions 55/136 dead transitions. [2023-09-01 14:58:11,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 136 transitions, 1265 flow [2023-09-01 14:58:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 14:58:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 14:58:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2094 transitions. [2023-09-01 14:58:11,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2804339092004821 [2023-09-01 14:58:11,235 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2094 transitions. [2023-09-01 14:58:11,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2094 transitions. [2023-09-01 14:58:11,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:58:11,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2094 transitions. [2023-09-01 14:58:11,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 110.21052631578948) internal successors, (2094), 19 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:11,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 393.0) internal successors, (7860), 20 states have internal predecessors, (7860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:11,250 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 393.0) internal successors, (7860), 20 states have internal predecessors, (7860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:11,250 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 573 flow. Second operand 19 states and 2094 transitions. [2023-09-01 14:58:11,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 136 transitions, 1265 flow [2023-09-01 14:58:11,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 1158 flow, removed 39 selfloop flow, removed 7 redundant places. [2023-09-01 14:58:11,260 INFO L231 Difference]: Finished difference. Result has 84 places, 49 transitions, 471 flow [2023-09-01 14:58:11,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=471, PETRI_PLACES=84, PETRI_TRANSITIONS=49} [2023-09-01 14:58:11,261 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 63 predicate places. [2023-09-01 14:58:11,261 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 49 transitions, 471 flow [2023-09-01 14:58:11,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 107.88235294117646) internal successors, (1834), 17 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:11,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:58:11,262 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:58:11,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:58:11,470 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 [2023-09-01 14:58:11,471 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:58:11,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:58:11,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1189533459, now seen corresponding path program 3 times [2023-09-01 14:58:11,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:58:11,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312078308] [2023-09-01 14:58:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:58:11,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:58:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:58:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:58:14,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:58:14,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312078308] [2023-09-01 14:58:14,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312078308] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:58:14,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729596194] [2023-09-01 14:58:14,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:58:14,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:58:14,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:58:14,343 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) [2023-09-01 14:58:14,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:58:14,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 14:58:14,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:58:14,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 14:58:14,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:58:14,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 14:58:14,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:58:14,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:58:15,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:15,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2023-09-01 14:58:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:58:15,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:58:17,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:17,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 374 treesize of output 218 [2023-09-01 14:58:18,108 INFO L321 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2023-09-01 14:58:18,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 488 treesize of output 691 [2023-09-01 14:58:18,582 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-09-01 14:58:18,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 376 treesize of output 520 [2023-09-01 14:58:19,117 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-09-01 14:58:19,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 373 [2023-09-01 14:58:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:58:40,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729596194] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:58:40,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:58:40,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-09-01 14:58:40,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960159321] [2023-09-01 14:58:40,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:58:40,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 14:58:40,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:58:40,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 14:58:40,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=744, Unknown=6, NotChecked=0, Total=870 [2023-09-01 14:58:41,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-09-01 14:58:41,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 49 transitions, 471 flow. Second operand has 30 states, 30 states have (on average 116.5) internal successors, (3495), 30 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:41,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:58:41,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-09-01 14:58:41,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:58:47,933 WARN L222 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 96 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:58:49,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:58:51,889 INFO L130 PetriNetUnfolder]: 501/889 cut-off events. [2023-09-01 14:58:51,889 INFO L131 PetriNetUnfolder]: For 3648/3688 co-relation queries the response was YES. [2023-09-01 14:58:51,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4649 conditions, 889 events. 501/889 cut-off events. For 3648/3688 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3794 event pairs, 30 based on Foata normal form. 40/919 useless extension candidates. Maximal degree in co-relation 4596. Up to 356 conditions per place. [2023-09-01 14:58:51,897 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 125 selfloop transitions, 75 changer transitions 13/220 dead transitions. [2023-09-01 14:58:51,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 220 transitions, 2194 flow [2023-09-01 14:58:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 14:58:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 14:58:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2922 transitions. [2023-09-01 14:58:51,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3097964376590331 [2023-09-01 14:58:51,906 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2922 transitions. [2023-09-01 14:58:51,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2922 transitions. [2023-09-01 14:58:51,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:58:51,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2922 transitions. [2023-09-01 14:58:51,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 121.75) internal successors, (2922), 24 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:51,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:51,928 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:51,928 INFO L175 Difference]: Start difference. First operand has 84 places, 49 transitions, 471 flow. Second operand 24 states and 2922 transitions. [2023-09-01 14:58:51,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 220 transitions, 2194 flow [2023-09-01 14:58:51,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 220 transitions, 1859 flow, removed 101 selfloop flow, removed 16 redundant places. [2023-09-01 14:58:51,942 INFO L231 Difference]: Finished difference. Result has 86 places, 120 transitions, 1292 flow [2023-09-01 14:58:51,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1292, PETRI_PLACES=86, PETRI_TRANSITIONS=120} [2023-09-01 14:58:51,943 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-09-01 14:58:51,943 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 120 transitions, 1292 flow [2023-09-01 14:58:51,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 116.5) internal successors, (3495), 30 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:51,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:58:51,944 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:58:51,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:58:52,154 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 [2023-09-01 14:58:52,154 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:58:52,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:58:52,154 INFO L85 PathProgramCache]: Analyzing trace with hash -948692765, now seen corresponding path program 4 times [2023-09-01 14:58:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:58:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508795617] [2023-09-01 14:58:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:58:52,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:58:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:58:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:58:55,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:58:55,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508795617] [2023-09-01 14:58:55,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508795617] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:58:55,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876289100] [2023-09-01 14:58:55,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:58:55,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:58:55,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:58:55,699 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) [2023-09-01 14:58:55,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:58:55,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:58:55,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:58:55,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 14:58:55,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:58:56,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:56,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-09-01 14:58:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:58:56,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:58:56,519 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-09-01 14:58:56,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-09-01 14:58:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:58:57,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876289100] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:58:57,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:58:57,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 21 [2023-09-01 14:58:57,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321889147] [2023-09-01 14:58:57,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:58:57,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:58:57,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:58:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:58:57,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:58:59,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 393 [2023-09-01 14:58:59,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 120 transitions, 1292 flow. Second operand has 23 states, 23 states have (on average 141.91304347826087) internal successors, (3264), 23 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:59,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:58:59,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 393 [2023-09-01 14:58:59,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:01,445 INFO L130 PetriNetUnfolder]: 909/1626 cut-off events. [2023-09-01 14:59:01,445 INFO L131 PetriNetUnfolder]: For 6238/6288 co-relation queries the response was YES. [2023-09-01 14:59:01,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8266 conditions, 1626 events. 909/1626 cut-off events. For 6238/6288 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8215 event pairs, 146 based on Foata normal form. 46/1658 useless extension candidates. Maximal degree in co-relation 7649. Up to 856 conditions per place. [2023-09-01 14:59:01,459 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 159 selfloop transitions, 113 changer transitions 7/286 dead transitions. [2023-09-01 14:59:01,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 286 transitions, 3146 flow [2023-09-01 14:59:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 14:59:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 14:59:01,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3368 transitions. [2023-09-01 14:59:01,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37260758933510346 [2023-09-01 14:59:01,466 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3368 transitions. [2023-09-01 14:59:01,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3368 transitions. [2023-09-01 14:59:01,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:01,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3368 transitions. [2023-09-01 14:59:01,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 146.43478260869566) internal successors, (3368), 23 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:01,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:01,484 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:01,484 INFO L175 Difference]: Start difference. First operand has 86 places, 120 transitions, 1292 flow. Second operand 23 states and 3368 transitions. [2023-09-01 14:59:01,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 286 transitions, 3146 flow [2023-09-01 14:59:01,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 286 transitions, 2902 flow, removed 120 selfloop flow, removed 2 redundant places. [2023-09-01 14:59:01,511 INFO L231 Difference]: Finished difference. Result has 111 places, 204 transitions, 2299 flow [2023-09-01 14:59:01,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2299, PETRI_PLACES=111, PETRI_TRANSITIONS=204} [2023-09-01 14:59:01,512 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2023-09-01 14:59:01,512 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 204 transitions, 2299 flow [2023-09-01 14:59:01,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 141.91304347826087) internal successors, (3264), 23 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:01,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:01,514 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:01,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 14:59:01,720 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 [2023-09-01 14:59:01,720 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:01,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:01,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1651791961, now seen corresponding path program 5 times [2023-09-01 14:59:01,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:01,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665196103] [2023-09-01 14:59:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:01,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:59:04,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:04,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665196103] [2023-09-01 14:59:04,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665196103] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:04,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432257450] [2023-09-01 14:59:04,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:59:04,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:04,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:04,384 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) [2023-09-01 14:59:04,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:59:04,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 14:59:04,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:04,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 14:59:04,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:04,722 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:59:04,808 INFO L321 Elim1Store]: treesize reduction 169, result has 27.2 percent of original size [2023-09-01 14:59:04,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 99 [2023-09-01 14:59:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:04,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:05,299 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-09-01 14:59:05,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-09-01 14:59:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:06,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432257450] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:06,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:06,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-09-01 14:59:06,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920244739] [2023-09-01 14:59:06,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:06,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 14:59:06,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 14:59:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-09-01 14:59:08,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 393 [2023-09-01 14:59:08,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 204 transitions, 2299 flow. Second operand has 24 states, 24 states have (on average 142.91666666666666) internal successors, (3430), 24 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:08,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:08,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 393 [2023-09-01 14:59:08,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:10,975 INFO L130 PetriNetUnfolder]: 1453/2617 cut-off events. [2023-09-01 14:59:10,975 INFO L131 PetriNetUnfolder]: For 11165/11209 co-relation queries the response was YES. [2023-09-01 14:59:10,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13312 conditions, 2617 events. 1453/2617 cut-off events. For 11165/11209 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15181 event pairs, 242 based on Foata normal form. 39/2644 useless extension candidates. Maximal degree in co-relation 12505. Up to 1581 conditions per place. [2023-09-01 14:59:10,998 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 209 selfloop transitions, 137 changer transitions 5/358 dead transitions. [2023-09-01 14:59:10,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 358 transitions, 4361 flow [2023-09-01 14:59:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 14:59:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 14:59:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3528 transitions. [2023-09-01 14:59:11,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37404580152671757 [2023-09-01 14:59:11,004 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3528 transitions. [2023-09-01 14:59:11,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3528 transitions. [2023-09-01 14:59:11,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:11,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3528 transitions. [2023-09-01 14:59:11,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 147.0) internal successors, (3528), 24 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:11,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:11,020 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:11,020 INFO L175 Difference]: Start difference. First operand has 111 places, 204 transitions, 2299 flow. Second operand 24 states and 3528 transitions. [2023-09-01 14:59:11,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 358 transitions, 4361 flow [2023-09-01 14:59:11,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 358 transitions, 4059 flow, removed 136 selfloop flow, removed 6 redundant places. [2023-09-01 14:59:11,066 INFO L231 Difference]: Finished difference. Result has 134 places, 281 transitions, 3428 flow [2023-09-01 14:59:11,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3428, PETRI_PLACES=134, PETRI_TRANSITIONS=281} [2023-09-01 14:59:11,067 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2023-09-01 14:59:11,067 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 281 transitions, 3428 flow [2023-09-01 14:59:11,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 142.91666666666666) internal successors, (3430), 24 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:11,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:11,069 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:11,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:59:11,270 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 [2023-09-01 14:59:11,270 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:11,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:11,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1515982353, now seen corresponding path program 6 times [2023-09-01 14:59:11,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:11,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582118270] [2023-09-01 14:59:11,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:11,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:59:13,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:13,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582118270] [2023-09-01 14:59:13,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582118270] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:13,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139156025] [2023-09-01 14:59:13,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:59:13,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:13,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:13,922 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) [2023-09-01 14:59:13,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:59:14,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:59:14,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:14,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 14:59:14,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:14,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:14,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-09-01 14:59:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:14,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:14,782 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-09-01 14:59:14,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-09-01 14:59:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:59:15,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139156025] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:15,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:15,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 21 [2023-09-01 14:59:15,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572223564] [2023-09-01 14:59:15,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:15,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:59:15,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:59:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:59:18,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 393 [2023-09-01 14:59:18,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 281 transitions, 3428 flow. Second operand has 23 states, 23 states have (on average 142.91304347826087) internal successors, (3287), 23 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:18,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:18,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 393 [2023-09-01 14:59:18,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:20,344 INFO L130 PetriNetUnfolder]: 2041/3680 cut-off events. [2023-09-01 14:59:20,344 INFO L131 PetriNetUnfolder]: For 17681/17723 co-relation queries the response was YES. [2023-09-01 14:59:20,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19305 conditions, 3680 events. 2041/3680 cut-off events. For 17681/17723 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23391 event pairs, 440 based on Foata normal form. 40/3708 useless extension candidates. Maximal degree in co-relation 18042. Up to 2503 conditions per place. [2023-09-01 14:59:20,373 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 282 selfloop transitions, 153 changer transitions 9/451 dead transitions. [2023-09-01 14:59:20,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 451 transitions, 5965 flow [2023-09-01 14:59:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 14:59:20,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 14:59:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3520 transitions. [2023-09-01 14:59:20,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37319762510602206 [2023-09-01 14:59:20,379 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3520 transitions. [2023-09-01 14:59:20,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3520 transitions. [2023-09-01 14:59:20,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:20,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3520 transitions. [2023-09-01 14:59:20,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 146.66666666666666) internal successors, (3520), 24 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:20,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:20,391 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:20,391 INFO L175 Difference]: Start difference. First operand has 134 places, 281 transitions, 3428 flow. Second operand 24 states and 3520 transitions. [2023-09-01 14:59:20,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 451 transitions, 5965 flow [2023-09-01 14:59:20,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 451 transitions, 5756 flow, removed 67 selfloop flow, removed 11 redundant places. [2023-09-01 14:59:20,464 INFO L231 Difference]: Finished difference. Result has 157 places, 374 transitions, 5065 flow [2023-09-01 14:59:20,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5065, PETRI_PLACES=157, PETRI_TRANSITIONS=374} [2023-09-01 14:59:20,465 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-09-01 14:59:20,465 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 374 transitions, 5065 flow [2023-09-01 14:59:20,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 142.91304347826087) internal successors, (3287), 23 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:20,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:20,466 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:20,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 14:59:20,672 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 [2023-09-01 14:59:20,673 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:20,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:20,673 INFO L85 PathProgramCache]: Analyzing trace with hash 829672547, now seen corresponding path program 7 times [2023-09-01 14:59:20,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:20,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827170627] [2023-09-01 14:59:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:20,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:59:22,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:22,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827170627] [2023-09-01 14:59:22,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827170627] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:22,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46237500] [2023-09-01 14:59:22,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:59:22,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:22,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:22,857 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) [2023-09-01 14:59:22,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:59:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:22,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 14:59:22,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:23,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:59:23,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 14:59:23,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:23,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-09-01 14:59:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:23,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:25,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:25,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 378 [2023-09-01 14:59:25,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:25,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 49 treesize of output 256 [2023-09-01 14:59:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:29,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46237500] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:29,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:29,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-09-01 14:59:29,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713939787] [2023-09-01 14:59:29,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:29,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:59:29,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:59:29,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=617, Unknown=7, NotChecked=0, Total=702 [2023-09-01 14:59:32,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:35,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:37,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:40,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:42,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:44,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:46,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:49,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:49,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-09-01 14:59:49,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 374 transitions, 5065 flow. Second operand has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:49,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:49,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-09-01 14:59:49,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:51,648 INFO L130 PetriNetUnfolder]: 2281/4117 cut-off events. [2023-09-01 14:59:51,648 INFO L131 PetriNetUnfolder]: For 21921/21966 co-relation queries the response was YES. [2023-09-01 14:59:51,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22823 conditions, 4117 events. 2281/4117 cut-off events. For 21921/21966 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26581 event pairs, 474 based on Foata normal form. 41/4148 useless extension candidates. Maximal degree in co-relation 21160. Up to 2658 conditions per place. [2023-09-01 14:59:51,679 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 357 selfloop transitions, 139 changer transitions 5/508 dead transitions. [2023-09-01 14:59:51,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 508 transitions, 7254 flow [2023-09-01 14:59:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 14:59:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 14:59:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3133 transitions. [2023-09-01 14:59:51,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30661577608142493 [2023-09-01 14:59:51,689 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3133 transitions. [2023-09-01 14:59:51,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3133 transitions. [2023-09-01 14:59:51,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:51,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3133 transitions. [2023-09-01 14:59:51,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 120.5) internal successors, (3133), 26 states have internal predecessors, (3133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:51,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 393.0) internal successors, (10611), 27 states have internal predecessors, (10611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:51,702 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 393.0) internal successors, (10611), 27 states have internal predecessors, (10611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:51,703 INFO L175 Difference]: Start difference. First operand has 157 places, 374 transitions, 5065 flow. Second operand 26 states and 3133 transitions. [2023-09-01 14:59:51,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 508 transitions, 7254 flow [2023-09-01 14:59:51,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 508 transitions, 7052 flow, removed 68 selfloop flow, removed 10 redundant places. [2023-09-01 14:59:51,830 INFO L231 Difference]: Finished difference. Result has 175 places, 419 transitions, 5881 flow [2023-09-01 14:59:51,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5881, PETRI_PLACES=175, PETRI_TRANSITIONS=419} [2023-09-01 14:59:51,831 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2023-09-01 14:59:51,831 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 419 transitions, 5881 flow [2023-09-01 14:59:51,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:51,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:51,833 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:51,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 14:59:52,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:59:52,038 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:52,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:52,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2125766925, now seen corresponding path program 8 times [2023-09-01 14:59:52,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:52,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045968199] [2023-09-01 14:59:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:52,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:59:54,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:54,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045968199] [2023-09-01 14:59:54,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045968199] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:54,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102386543] [2023-09-01 14:59:54,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:59:54,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:54,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:54,358 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:59:54,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:59:54,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:59:54,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:54,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 14:59:54,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:54,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:59:54,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 14:59:54,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:54,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-09-01 14:59:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:54,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:54,962 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_426 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_426) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset))))) 4))) (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4))) 4) c_~f~0.offset))))) is different from false [2023-09-01 14:59:55,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:55,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 378 [2023-09-01 14:59:55,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:55,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 49 treesize of output 256 [2023-09-01 14:59:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:59,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102386543] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:59,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:59,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-09-01 14:59:59,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087921465] [2023-09-01 14:59:59,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:59,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:59:59,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:59,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:59:59,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=570, Unknown=1, NotChecked=48, Total=702 [2023-09-01 14:59:59,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-09-01 14:59:59,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 419 transitions, 5881 flow. Second operand has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:59,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:59,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-09-01 14:59:59,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:01,840 INFO L130 PetriNetUnfolder]: 2836/5125 cut-off events. [2023-09-01 15:00:01,841 INFO L131 PetriNetUnfolder]: For 33480/33527 co-relation queries the response was YES. [2023-09-01 15:00:01,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29593 conditions, 5125 events. 2836/5125 cut-off events. For 33480/33527 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 34900 event pairs, 454 based on Foata normal form. 45/5160 useless extension candidates. Maximal degree in co-relation 27940. Up to 2915 conditions per place. [2023-09-01 15:00:01,934 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 318 selfloop transitions, 264 changer transitions 2/591 dead transitions. [2023-09-01 15:00:01,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 591 transitions, 9174 flow [2023-09-01 15:00:01,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 15:00:01,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 15:00:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2785 transitions. [2023-09-01 15:00:01,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3081093041265627 [2023-09-01 15:00:01,940 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2785 transitions. [2023-09-01 15:00:01,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2785 transitions. [2023-09-01 15:00:01,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:01,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2785 transitions. [2023-09-01 15:00:01,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 121.08695652173913) internal successors, (2785), 23 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:01,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:01,953 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:01,953 INFO L175 Difference]: Start difference. First operand has 175 places, 419 transitions, 5881 flow. Second operand 23 states and 2785 transitions. [2023-09-01 15:00:01,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 591 transitions, 9174 flow [2023-09-01 15:00:02,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 591 transitions, 8720 flow, removed 200 selfloop flow, removed 9 redundant places. [2023-09-01 15:00:02,130 INFO L231 Difference]: Finished difference. Result has 192 places, 516 transitions, 7872 flow [2023-09-01 15:00:02,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7872, PETRI_PLACES=192, PETRI_TRANSITIONS=516} [2023-09-01 15:00:02,131 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2023-09-01 15:00:02,131 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 516 transitions, 7872 flow [2023-09-01 15:00:02,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:02,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:02,132 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:02,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 15:00:02,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 15:00:02,339 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:00:02,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:02,340 INFO L85 PathProgramCache]: Analyzing trace with hash -816328831, now seen corresponding path program 9 times [2023-09-01 15:00:02,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:02,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175557504] [2023-09-01 15:00:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:02,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:04,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:04,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175557504] [2023-09-01 15:00:04,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175557504] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:00:04,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319549538] [2023-09-01 15:00:04,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:00:04,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:04,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:04,350 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:00:04,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 15:00:04,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 15:00:04,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:00:04,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 15:00:04,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:00:04,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 15:00:04,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:00:04,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:00:04,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 15:00:04,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:04,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2023-09-01 15:00:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:04,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:00:05,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:05,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 527 treesize of output 299 [2023-09-01 15:00:06,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:06,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 1258 treesize of output 1580 [2023-09-01 15:00:07,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:07,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 548 treesize of output 880 [2023-09-01 15:00:07,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:07,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 487 treesize of output 573 [2023-09-01 15:00:41,566 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:03:18,032 WARN L222 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 583 DAG size of output: 633 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 15:03:23,393 WARN L222 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 530 DAG size of output: 538 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 15:03:56,692 WARN L222 SmtUtils]: Spent 10.69s on a formula simplification. DAG size of input: 581 DAG size of output: 638 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 15:04:08,084 WARN L222 SmtUtils]: Spent 10.63s on a formula simplification. DAG size of input: 576 DAG size of output: 651 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 15:04:13,990 WARN L222 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 524 DAG size of output: 550 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 15:05:59,598 WARN L222 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 423 DAG size of output: 474 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 15:06:41,071 WARN L222 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 414 DAG size of output: 482 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 15:08:29,588 WARN L222 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 555 DAG size of output: 571 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 15:10:13,983 WARN L222 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 826 DAG size of output: 906 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 15:10:27,841 WARN L222 SmtUtils]: Spent 12.66s on a formula simplification. DAG size of input: 824 DAG size of output: 898 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 15:10:34,159 WARN L222 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 707 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15