./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/chl-name-comparator-symm.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 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:59:13,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:59:13,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:59:13,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:59:13,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:59:13,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:59:13,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:59:13,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:59:13,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:59:13,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:59:13,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:59:13,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:59:13,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:59:13,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:59:13,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:59:13,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:59:13,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:59:13,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:59:13,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:59:13,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:59:13,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:59:13,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:59:13,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:59:13,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:59:13,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:59:13,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:59:13,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:59:13,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:59:13,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:59:13,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:59:13,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:59:13,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:59:13,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:59:13,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:59:13,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:59:13,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:59:13,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:59:13,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:59:13,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:59:13,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:59:13,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:59:13,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:59:13,177 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:59:13,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:59:13,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:59:13,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:59:13,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:59:13,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:59:13,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:59:13,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:59:13,181 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:59:13,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:59:13,182 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:59:13,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:59:13,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:59:13,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:59:13,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:59:13,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:59:13,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:59:13,183 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:59:13,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:59:13,183 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:59:13,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:59:13,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:59:13,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:59:13,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:59:13,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:59:13,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:59:13,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:59:13,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:59:13,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:59:13,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:59:13,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:59:13,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:59:13,186 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:59:13,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:59:13,187 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:59:13,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:59:13,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:59:13,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:59:13,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:59:13,504 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:59:13,504 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:59:13,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-30 18:59:14,672 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:59:14,857 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:59:14,858 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-30 18:59:14,863 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09c06feba/9f3a5d4a68ed4774a8440d5f22710d9b/FLAG2dba94445 [2023-08-30 18:59:14,875 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09c06feba/9f3a5d4a68ed4774a8440d5f22710d9b [2023-08-30 18:59:14,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:59:14,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:59:14,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:59:14,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:59:14,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:59:14,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:59:14" (1/1) ... [2023-08-30 18:59:14,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@667aee05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:14, skipping insertion in model container [2023-08-30 18:59:14,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:59:14" (1/1) ... [2023-08-30 18:59:14,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:59:14,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:59:15,044 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/chl-name-comparator-symm.wvr.c[3856,3869] [2023-08-30 18:59:15,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:59:15,060 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:59:15,081 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/chl-name-comparator-symm.wvr.c[3856,3869] [2023-08-30 18:59:15,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:59:15,096 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:59:15,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15 WrapperNode [2023-08-30 18:59:15,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:59:15,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:59:15,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:59:15,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:59:15,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (1/1) ... [2023-08-30 18:59:15,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (1/1) ... [2023-08-30 18:59:15,135 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 227 [2023-08-30 18:59:15,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:59:15,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:59:15,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:59:15,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:59:15,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (1/1) ... [2023-08-30 18:59:15,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (1/1) ... [2023-08-30 18:59:15,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (1/1) ... [2023-08-30 18:59:15,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (1/1) ... [2023-08-30 18:59:15,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (1/1) ... [2023-08-30 18:59:15,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (1/1) ... [2023-08-30 18:59:15,158 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (1/1) ... [2023-08-30 18:59:15,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (1/1) ... [2023-08-30 18:59:15,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:59:15,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:59:15,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:59:15,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:59:15,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (1/1) ... [2023-08-30 18:59:15,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:59:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:15,189 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) [2023-08-30 18:59:15,203 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 [2023-08-30 18:59:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:59:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:59:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:59:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:59:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 18:59:15,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 18:59:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 18:59:15,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 18:59:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:59:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:59:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:59:15,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:59:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:59:15,233 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 18:59:15,387 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:59:15,389 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:59:15,696 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:59:15,706 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:59:15,706 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 18:59:15,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:59:15 BoogieIcfgContainer [2023-08-30 18:59:15,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:59:15,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:59:15,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:59:15,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:59:15,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:59:14" (1/3) ... [2023-08-30 18:59:15,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c623ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:59:15, skipping insertion in model container [2023-08-30 18:59:15,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:15" (2/3) ... [2023-08-30 18:59:15,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c623ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:59:15, skipping insertion in model container [2023-08-30 18:59:15,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:59:15" (3/3) ... [2023-08-30 18:59:15,715 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2023-08-30 18:59:15,721 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:59:15,744 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:59:15,745 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:59:15,745 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:59:15,911 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 18:59:15,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 260 transitions, 536 flow [2023-08-30 18:59:16,086 INFO L130 PetriNetUnfolder]: 19/258 cut-off events. [2023-08-30 18:59:16,087 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:59:16,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 258 events. 19/258 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-08-30 18:59:16,098 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 260 transitions, 536 flow [2023-08-30 18:59:16,104 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 250 transitions, 512 flow [2023-08-30 18:59:16,106 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:59:16,114 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 250 transitions, 512 flow [2023-08-30 18:59:16,116 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 250 transitions, 512 flow [2023-08-30 18:59:16,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 250 transitions, 512 flow [2023-08-30 18:59:16,199 INFO L130 PetriNetUnfolder]: 19/250 cut-off events. [2023-08-30 18:59:16,199 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:59:16,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 250 events. 19/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-08-30 18:59:16,205 INFO L119 LiptonReduction]: Number of co-enabled transitions 9828 [2023-08-30 18:59:23,684 INFO L134 LiptonReduction]: Checked pairs total: 8979 [2023-08-30 18:59:23,685 INFO L136 LiptonReduction]: Total number of compositions: 302 [2023-08-30 18:59:23,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:59:23,702 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;@26458379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:59:23,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 18:59:23,707 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-30 18:59:23,707 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:59:23,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:23,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:23,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:23,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:23,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1252061878, now seen corresponding path program 1 times [2023-08-30 18:59:23,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:23,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177084105] [2023-08-30 18:59:23,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:23,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:59:24,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:24,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177084105] [2023-08-30 18:59:24,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177084105] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:24,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:24,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:59:24,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912859230] [2023-08-30 18:59:24,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:24,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:59:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:24,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:59:24,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:59:24,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-08-30 18:59:24,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:24,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:24,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-08-30 18:59:24,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:24,249 INFO L130 PetriNetUnfolder]: 41/76 cut-off events. [2023-08-30 18:59:24,249 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 18:59:24,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 76 events. 41/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-30 18:59:24,252 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-30 18:59:24,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2023-08-30 18:59:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:59:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:59:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-08-30 18:59:24,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43297746144721233 [2023-08-30 18:59:24,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-08-30 18:59:24,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-08-30 18:59:24,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:24,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-08-30 18:59:24,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:24,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:24,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:24,286 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 730 transitions. [2023-08-30 18:59:24,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2023-08-30 18:59:24,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 18:59:24,290 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-30 18:59:24,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, 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} [2023-08-30 18:59:24,294 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-30 18:59:24,295 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-30 18:59:24,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:24,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:24,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:24,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:59:24,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:24,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:24,297 INFO L85 PathProgramCache]: Analyzing trace with hash -249759115, now seen corresponding path program 1 times [2023-08-30 18:59:24,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:24,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779221832] [2023-08-30 18:59:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:24,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:59:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779221832] [2023-08-30 18:59:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779221832] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:24,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839195396] [2023-08-30 18:59:24,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:24,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:24,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:24,393 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) [2023-08-30 18:59:24,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:59:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 18:59:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:59:24,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:59:24,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839195396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:24,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:24,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:59:24,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612140456] [2023-08-30 18:59:24,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:24,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:59:24,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:24,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:59:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:59:24,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 562 [2023-08-30 18:59:24,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 238.0) internal successors, (1666), 7 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:24,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:24,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 562 [2023-08-30 18:59:24,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:24,752 INFO L130 PetriNetUnfolder]: 41/78 cut-off events. [2023-08-30 18:59:24,755 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 18:59:24,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 78 events. 41/78 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 160. Up to 76 conditions per place. [2023-08-30 18:59:24,757 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 16 selfloop transitions, 4 changer transitions 0/20 dead transitions. [2023-08-30 18:59:24,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 98 flow [2023-08-30 18:59:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1197 transitions. [2023-08-30 18:59:24,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42597864768683275 [2023-08-30 18:59:24,761 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1197 transitions. [2023-08-30 18:59:24,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1197 transitions. [2023-08-30 18:59:24,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:24,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1197 transitions. [2023-08-30 18:59:24,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 239.4) internal successors, (1197), 5 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:24,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:24,773 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:24,773 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1197 transitions. [2023-08-30 18:59:24,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 98 flow [2023-08-30 18:59:24,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 94 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:59:24,774 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 72 flow [2023-08-30 18:59:24,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-08-30 18:59:24,776 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2023-08-30 18:59:24,776 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 72 flow [2023-08-30 18:59:24,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.0) internal successors, (1666), 7 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:24,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:24,777 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:24,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 18:59:24,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:24,984 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:24,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:24,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1257923115, now seen corresponding path program 2 times [2023-08-30 18:59:24,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:24,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919204479] [2023-08-30 18:59:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:24,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:25,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:25,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919204479] [2023-08-30 18:59:25,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919204479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:25,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:25,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:25,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654612736] [2023-08-30 18:59:25,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:25,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:59:25,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:59:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:59:25,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 562 [2023-08-30 18:59:25,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 216.5) internal successors, (1299), 6 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:25,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:25,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 562 [2023-08-30 18:59:25,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:25,919 INFO L130 PetriNetUnfolder]: 57/107 cut-off events. [2023-08-30 18:59:25,920 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:59:25,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 107 events. 57/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 253 event pairs, 2 based on Foata normal form. 1/82 useless extension candidates. Maximal degree in co-relation 211. Up to 68 conditions per place. [2023-08-30 18:59:25,922 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 28 selfloop transitions, 8 changer transitions 3/39 dead transitions. [2023-08-30 18:59:25,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 192 flow [2023-08-30 18:59:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1107 transitions. [2023-08-30 18:59:25,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39395017793594306 [2023-08-30 18:59:25,926 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1107 transitions. [2023-08-30 18:59:25,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1107 transitions. [2023-08-30 18:59:25,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:25,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1107 transitions. [2023-08-30 18:59:25,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.4) internal successors, (1107), 5 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:25,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:25,935 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:25,936 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 72 flow. Second operand 5 states and 1107 transitions. [2023-08-30 18:59:25,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 192 flow [2023-08-30 18:59:25,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 182 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 18:59:25,938 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 119 flow [2023-08-30 18:59:25,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-30 18:59:25,940 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-30 18:59:25,940 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 119 flow [2023-08-30 18:59:25,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 216.5) internal successors, (1299), 6 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:25,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:25,941 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:25,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 18:59:25,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:25,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:25,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1542692659, now seen corresponding path program 3 times [2023-08-30 18:59:25,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:25,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839812187] [2023-08-30 18:59:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:25,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:26,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:26,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839812187] [2023-08-30 18:59:26,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839812187] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:26,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:26,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:26,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53992932] [2023-08-30 18:59:26,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:26,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:59:26,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:26,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:59:26,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:59:26,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 562 [2023-08-30 18:59:26,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 216.5) internal successors, (1299), 6 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:26,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:26,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 562 [2023-08-30 18:59:26,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:26,657 INFO L130 PetriNetUnfolder]: 73/136 cut-off events. [2023-08-30 18:59:26,657 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-08-30 18:59:26,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 136 events. 73/136 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 338 event pairs, 8 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 384. Up to 89 conditions per place. [2023-08-30 18:59:26,658 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 34 selfloop transitions, 9 changer transitions 1/44 dead transitions. [2023-08-30 18:59:26,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 263 flow [2023-08-30 18:59:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1105 transitions. [2023-08-30 18:59:26,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932384341637011 [2023-08-30 18:59:26,662 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1105 transitions. [2023-08-30 18:59:26,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1105 transitions. [2023-08-30 18:59:26,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:26,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1105 transitions. [2023-08-30 18:59:26,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:26,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:26,672 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:26,673 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 119 flow. Second operand 5 states and 1105 transitions. [2023-08-30 18:59:26,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 263 flow [2023-08-30 18:59:26,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 259 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:59:26,675 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 190 flow [2023-08-30 18:59:26,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-08-30 18:59:26,676 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-08-30 18:59:26,676 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 190 flow [2023-08-30 18:59:26,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 216.5) internal successors, (1299), 6 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:26,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:26,677 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:26,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 18:59:26,678 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:26,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:26,678 INFO L85 PathProgramCache]: Analyzing trace with hash 916610877, now seen corresponding path program 4 times [2023-08-30 18:59:26,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:26,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302513489] [2023-08-30 18:59:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:27,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:27,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302513489] [2023-08-30 18:59:27,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302513489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:27,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:27,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:27,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239330512] [2023-08-30 18:59:27,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:27,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:59:27,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:27,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:59:27,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:59:27,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 562 [2023-08-30 18:59:27,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 190 flow. Second operand has 6 states, 6 states have (on average 213.5) internal successors, (1281), 6 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:27,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:27,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 562 [2023-08-30 18:59:27,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:27,511 INFO L130 PetriNetUnfolder]: 135/258 cut-off events. [2023-08-30 18:59:27,511 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2023-08-30 18:59:27,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 258 events. 135/258 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 915 event pairs, 22 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 877. Up to 120 conditions per place. [2023-08-30 18:59:27,513 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 50 selfloop transitions, 8 changer transitions 8/66 dead transitions. [2023-08-30 18:59:27,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 466 flow [2023-08-30 18:59:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1100 transitions. [2023-08-30 18:59:27,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914590747330961 [2023-08-30 18:59:27,517 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1100 transitions. [2023-08-30 18:59:27,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1100 transitions. [2023-08-30 18:59:27,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:27,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1100 transitions. [2023-08-30 18:59:27,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.0) internal successors, (1100), 5 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:27,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:27,525 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:27,525 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 190 flow. Second operand 5 states and 1100 transitions. [2023-08-30 18:59:27,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 466 flow [2023-08-30 18:59:27,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 66 transitions, 449 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-30 18:59:27,529 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 249 flow [2023-08-30 18:59:27,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-08-30 18:59:27,530 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-30 18:59:27,530 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 249 flow [2023-08-30 18:59:27,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 213.5) internal successors, (1281), 6 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:27,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:27,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:27,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 18:59:27,531 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:27,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:27,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1558748101, now seen corresponding path program 5 times [2023-08-30 18:59:27,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:27,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419217040] [2023-08-30 18:59:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:27,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:27,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:27,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419217040] [2023-08-30 18:59:27,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419217040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:27,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:27,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:27,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542556707] [2023-08-30 18:59:27,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:27,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:59:27,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:27,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:59:27,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:59:27,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 562 [2023-08-30 18:59:27,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 214.5) internal successors, (1287), 6 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:27,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:27,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 562 [2023-08-30 18:59:27,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:28,170 INFO L130 PetriNetUnfolder]: 131/254 cut-off events. [2023-08-30 18:59:28,171 INFO L131 PetriNetUnfolder]: For 450/450 co-relation queries the response was YES. [2023-08-30 18:59:28,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 254 events. 131/254 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 918 event pairs, 14 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 962. Up to 138 conditions per place. [2023-08-30 18:59:28,173 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 46 selfloop transitions, 12 changer transitions 1/59 dead transitions. [2023-08-30 18:59:28,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 463 flow [2023-08-30 18:59:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1099 transitions. [2023-08-30 18:59:28,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911032028469751 [2023-08-30 18:59:28,177 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1099 transitions. [2023-08-30 18:59:28,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1099 transitions. [2023-08-30 18:59:28,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:28,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1099 transitions. [2023-08-30 18:59:28,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.8) internal successors, (1099), 5 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,187 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,187 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 249 flow. Second operand 5 states and 1099 transitions. [2023-08-30 18:59:28,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 463 flow [2023-08-30 18:59:28,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 451 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:59:28,193 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 321 flow [2023-08-30 18:59:28,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-30 18:59:28,196 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2023-08-30 18:59:28,196 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 321 flow [2023-08-30 18:59:28,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.5) internal successors, (1287), 6 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:28,198 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:28,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 18:59:28,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:28,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:28,199 INFO L85 PathProgramCache]: Analyzing trace with hash 441881161, now seen corresponding path program 6 times [2023-08-30 18:59:28,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:28,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692870911] [2023-08-30 18:59:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:28,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:28,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692870911] [2023-08-30 18:59:28,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692870911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:28,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:28,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:28,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361816640] [2023-08-30 18:59:28,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:28,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:59:28,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:59:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:59:28,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 562 [2023-08-30 18:59:28,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 321 flow. Second operand has 6 states, 6 states have (on average 214.5) internal successors, (1287), 6 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:28,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 562 [2023-08-30 18:59:28,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:28,981 INFO L130 PetriNetUnfolder]: 188/375 cut-off events. [2023-08-30 18:59:28,981 INFO L131 PetriNetUnfolder]: For 956/956 co-relation queries the response was YES. [2023-08-30 18:59:28,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 375 events. 188/375 cut-off events. For 956/956 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1607 event pairs, 48 based on Foata normal form. 2/323 useless extension candidates. Maximal degree in co-relation 1592. Up to 219 conditions per place. [2023-08-30 18:59:28,984 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 57 selfloop transitions, 14 changer transitions 5/76 dead transitions. [2023-08-30 18:59:28,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 695 flow [2023-08-30 18:59:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1103 transitions. [2023-08-30 18:59:28,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925266903914591 [2023-08-30 18:59:28,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1103 transitions. [2023-08-30 18:59:28,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1103 transitions. [2023-08-30 18:59:28,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:28,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1103 transitions. [2023-08-30 18:59:28,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.6) internal successors, (1103), 5 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,996 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,996 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 321 flow. Second operand 5 states and 1103 transitions. [2023-08-30 18:59:28,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 695 flow [2023-08-30 18:59:28,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 664 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-30 18:59:29,000 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 462 flow [2023-08-30 18:59:29,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=462, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-30 18:59:29,002 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-08-30 18:59:29,002 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 462 flow [2023-08-30 18:59:29,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.5) internal successors, (1287), 6 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:29,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:29,003 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:29,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 18:59:29,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:29,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash 188433506, now seen corresponding path program 1 times [2023-08-30 18:59:29,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:29,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764385407] [2023-08-30 18:59:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:29,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:29,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:29,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764385407] [2023-08-30 18:59:29,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764385407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:29,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924011460] [2023-08-30 18:59:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:29,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:29,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:29,188 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) [2023-08-30 18:59:29,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:59:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:29,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 18:59:29,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:29,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:29,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924011460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:29,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:29,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 18:59:29,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535354915] [2023-08-30 18:59:29,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:29,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 18:59:29,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:29,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 18:59:29,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:59:29,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-30 18:59:29,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 462 flow. Second operand has 8 states, 8 states have (on average 223.125) internal successors, (1785), 8 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:29,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:29,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-30 18:59:29,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:29,746 INFO L130 PetriNetUnfolder]: 184/360 cut-off events. [2023-08-30 18:59:29,747 INFO L131 PetriNetUnfolder]: For 1397/1397 co-relation queries the response was YES. [2023-08-30 18:59:29,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 360 events. 184/360 cut-off events. For 1397/1397 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1461 event pairs, 26 based on Foata normal form. 12/360 useless extension candidates. Maximal degree in co-relation 1748. Up to 161 conditions per place. [2023-08-30 18:59:29,749 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 61 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2023-08-30 18:59:29,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 734 flow [2023-08-30 18:59:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:29,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:29,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1142 transitions. [2023-08-30 18:59:29,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40640569395017795 [2023-08-30 18:59:29,753 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1142 transitions. [2023-08-30 18:59:29,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1142 transitions. [2023-08-30 18:59:29,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:29,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1142 transitions. [2023-08-30 18:59:29,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:29,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:29,760 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:29,761 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 462 flow. Second operand 5 states and 1142 transitions. [2023-08-30 18:59:29,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 734 flow [2023-08-30 18:59:29,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 718 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-30 18:59:29,766 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 485 flow [2023-08-30 18:59:29,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-08-30 18:59:29,766 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-08-30 18:59:29,767 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 485 flow [2023-08-30 18:59:29,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 223.125) internal successors, (1785), 8 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:29,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:29,768 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:29,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:29,974 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 [2023-08-30 18:59:29,974 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:29,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash -558172369, now seen corresponding path program 1 times [2023-08-30 18:59:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:29,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693842747] [2023-08-30 18:59:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:29,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:30,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:30,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693842747] [2023-08-30 18:59:30,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693842747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:30,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:30,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:30,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571813131] [2023-08-30 18:59:30,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:30,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:59:30,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:59:30,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:59:30,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-30 18:59:30,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 485 flow. Second operand has 5 states, 5 states have (on average 226.2) internal successors, (1131), 5 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:30,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-30 18:59:30,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:30,394 INFO L130 PetriNetUnfolder]: 174/340 cut-off events. [2023-08-30 18:59:30,394 INFO L131 PetriNetUnfolder]: For 1684/1684 co-relation queries the response was YES. [2023-08-30 18:59:30,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1783 conditions, 340 events. 174/340 cut-off events. For 1684/1684 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1344 event pairs, 48 based on Foata normal form. 4/332 useless extension candidates. Maximal degree in co-relation 1745. Up to 200 conditions per place. [2023-08-30 18:59:30,397 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 53 selfloop transitions, 12 changer transitions 9/74 dead transitions. [2023-08-30 18:59:30,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 753 flow [2023-08-30 18:59:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1156 transitions. [2023-08-30 18:59:30,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41138790035587186 [2023-08-30 18:59:30,400 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1156 transitions. [2023-08-30 18:59:30,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1156 transitions. [2023-08-30 18:59:30,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:30,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1156 transitions. [2023-08-30 18:59:30,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 231.2) internal successors, (1156), 5 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,419 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,420 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 485 flow. Second operand 5 states and 1156 transitions. [2023-08-30 18:59:30,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 753 flow [2023-08-30 18:59:30,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 723 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 18:59:30,426 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 500 flow [2023-08-30 18:59:30,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=500, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-30 18:59:30,427 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-08-30 18:59:30,427 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 500 flow [2023-08-30 18:59:30,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 226.2) internal successors, (1131), 5 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:30,429 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:30,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 18:59:30,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:30,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:30,429 INFO L85 PathProgramCache]: Analyzing trace with hash -124247684, now seen corresponding path program 2 times [2023-08-30 18:59:30,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:30,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123905114] [2023-08-30 18:59:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:30,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:30,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:30,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123905114] [2023-08-30 18:59:30,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123905114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:30,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318002750] [2023-08-30 18:59:30,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:59:30,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:30,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:30,591 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) [2023-08-30 18:59:30,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 18:59:30,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:59:30,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:59:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 18:59:30,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:30,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:30,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318002750] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:30,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:59:30,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2023-08-30 18:59:30,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656122235] [2023-08-30 18:59:30,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:30,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:59:30,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:59:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 18:59:31,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 562 [2023-08-30 18:59:31,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:31,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:31,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 562 [2023-08-30 18:59:31,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:31,169 INFO L130 PetriNetUnfolder]: 162/317 cut-off events. [2023-08-30 18:59:31,169 INFO L131 PetriNetUnfolder]: For 1430/1430 co-relation queries the response was YES. [2023-08-30 18:59:31,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1718 conditions, 317 events. 162/317 cut-off events. For 1430/1430 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1232 event pairs, 18 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 1678. Up to 240 conditions per place. [2023-08-30 18:59:31,172 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 57 selfloop transitions, 13 changer transitions 0/70 dead transitions. [2023-08-30 18:59:31,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 70 transitions, 739 flow [2023-08-30 18:59:31,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:31,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1159 transitions. [2023-08-30 18:59:31,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41245551601423486 [2023-08-30 18:59:31,176 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1159 transitions. [2023-08-30 18:59:31,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1159 transitions. [2023-08-30 18:59:31,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:31,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1159 transitions. [2023-08-30 18:59:31,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 231.8) internal successors, (1159), 5 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:31,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:31,183 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:31,183 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 500 flow. Second operand 5 states and 1159 transitions. [2023-08-30 18:59:31,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 70 transitions, 739 flow [2023-08-30 18:59:31,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 705 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-30 18:59:31,189 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 524 flow [2023-08-30 18:59:31,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-08-30 18:59:31,190 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-08-30 18:59:31,190 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 524 flow [2023-08-30 18:59:31,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:31,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:31,191 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:31,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:31,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:31,397 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:31,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:31,397 INFO L85 PathProgramCache]: Analyzing trace with hash 83227730, now seen corresponding path program 3 times [2023-08-30 18:59:31,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:31,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748820049] [2023-08-30 18:59:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:31,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:31,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:31,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748820049] [2023-08-30 18:59:31,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748820049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:31,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:31,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:31,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164723910] [2023-08-30 18:59:31,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:31,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:59:31,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:31,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:59:31,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:59:31,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-30 18:59:31,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 524 flow. Second operand has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:31,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:31,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-30 18:59:31,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:31,773 INFO L130 PetriNetUnfolder]: 158/305 cut-off events. [2023-08-30 18:59:31,774 INFO L131 PetriNetUnfolder]: For 1625/1625 co-relation queries the response was YES. [2023-08-30 18:59:31,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1685 conditions, 305 events. 158/305 cut-off events. For 1625/1625 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1139 event pairs, 43 based on Foata normal form. 2/297 useless extension candidates. Maximal degree in co-relation 1646. Up to 189 conditions per place. [2023-08-30 18:59:31,776 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 52 selfloop transitions, 11 changer transitions 2/65 dead transitions. [2023-08-30 18:59:31,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 691 flow [2023-08-30 18:59:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1135 transitions. [2023-08-30 18:59:31,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40391459074733094 [2023-08-30 18:59:31,780 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1135 transitions. [2023-08-30 18:59:31,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1135 transitions. [2023-08-30 18:59:31,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:31,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1135 transitions. [2023-08-30 18:59:31,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:31,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:31,786 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:31,786 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 524 flow. Second operand 5 states and 1135 transitions. [2023-08-30 18:59:31,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 691 flow [2023-08-30 18:59:31,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 676 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 18:59:31,793 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 512 flow [2023-08-30 18:59:31,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-08-30 18:59:31,793 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2023-08-30 18:59:31,793 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 512 flow [2023-08-30 18:59:31,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:31,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:31,794 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:31,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 18:59:31,795 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:31,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:31,795 INFO L85 PathProgramCache]: Analyzing trace with hash 452015418, now seen corresponding path program 4 times [2023-08-30 18:59:31,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:31,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22000407] [2023-08-30 18:59:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:31,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:31,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:31,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22000407] [2023-08-30 18:59:31,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22000407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:31,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:31,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:31,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435600547] [2023-08-30 18:59:31,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:59:31,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:59:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:59:32,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-30 18:59:32,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 512 flow. Second operand has 5 states, 5 states have (on average 226.2) internal successors, (1131), 5 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:32,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-30 18:59:32,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:32,156 INFO L130 PetriNetUnfolder]: 155/300 cut-off events. [2023-08-30 18:59:32,156 INFO L131 PetriNetUnfolder]: For 1597/1597 co-relation queries the response was YES. [2023-08-30 18:59:32,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 300 events. 155/300 cut-off events. For 1597/1597 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1126 event pairs, 37 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 1626. Up to 200 conditions per place. [2023-08-30 18:59:32,158 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 53 selfloop transitions, 14 changer transitions 7/74 dead transitions. [2023-08-30 18:59:32,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 815 flow [2023-08-30 18:59:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1154 transitions. [2023-08-30 18:59:32,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106761565836299 [2023-08-30 18:59:32,162 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1154 transitions. [2023-08-30 18:59:32,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1154 transitions. [2023-08-30 18:59:32,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:32,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1154 transitions. [2023-08-30 18:59:32,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 230.8) internal successors, (1154), 5 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,168 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,168 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 512 flow. Second operand 5 states and 1154 transitions. [2023-08-30 18:59:32,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 815 flow [2023-08-30 18:59:32,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 800 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 18:59:32,174 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 549 flow [2023-08-30 18:59:32,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=549, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-08-30 18:59:32,174 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-08-30 18:59:32,175 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 549 flow [2023-08-30 18:59:32,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 226.2) internal successors, (1131), 5 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:32,175 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:32,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 18:59:32,176 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:32,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1469209266, now seen corresponding path program 5 times [2023-08-30 18:59:32,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:32,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538573696] [2023-08-30 18:59:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:32,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:32,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:32,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538573696] [2023-08-30 18:59:32,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538573696] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:32,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:32,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:32,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313611976] [2023-08-30 18:59:32,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:32,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:59:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:59:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:59:32,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-30 18:59:32,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 549 flow. Second operand has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:32,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-30 18:59:32,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:32,555 INFO L130 PetriNetUnfolder]: 150/286 cut-off events. [2023-08-30 18:59:32,555 INFO L131 PetriNetUnfolder]: For 1693/1693 co-relation queries the response was YES. [2023-08-30 18:59:32,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1681 conditions, 286 events. 150/286 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1013 event pairs, 39 based on Foata normal form. 2/278 useless extension candidates. Maximal degree in co-relation 1640. Up to 200 conditions per place. [2023-08-30 18:59:32,558 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 49 selfloop transitions, 14 changer transitions 2/65 dead transitions. [2023-08-30 18:59:32,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 742 flow [2023-08-30 18:59:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1136 transitions. [2023-08-30 18:59:32,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40427046263345195 [2023-08-30 18:59:32,561 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1136 transitions. [2023-08-30 18:59:32,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1136 transitions. [2023-08-30 18:59:32,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:32,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1136 transitions. [2023-08-30 18:59:32,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,568 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,568 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 549 flow. Second operand 5 states and 1136 transitions. [2023-08-30 18:59:32,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 742 flow [2023-08-30 18:59:32,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 708 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-30 18:59:32,574 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 537 flow [2023-08-30 18:59:32,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-08-30 18:59:32,574 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2023-08-30 18:59:32,574 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 537 flow [2023-08-30 18:59:32,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:32,575 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:32,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 18:59:32,576 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:32,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:32,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1010058385, now seen corresponding path program 2 times [2023-08-30 18:59:32,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:32,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891062672] [2023-08-30 18:59:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:32,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:32,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:32,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891062672] [2023-08-30 18:59:32,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891062672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:32,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:32,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:32,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835652531] [2023-08-30 18:59:32,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:32,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:59:32,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:32,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:59:32,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:59:32,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 562 [2023-08-30 18:59:32,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 537 flow. Second operand has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:32,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 562 [2023-08-30 18:59:32,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:32,912 INFO L130 PetriNetUnfolder]: 145/274 cut-off events. [2023-08-30 18:59:32,913 INFO L131 PetriNetUnfolder]: For 1653/1653 co-relation queries the response was YES. [2023-08-30 18:59:32,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 274 events. 145/274 cut-off events. For 1653/1653 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 960 event pairs, 11 based on Foata normal form. 8/276 useless extension candidates. Maximal degree in co-relation 1558. Up to 137 conditions per place. [2023-08-30 18:59:32,916 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 51 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2023-08-30 18:59:32,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 755 flow [2023-08-30 18:59:32,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1158 transitions. [2023-08-30 18:59:32,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4120996441281139 [2023-08-30 18:59:32,919 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1158 transitions. [2023-08-30 18:59:32,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1158 transitions. [2023-08-30 18:59:32,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:32,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1158 transitions. [2023-08-30 18:59:32,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 231.6) internal successors, (1158), 5 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,925 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,925 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 537 flow. Second operand 5 states and 1158 transitions. [2023-08-30 18:59:32,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 755 flow [2023-08-30 18:59:32,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 732 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 18:59:32,931 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 544 flow [2023-08-30 18:59:32,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=544, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-08-30 18:59:32,932 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-08-30 18:59:32,932 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 544 flow [2023-08-30 18:59:32,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:32,933 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:32,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 18:59:32,933 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:32,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:32,933 INFO L85 PathProgramCache]: Analyzing trace with hash 813217747, now seen corresponding path program 3 times [2023-08-30 18:59:32,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:32,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045713381] [2023-08-30 18:59:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:32,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:33,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:33,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045713381] [2023-08-30 18:59:33,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045713381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:33,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:33,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:33,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418768434] [2023-08-30 18:59:33,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:33,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:59:33,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:33,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:59:33,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:59:33,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-30 18:59:33,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:33,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:33,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-30 18:59:33,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:33,273 INFO L130 PetriNetUnfolder]: 141/270 cut-off events. [2023-08-30 18:59:33,273 INFO L131 PetriNetUnfolder]: For 1886/1886 co-relation queries the response was YES. [2023-08-30 18:59:33,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 270 events. 141/270 cut-off events. For 1886/1886 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 946 event pairs, 41 based on Foata normal form. 4/266 useless extension candidates. Maximal degree in co-relation 1546. Up to 187 conditions per place. [2023-08-30 18:59:33,276 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 44 selfloop transitions, 13 changer transitions 4/61 dead transitions. [2023-08-30 18:59:33,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 61 transitions, 699 flow [2023-08-30 18:59:33,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1135 transitions. [2023-08-30 18:59:33,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40391459074733094 [2023-08-30 18:59:33,279 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1135 transitions. [2023-08-30 18:59:33,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1135 transitions. [2023-08-30 18:59:33,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:33,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1135 transitions. [2023-08-30 18:59:33,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:33,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:33,285 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:33,285 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 544 flow. Second operand 5 states and 1135 transitions. [2023-08-30 18:59:33,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 61 transitions, 699 flow [2023-08-30 18:59:33,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 668 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 18:59:33,291 INFO L231 Difference]: Finished difference. Result has 72 places, 49 transitions, 509 flow [2023-08-30 18:59:33,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=509, PETRI_PLACES=72, PETRI_TRANSITIONS=49} [2023-08-30 18:59:33,291 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-08-30 18:59:33,291 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 49 transitions, 509 flow [2023-08-30 18:59:33,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:33,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:33,292 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:33,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 18:59:33,292 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:33,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2119422363, now seen corresponding path program 4 times [2023-08-30 18:59:33,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:33,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260832484] [2023-08-30 18:59:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:33,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:33,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:33,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260832484] [2023-08-30 18:59:33,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260832484] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:33,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:33,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:33,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131215533] [2023-08-30 18:59:33,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:33,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:59:33,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:33,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:59:33,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:59:33,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-30 18:59:33,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 49 transitions, 509 flow. Second operand has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:33,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:33,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-30 18:59:33,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:33,625 INFO L130 PetriNetUnfolder]: 124/230 cut-off events. [2023-08-30 18:59:33,625 INFO L131 PetriNetUnfolder]: For 1587/1587 co-relation queries the response was YES. [2023-08-30 18:59:33,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 230 events. 124/230 cut-off events. For 1587/1587 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 718 event pairs, 31 based on Foata normal form. 4/230 useless extension candidates. Maximal degree in co-relation 1364. Up to 144 conditions per place. [2023-08-30 18:59:33,627 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 43 selfloop transitions, 14 changer transitions 0/57 dead transitions. [2023-08-30 18:59:33,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 57 transitions, 660 flow [2023-08-30 18:59:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1135 transitions. [2023-08-30 18:59:33,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40391459074733094 [2023-08-30 18:59:33,631 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1135 transitions. [2023-08-30 18:59:33,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1135 transitions. [2023-08-30 18:59:33,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:33,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1135 transitions. [2023-08-30 18:59:33,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:33,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:33,638 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:33,638 INFO L175 Difference]: Start difference. First operand has 72 places, 49 transitions, 509 flow. Second operand 5 states and 1135 transitions. [2023-08-30 18:59:33,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 57 transitions, 660 flow [2023-08-30 18:59:33,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 612 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 18:59:33,645 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 464 flow [2023-08-30 18:59:33,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2023-08-30 18:59:33,646 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-08-30 18:59:33,646 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 464 flow [2023-08-30 18:59:33,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:33,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:33,647 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:33,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 18:59:33,647 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:33,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:33,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1470993204, now seen corresponding path program 6 times [2023-08-30 18:59:33,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:33,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985099854] [2023-08-30 18:59:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:33,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:33,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:33,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985099854] [2023-08-30 18:59:33,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985099854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:33,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:33,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:59:33,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645113069] [2023-08-30 18:59:33,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:33,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:59:33,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:33,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:59:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:59:33,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-30 18:59:33,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:33,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:33,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-30 18:59:33,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:33,997 INFO L130 PetriNetUnfolder]: 114/205 cut-off events. [2023-08-30 18:59:33,997 INFO L131 PetriNetUnfolder]: For 1406/1406 co-relation queries the response was YES. [2023-08-30 18:59:33,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 205 events. 114/205 cut-off events. For 1406/1406 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 601 event pairs, 31 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 1221. Up to 152 conditions per place. [2023-08-30 18:59:33,999 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 41 selfloop transitions, 13 changer transitions 0/54 dead transitions. [2023-08-30 18:59:33,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 54 transitions, 609 flow [2023-08-30 18:59:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1134 transitions. [2023-08-30 18:59:34,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40355871886121 [2023-08-30 18:59:34,003 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1134 transitions. [2023-08-30 18:59:34,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1134 transitions. [2023-08-30 18:59:34,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:34,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1134 transitions. [2023-08-30 18:59:34,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 226.8) internal successors, (1134), 5 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:34,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:34,009 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:34,009 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 464 flow. Second operand 5 states and 1134 transitions. [2023-08-30 18:59:34,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 54 transitions, 609 flow [2023-08-30 18:59:34,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 54 transitions, 539 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-30 18:59:34,015 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 405 flow [2023-08-30 18:59:34,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=405, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-08-30 18:59:34,015 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-08-30 18:59:34,015 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 405 flow [2023-08-30 18:59:34,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:34,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:34,016 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:34,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 18:59:34,016 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:34,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash 727784278, now seen corresponding path program 1 times [2023-08-30 18:59:34,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:34,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279445363] [2023-08-30 18:59:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:34,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:34,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:34,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279445363] [2023-08-30 18:59:34,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279445363] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:34,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465233517] [2023-08-30 18:59:34,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:34,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:34,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:34,989 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) [2023-08-30 18:59:35,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 18:59:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:35,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 18:59:35,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:35,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 62 [2023-08-30 18:59:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:35,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:37,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:59:37,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 144 [2023-08-30 18:59:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:37,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465233517] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:37,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:37,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-30 18:59:37,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354939476] [2023-08-30 18:59:37,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:37,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:59:37,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:59:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:59:38,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 562 [2023-08-30 18:59:38,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 405 flow. Second operand has 23 states, 23 states have (on average 198.04347826086956) internal successors, (4555), 23 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:38,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:38,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 562 [2023-08-30 18:59:38,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:41,733 INFO L130 PetriNetUnfolder]: 265/503 cut-off events. [2023-08-30 18:59:41,733 INFO L131 PetriNetUnfolder]: For 2245/2245 co-relation queries the response was YES. [2023-08-30 18:59:41,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 503 events. 265/503 cut-off events. For 2245/2245 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2212 event pairs, 15 based on Foata normal form. 3/504 useless extension candidates. Maximal degree in co-relation 2583. Up to 142 conditions per place. [2023-08-30 18:59:41,737 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 90 selfloop transitions, 51 changer transitions 28/169 dead transitions. [2023-08-30 18:59:41,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 169 transitions, 1513 flow [2023-08-30 18:59:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 18:59:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 18:59:41,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4645 transitions. [2023-08-30 18:59:41,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35935324152870185 [2023-08-30 18:59:41,748 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4645 transitions. [2023-08-30 18:59:41,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4645 transitions. [2023-08-30 18:59:41,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:41,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4645 transitions. [2023-08-30 18:59:41,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 201.95652173913044) internal successors, (4645), 23 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:41,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 562.0) internal successors, (13488), 24 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:41,772 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 562.0) internal successors, (13488), 24 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:41,772 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 405 flow. Second operand 23 states and 4645 transitions. [2023-08-30 18:59:41,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 169 transitions, 1513 flow [2023-08-30 18:59:41,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 169 transitions, 1435 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 18:59:41,779 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 933 flow [2023-08-30 18:59:41,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=933, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-08-30 18:59:41,780 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-08-30 18:59:41,780 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 933 flow [2023-08-30 18:59:41,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 198.04347826086956) internal successors, (4555), 23 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:41,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:41,781 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:41,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:41,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 18:59:41,988 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:41,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:41,988 INFO L85 PathProgramCache]: Analyzing trace with hash 765734618, now seen corresponding path program 2 times [2023-08-30 18:59:41,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:41,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337314192] [2023-08-30 18:59:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:41,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:42,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:42,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337314192] [2023-08-30 18:59:42,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337314192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:42,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658704484] [2023-08-30 18:59:42,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:59:42,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:42,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:42,946 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) [2023-08-30 18:59:42,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 18:59:43,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:59:43,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:59:43,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 18:59:43,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:43,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 115 [2023-08-30 18:59:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:43,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:45,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:59:45,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 220 [2023-08-30 18:59:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:45,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658704484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:45,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:45,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-08-30 18:59:45,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483454217] [2023-08-30 18:59:45,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:45,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:59:45,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:45,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:59:45,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:59:47,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 18:59:47,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 933 flow. Second operand has 22 states, 22 states have (on average 196.0) internal successors, (4312), 22 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:47,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:47,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 18:59:47,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:49,313 INFO L130 PetriNetUnfolder]: 309/625 cut-off events. [2023-08-30 18:59:49,313 INFO L131 PetriNetUnfolder]: For 3511/3511 co-relation queries the response was YES. [2023-08-30 18:59:49,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3600 conditions, 625 events. 309/625 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3053 event pairs, 42 based on Foata normal form. 3/628 useless extension candidates. Maximal degree in co-relation 3554. Up to 184 conditions per place. [2023-08-30 18:59:49,318 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 96 selfloop transitions, 58 changer transitions 7/161 dead transitions. [2023-08-30 18:59:49,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 161 transitions, 1887 flow [2023-08-30 18:59:49,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 18:59:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 18:59:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3189 transitions. [2023-08-30 18:59:49,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546485765124555 [2023-08-30 18:59:49,323 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3189 transitions. [2023-08-30 18:59:49,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3189 transitions. [2023-08-30 18:59:49,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:49,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3189 transitions. [2023-08-30 18:59:49,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 199.3125) internal successors, (3189), 16 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:49,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:49,336 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:49,337 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 933 flow. Second operand 16 states and 3189 transitions. [2023-08-30 18:59:49,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 161 transitions, 1887 flow [2023-08-30 18:59:49,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 161 transitions, 1564 flow, removed 143 selfloop flow, removed 6 redundant places. [2023-08-30 18:59:49,353 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 1196 flow [2023-08-30 18:59:49,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1196, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2023-08-30 18:59:49,354 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-08-30 18:59:49,354 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 1196 flow [2023-08-30 18:59:49,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 196.0) internal successors, (4312), 22 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:49,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:49,355 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:49,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:49,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:49,562 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:49,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:49,562 INFO L85 PathProgramCache]: Analyzing trace with hash -12713086, now seen corresponding path program 3 times [2023-08-30 18:59:49,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:49,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700596988] [2023-08-30 18:59:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:49,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:50,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:50,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700596988] [2023-08-30 18:59:50,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700596988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:50,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147093546] [2023-08-30 18:59:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:59:50,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:50,369 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) [2023-08-30 18:59:50,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 18:59:50,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:59:50,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:59:50,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 18:59:50,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:50,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 129 [2023-08-30 18:59:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:51,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:53,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:59:53,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 344 treesize of output 232 [2023-08-30 18:59:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:53,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147093546] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:53,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:53,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-30 18:59:53,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526685935] [2023-08-30 18:59:53,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:53,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:59:53,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:53,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:59:53,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:59:54,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 18:59:54,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 1196 flow. Second operand has 23 states, 23 states have (on average 196.1304347826087) internal successors, (4511), 23 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:54,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:54,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 18:59:54,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:57,524 INFO L130 PetriNetUnfolder]: 400/856 cut-off events. [2023-08-30 18:59:57,525 INFO L131 PetriNetUnfolder]: For 4962/4962 co-relation queries the response was YES. [2023-08-30 18:59:57,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4523 conditions, 856 events. 400/856 cut-off events. For 4962/4962 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4841 event pairs, 73 based on Foata normal form. 12/866 useless extension candidates. Maximal degree in co-relation 4474. Up to 411 conditions per place. [2023-08-30 18:59:57,532 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 141 selfloop transitions, 77 changer transitions 20/238 dead transitions. [2023-08-30 18:59:57,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 238 transitions, 2432 flow [2023-08-30 18:59:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 18:59:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 18:59:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5192 transitions. [2023-08-30 18:59:57,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3553243909115795 [2023-08-30 18:59:57,539 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5192 transitions. [2023-08-30 18:59:57,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5192 transitions. [2023-08-30 18:59:57,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:57,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5192 transitions. [2023-08-30 18:59:57,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 199.69230769230768) internal successors, (5192), 26 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:57,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 562.0) internal successors, (15174), 27 states have internal predecessors, (15174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:57,561 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 562.0) internal successors, (15174), 27 states have internal predecessors, (15174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:57,561 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 1196 flow. Second operand 26 states and 5192 transitions. [2023-08-30 18:59:57,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 238 transitions, 2432 flow [2023-08-30 18:59:57,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 238 transitions, 2236 flow, removed 85 selfloop flow, removed 4 redundant places. [2023-08-30 18:59:57,587 INFO L231 Difference]: Finished difference. Result has 130 places, 149 transitions, 1639 flow [2023-08-30 18:59:57,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1639, PETRI_PLACES=130, PETRI_TRANSITIONS=149} [2023-08-30 18:59:57,589 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2023-08-30 18:59:57,589 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 149 transitions, 1639 flow [2023-08-30 18:59:57,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 196.1304347826087) internal successors, (4511), 23 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:57,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:57,590 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:57,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:57,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:57,796 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:57,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:57,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2073572888, now seen corresponding path program 4 times [2023-08-30 18:59:57,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:57,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907890543] [2023-08-30 18:59:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:57,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:58,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:58,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907890543] [2023-08-30 18:59:58,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907890543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:58,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226028101] [2023-08-30 18:59:58,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:59:58,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:58,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:58,544 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) [2023-08-30 18:59:58,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 18:59:58,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:59:58,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:59:58,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 18:59:58,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:59,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 129 [2023-08-30 18:59:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:59,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:00,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:00,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 354 treesize of output 234 [2023-08-30 19:00:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:01,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226028101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:01,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:01,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-30 19:00:01,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017726382] [2023-08-30 19:00:01,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:01,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:00:01,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:01,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:00:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:00:02,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:00:02,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 149 transitions, 1639 flow. Second operand has 21 states, 21 states have (on average 196.04761904761904) internal successors, (4117), 21 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:02,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:02,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:00:02,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:04,108 INFO L130 PetriNetUnfolder]: 427/929 cut-off events. [2023-08-30 19:00:04,108 INFO L131 PetriNetUnfolder]: For 5290/5290 co-relation queries the response was YES. [2023-08-30 19:00:04,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4997 conditions, 929 events. 427/929 cut-off events. For 5290/5290 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5441 event pairs, 55 based on Foata normal form. 9/936 useless extension candidates. Maximal degree in co-relation 4939. Up to 239 conditions per place. [2023-08-30 19:00:04,114 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 127 selfloop transitions, 81 changer transitions 21/229 dead transitions. [2023-08-30 19:00:04,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 229 transitions, 2700 flow [2023-08-30 19:00:04,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 19:00:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 19:00:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3597 transitions. [2023-08-30 19:00:04,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3555753262158956 [2023-08-30 19:00:04,127 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3597 transitions. [2023-08-30 19:00:04,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3597 transitions. [2023-08-30 19:00:04,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:04,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3597 transitions. [2023-08-30 19:00:04,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 199.83333333333334) internal successors, (3597), 18 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:04,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 562.0) internal successors, (10678), 19 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:04,141 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 562.0) internal successors, (10678), 19 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:04,141 INFO L175 Difference]: Start difference. First operand has 130 places, 149 transitions, 1639 flow. Second operand 18 states and 3597 transitions. [2023-08-30 19:00:04,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 229 transitions, 2700 flow [2023-08-30 19:00:04,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 229 transitions, 2445 flow, removed 117 selfloop flow, removed 7 redundant places. [2023-08-30 19:00:04,176 INFO L231 Difference]: Finished difference. Result has 146 places, 163 transitions, 1802 flow [2023-08-30 19:00:04,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1802, PETRI_PLACES=146, PETRI_TRANSITIONS=163} [2023-08-30 19:00:04,177 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-08-30 19:00:04,177 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 163 transitions, 1802 flow [2023-08-30 19:00:04,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 196.04761904761904) internal successors, (4117), 21 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:04,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:04,178 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:04,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:04,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:04,384 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:04,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1557072660, now seen corresponding path program 5 times [2023-08-30 19:00:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:04,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700328631] [2023-08-30 19:00:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:04,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:05,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:05,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700328631] [2023-08-30 19:00:05,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700328631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:05,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977295839] [2023-08-30 19:00:05,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:00:05,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:05,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:05,188 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) [2023-08-30 19:00:05,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 19:00:05,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:00:05,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:05,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 19:00:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:05,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 139 [2023-08-30 19:00:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:05,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:07,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:07,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 213 [2023-08-30 19:00:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:07,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977295839] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:07,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:07,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-30 19:00:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048722957] [2023-08-30 19:00:07,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:07,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:00:07,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:00:07,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:00:08,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:00:08,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 163 transitions, 1802 flow. Second operand has 21 states, 21 states have (on average 196.04761904761904) internal successors, (4117), 21 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:08,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:08,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:00:08,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:09,861 INFO L130 PetriNetUnfolder]: 471/1035 cut-off events. [2023-08-30 19:00:09,861 INFO L131 PetriNetUnfolder]: For 6541/6541 co-relation queries the response was YES. [2023-08-30 19:00:09,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5678 conditions, 1035 events. 471/1035 cut-off events. For 6541/6541 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6357 event pairs, 78 based on Foata normal form. 2/1035 useless extension candidates. Maximal degree in co-relation 5614. Up to 441 conditions per place. [2023-08-30 19:00:09,869 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 160 selfloop transitions, 90 changer transitions 12/262 dead transitions. [2023-08-30 19:00:09,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 262 transitions, 3113 flow [2023-08-30 19:00:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 19:00:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 19:00:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4186 transitions. [2023-08-30 19:00:09,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35468564650059314 [2023-08-30 19:00:09,875 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4186 transitions. [2023-08-30 19:00:09,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4186 transitions. [2023-08-30 19:00:09,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:09,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4186 transitions. [2023-08-30 19:00:09,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 199.33333333333334) internal successors, (4186), 21 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:09,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 562.0) internal successors, (12364), 22 states have internal predecessors, (12364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:09,888 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 562.0) internal successors, (12364), 22 states have internal predecessors, (12364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:09,888 INFO L175 Difference]: Start difference. First operand has 146 places, 163 transitions, 1802 flow. Second operand 21 states and 4186 transitions. [2023-08-30 19:00:09,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 262 transitions, 3113 flow [2023-08-30 19:00:09,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 262 transitions, 2965 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-08-30 19:00:09,923 INFO L231 Difference]: Finished difference. Result has 163 places, 193 transitions, 2317 flow [2023-08-30 19:00:09,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2317, PETRI_PLACES=163, PETRI_TRANSITIONS=193} [2023-08-30 19:00:09,924 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-08-30 19:00:09,924 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 193 transitions, 2317 flow [2023-08-30 19:00:09,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 196.04761904761904) internal successors, (4117), 21 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:09,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:09,925 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:09,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 19:00:10,135 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,SelfDestructingSolverStorable21 [2023-08-30 19:00:10,135 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:10,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash -840476054, now seen corresponding path program 6 times [2023-08-30 19:00:10,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:10,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833023226] [2023-08-30 19:00:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:10,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:10,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:10,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833023226] [2023-08-30 19:00:10,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833023226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:10,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042116461] [2023-08-30 19:00:10,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:00:10,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:10,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:10,864 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) [2023-08-30 19:00:10,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 19:00:10,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:00:10,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:11,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 19:00:11,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:11,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 118 [2023-08-30 19:00:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:11,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:13,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:13,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 441 treesize of output 321 [2023-08-30 19:00:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:14,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042116461] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:14,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:14,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-30 19:00:14,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949332701] [2023-08-30 19:00:14,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:14,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 19:00:14,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:14,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 19:00:14,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-08-30 19:00:15,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:00:15,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 193 transitions, 2317 flow. Second operand has 23 states, 23 states have (on average 196.1304347826087) internal successors, (4511), 23 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:15,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:15,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:00:15,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:17,721 INFO L130 PetriNetUnfolder]: 536/1174 cut-off events. [2023-08-30 19:00:17,721 INFO L131 PetriNetUnfolder]: For 9351/9351 co-relation queries the response was YES. [2023-08-30 19:00:17,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6811 conditions, 1174 events. 536/1174 cut-off events. For 9351/9351 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7459 event pairs, 94 based on Foata normal form. 14/1186 useless extension candidates. Maximal degree in co-relation 6741. Up to 633 conditions per place. [2023-08-30 19:00:17,732 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 169 selfloop transitions, 99 changer transitions 22/290 dead transitions. [2023-08-30 19:00:17,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 290 transitions, 3711 flow [2023-08-30 19:00:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 19:00:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 19:00:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3998 transitions. [2023-08-30 19:00:17,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3556939501779359 [2023-08-30 19:00:17,740 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3998 transitions. [2023-08-30 19:00:17,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3998 transitions. [2023-08-30 19:00:17,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:17,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3998 transitions. [2023-08-30 19:00:17,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 199.9) internal successors, (3998), 20 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:17,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 562.0) internal successors, (11802), 21 states have internal predecessors, (11802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:17,752 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 562.0) internal successors, (11802), 21 states have internal predecessors, (11802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:17,752 INFO L175 Difference]: Start difference. First operand has 163 places, 193 transitions, 2317 flow. Second operand 20 states and 3998 transitions. [2023-08-30 19:00:17,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 290 transitions, 3711 flow [2023-08-30 19:00:17,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 290 transitions, 3528 flow, removed 73 selfloop flow, removed 4 redundant places. [2023-08-30 19:00:17,805 INFO L231 Difference]: Finished difference. Result has 185 places, 217 transitions, 2730 flow [2023-08-30 19:00:17,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2730, PETRI_PLACES=185, PETRI_TRANSITIONS=217} [2023-08-30 19:00:17,806 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2023-08-30 19:00:17,806 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 217 transitions, 2730 flow [2023-08-30 19:00:17,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 196.1304347826087) internal successors, (4511), 23 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:17,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:17,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:17,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:18,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:18,013 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:18,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:18,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1290945382, now seen corresponding path program 7 times [2023-08-30 19:00:18,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:18,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933582835] [2023-08-30 19:00:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:18,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:18,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:18,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933582835] [2023-08-30 19:00:18,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933582835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:18,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880355238] [2023-08-30 19:00:18,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:00:18,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:18,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:18,809 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) [2023-08-30 19:00:18,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 19:00:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:18,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 19:00:18,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:19,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 117 [2023-08-30 19:00:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:19,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:20,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:20,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 184 [2023-08-30 19:00:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:20,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880355238] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:20,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:20,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-30 19:00:20,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856748303] [2023-08-30 19:00:20,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:20,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:00:20,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:00:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:00:21,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 562 [2023-08-30 19:00:21,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 217 transitions, 2730 flow. Second operand has 21 states, 21 states have (on average 196.9047619047619) internal successors, (4135), 21 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:21,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:21,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 562 [2023-08-30 19:00:21,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:24,536 INFO L130 PetriNetUnfolder]: 729/1682 cut-off events. [2023-08-30 19:00:24,536 INFO L131 PetriNetUnfolder]: For 15656/15656 co-relation queries the response was YES. [2023-08-30 19:00:24,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10298 conditions, 1682 events. 729/1682 cut-off events. For 15656/15656 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12084 event pairs, 71 based on Foata normal form. 9/1689 useless extension candidates. Maximal degree in co-relation 10220. Up to 433 conditions per place. [2023-08-30 19:00:24,549 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 180 selfloop transitions, 187 changer transitions 24/391 dead transitions. [2023-08-30 19:00:24,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 391 transitions, 5330 flow [2023-08-30 19:00:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 19:00:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 19:00:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5411 transitions. [2023-08-30 19:00:24,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35659681033346513 [2023-08-30 19:00:24,555 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5411 transitions. [2023-08-30 19:00:24,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5411 transitions. [2023-08-30 19:00:24,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:24,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5411 transitions. [2023-08-30 19:00:24,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 200.40740740740742) internal successors, (5411), 27 states have internal predecessors, (5411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:24,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:24,572 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:24,572 INFO L175 Difference]: Start difference. First operand has 185 places, 217 transitions, 2730 flow. Second operand 27 states and 5411 transitions. [2023-08-30 19:00:24,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 391 transitions, 5330 flow [2023-08-30 19:00:24,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 391 transitions, 5136 flow, removed 92 selfloop flow, removed 7 redundant places. [2023-08-30 19:00:24,666 INFO L231 Difference]: Finished difference. Result has 214 places, 289 transitions, 4361 flow [2023-08-30 19:00:24,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4361, PETRI_PLACES=214, PETRI_TRANSITIONS=289} [2023-08-30 19:00:24,667 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2023-08-30 19:00:24,667 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 289 transitions, 4361 flow [2023-08-30 19:00:24,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 196.9047619047619) internal successors, (4135), 21 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:24,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:24,668 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:24,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:24,873 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,SelfDestructingSolverStorable23 [2023-08-30 19:00:24,873 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:24,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash 781489274, now seen corresponding path program 8 times [2023-08-30 19:00:24,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:24,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721077912] [2023-08-30 19:00:24,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:24,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:25,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:25,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721077912] [2023-08-30 19:00:25,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721077912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:25,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050804789] [2023-08-30 19:00:25,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:00:25,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:25,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:25,549 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) [2023-08-30 19:00:25,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 19:00:25,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:00:25,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:25,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 19:00:25,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:26,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 91 [2023-08-30 19:00:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:26,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:27,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:27,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 400 treesize of output 248 [2023-08-30 19:00:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:27,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050804789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:27,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:27,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-30 19:00:27,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735940733] [2023-08-30 19:00:27,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:27,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:00:27,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:00:27,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:00:28,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:00:28,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 289 transitions, 4361 flow. Second operand has 20 states, 20 states have (on average 195.95) internal successors, (3919), 20 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:28,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:28,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:00:28,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:30,399 INFO L130 PetriNetUnfolder]: 712/1628 cut-off events. [2023-08-30 19:00:30,399 INFO L131 PetriNetUnfolder]: For 17124/17124 co-relation queries the response was YES. [2023-08-30 19:00:30,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10794 conditions, 1628 events. 712/1628 cut-off events. For 17124/17124 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11401 event pairs, 142 based on Foata normal form. 4/1632 useless extension candidates. Maximal degree in co-relation 10706. Up to 755 conditions per place. [2023-08-30 19:00:30,410 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 203 selfloop transitions, 122 changer transitions 15/340 dead transitions. [2023-08-30 19:00:30,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 340 transitions, 5390 flow [2023-08-30 19:00:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:00:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:00:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3386 transitions. [2023-08-30 19:00:30,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35440653129579236 [2023-08-30 19:00:30,414 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3386 transitions. [2023-08-30 19:00:30,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3386 transitions. [2023-08-30 19:00:30,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:30,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3386 transitions. [2023-08-30 19:00:30,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 199.1764705882353) internal successors, (3386), 17 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:30,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:30,425 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:30,425 INFO L175 Difference]: Start difference. First operand has 214 places, 289 transitions, 4361 flow. Second operand 17 states and 3386 transitions. [2023-08-30 19:00:30,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 340 transitions, 5390 flow [2023-08-30 19:00:30,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 340 transitions, 4619 flow, removed 335 selfloop flow, removed 13 redundant places. [2023-08-30 19:00:30,579 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 3899 flow [2023-08-30 19:00:30,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=3683, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3899, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2023-08-30 19:00:30,579 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 194 predicate places. [2023-08-30 19:00:30,579 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 3899 flow [2023-08-30 19:00:30,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 195.95) internal successors, (3919), 20 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:30,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:30,580 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:30,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 19:00:30,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 19:00:30,785 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:30,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:30,785 INFO L85 PathProgramCache]: Analyzing trace with hash 854566266, now seen corresponding path program 9 times [2023-08-30 19:00:30,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:30,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537463908] [2023-08-30 19:00:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:30,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:31,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:31,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537463908] [2023-08-30 19:00:31,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537463908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:31,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368804672] [2023-08-30 19:00:31,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:00:31,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:31,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:31,571 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:31,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 19:00:31,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:00:31,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:31,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 19:00:31,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:32,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:00:32,006 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 100 treesize of output 90 [2023-08-30 19:00:32,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 104 [2023-08-30 19:00:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:32,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:34,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:34,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 356 treesize of output 276 [2023-08-30 19:00:34,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 181 [2023-08-30 19:00:34,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 179 [2023-08-30 19:00:34,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 177 [2023-08-30 19:00:34,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 175 [2023-08-30 19:00:34,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 173 [2023-08-30 19:00:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:34,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368804672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:34,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:34,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-30 19:00:34,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987702648] [2023-08-30 19:00:34,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:34,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 19:00:34,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 19:00:34,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=661, Unknown=4, NotChecked=0, Total=756 [2023-08-30 19:00:37,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 562 [2023-08-30 19:00:37,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 3899 flow. Second operand has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:37,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:37,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 562 [2023-08-30 19:00:37,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:38,797 INFO L130 PetriNetUnfolder]: 812/1860 cut-off events. [2023-08-30 19:00:38,797 INFO L131 PetriNetUnfolder]: For 14241/14241 co-relation queries the response was YES. [2023-08-30 19:00:38,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10934 conditions, 1860 events. 812/1860 cut-off events. For 14241/14241 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13453 event pairs, 178 based on Foata normal form. 5/1865 useless extension candidates. Maximal degree in co-relation 10851. Up to 824 conditions per place. [2023-08-30 19:00:38,811 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 183 selfloop transitions, 156 changer transitions 14/353 dead transitions. [2023-08-30 19:00:38,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 353 transitions, 5316 flow [2023-08-30 19:00:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 19:00:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 19:00:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2135 transitions. [2023-08-30 19:00:38,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3165776986951364 [2023-08-30 19:00:38,814 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2135 transitions. [2023-08-30 19:00:38,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2135 transitions. [2023-08-30 19:00:38,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:38,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2135 transitions. [2023-08-30 19:00:38,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 177.91666666666666) internal successors, (2135), 12 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:38,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:38,857 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:38,857 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 3899 flow. Second operand 12 states and 2135 transitions. [2023-08-30 19:00:38,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 353 transitions, 5316 flow [2023-08-30 19:00:38,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 353 transitions, 5058 flow, removed 22 selfloop flow, removed 11 redundant places. [2023-08-30 19:00:38,957 INFO L231 Difference]: Finished difference. Result has 216 places, 304 transitions, 4374 flow [2023-08-30 19:00:38,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=3686, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4374, PETRI_PLACES=216, PETRI_TRANSITIONS=304} [2023-08-30 19:00:38,958 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2023-08-30 19:00:38,958 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 304 transitions, 4374 flow [2023-08-30 19:00:38,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:38,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:38,958 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:38,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:39,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 19:00:39,159 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:39,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:39,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1888333352, now seen corresponding path program 10 times [2023-08-30 19:00:39,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:39,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732739120] [2023-08-30 19:00:39,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:39,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:39,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:39,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732739120] [2023-08-30 19:00:39,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732739120] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:39,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698797357] [2023-08-30 19:00:39,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:00:39,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:39,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:39,969 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:39,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 19:00:40,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:00:40,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:40,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 19:00:40,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:40,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:00:40,228 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 42 treesize of output 40 [2023-08-30 19:00:40,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 110 [2023-08-30 19:00:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:40,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:41,953 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (let ((.cse0 (forall ((v_ArrVal_748 (Array Int Int))) (not (= c_~name_1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_748) c_~nondet_0~0.base) c_~nondet_0~0.offset))))) (.cse1 (< c_~i_4~0 3))) (and (or .cse0 (< 0 c_~result_3~0)) (or (and (< c_~result_3~0 0) (or (< (+ 2147483647 c_~name_2~0) c_~name_1~0) (< c_~name_1~0 c_~name_2~0) .cse1)) (forall ((v_ArrVal_748 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_748) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0)))) (or .cse0 (< c_~name_2~0 c_~name_1~0) (< (+ c_~name_1~0 2147483648) c_~name_2~0) .cse1)))) is different from false [2023-08-30 19:00:42,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:42,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 145 [2023-08-30 19:00:42,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 92 [2023-08-30 19:00:42,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 90 [2023-08-30 19:00:42,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 88 [2023-08-30 19:00:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:42,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698797357] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:42,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:42,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-30 19:00:42,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865761892] [2023-08-30 19:00:42,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:42,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 19:00:42,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:42,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 19:00:42,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=618, Unknown=1, NotChecked=50, Total=756 [2023-08-30 19:00:42,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 562 [2023-08-30 19:00:42,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 304 transitions, 4374 flow. Second operand has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:42,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:42,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 562 [2023-08-30 19:00:42,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:44,640 INFO L130 PetriNetUnfolder]: 810/1873 cut-off events. [2023-08-30 19:00:44,640 INFO L131 PetriNetUnfolder]: For 15319/15319 co-relation queries the response was YES. [2023-08-30 19:00:44,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11213 conditions, 1873 events. 810/1873 cut-off events. For 15319/15319 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13750 event pairs, 167 based on Foata normal form. 35/1908 useless extension candidates. Maximal degree in co-relation 11128. Up to 771 conditions per place. [2023-08-30 19:00:44,657 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 225 selfloop transitions, 142 changer transitions 25/392 dead transitions. [2023-08-30 19:00:44,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 392 transitions, 5972 flow [2023-08-30 19:00:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:00:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:00:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2856 transitions. [2023-08-30 19:00:44,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31761565836298933 [2023-08-30 19:00:44,661 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2856 transitions. [2023-08-30 19:00:44,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2856 transitions. [2023-08-30 19:00:44,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:44,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2856 transitions. [2023-08-30 19:00:44,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 178.5) internal successors, (2856), 16 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:44,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:44,671 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:44,671 INFO L175 Difference]: Start difference. First operand has 216 places, 304 transitions, 4374 flow. Second operand 16 states and 2856 transitions. [2023-08-30 19:00:44,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 392 transitions, 5972 flow [2023-08-30 19:00:44,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 392 transitions, 5854 flow, removed 33 selfloop flow, removed 7 redundant places. [2023-08-30 19:00:44,802 INFO L231 Difference]: Finished difference. Result has 232 places, 315 transitions, 4888 flow [2023-08-30 19:00:44,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4262, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4888, PETRI_PLACES=232, PETRI_TRANSITIONS=315} [2023-08-30 19:00:44,803 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2023-08-30 19:00:44,803 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 315 transitions, 4888 flow [2023-08-30 19:00:44,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:44,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:44,804 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:44,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:45,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 19:00:45,009 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:45,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:45,010 INFO L85 PathProgramCache]: Analyzing trace with hash 869721443, now seen corresponding path program 11 times [2023-08-30 19:00:45,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:45,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897036929] [2023-08-30 19:00:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:45,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:45,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:45,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897036929] [2023-08-30 19:00:45,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897036929] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:45,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400122970] [2023-08-30 19:00:45,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:00:45,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:45,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:45,497 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:45,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 19:00:45,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:00:45,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:00:45,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:45,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2023-08-30 19:00:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:45,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:46,070 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 19:00:46,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2023-08-30 19:00:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:46,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400122970] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:46,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:46,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 19:00:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406512006] [2023-08-30 19:00:46,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:46,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:00:46,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:46,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:00:46,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:00:47,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 562 [2023-08-30 19:00:47,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 315 transitions, 4888 flow. Second operand has 18 states, 18 states have (on average 210.33333333333334) internal successors, (3786), 18 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:47,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:47,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 562 [2023-08-30 19:00:47,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:47,837 INFO L130 PetriNetUnfolder]: 800/1792 cut-off events. [2023-08-30 19:00:47,837 INFO L131 PetriNetUnfolder]: For 17105/17105 co-relation queries the response was YES. [2023-08-30 19:00:47,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 1792 events. 800/1792 cut-off events. For 17105/17105 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12587 event pairs, 88 based on Foata normal form. 16/1808 useless extension candidates. Maximal degree in co-relation 11550. Up to 368 conditions per place. [2023-08-30 19:00:47,851 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 253 selfloop transitions, 132 changer transitions 0/385 dead transitions. [2023-08-30 19:00:47,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 385 transitions, 6365 flow [2023-08-30 19:00:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:00:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:00:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2786 transitions. [2023-08-30 19:00:47,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813304133588831 [2023-08-30 19:00:47,857 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2786 transitions. [2023-08-30 19:00:47,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2786 transitions. [2023-08-30 19:00:47,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:47,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2786 transitions. [2023-08-30 19:00:47,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 214.30769230769232) internal successors, (2786), 13 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:47,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:47,876 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:47,876 INFO L175 Difference]: Start difference. First operand has 232 places, 315 transitions, 4888 flow. Second operand 13 states and 2786 transitions. [2023-08-30 19:00:47,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 385 transitions, 6365 flow [2023-08-30 19:00:48,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 385 transitions, 6137 flow, removed 49 selfloop flow, removed 6 redundant places. [2023-08-30 19:00:48,015 INFO L231 Difference]: Finished difference. Result has 237 places, 322 transitions, 5088 flow [2023-08-30 19:00:48,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4685, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5088, PETRI_PLACES=237, PETRI_TRANSITIONS=322} [2023-08-30 19:00:48,021 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2023-08-30 19:00:48,021 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 322 transitions, 5088 flow [2023-08-30 19:00:48,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 210.33333333333334) internal successors, (3786), 18 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:48,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:48,022 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:48,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:48,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:48,228 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:48,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:48,229 INFO L85 PathProgramCache]: Analyzing trace with hash -780460431, now seen corresponding path program 12 times [2023-08-30 19:00:48,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:48,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651082556] [2023-08-30 19:00:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:48,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:00:48,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:48,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651082556] [2023-08-30 19:00:48,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651082556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:48,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661923029] [2023-08-30 19:00:48,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:00:48,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:48,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:48,993 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:48,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 19:00:49,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:00:49,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:49,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:00:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:49,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-30 19:00:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:49,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:49,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:49,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-08-30 19:00:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:49,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661923029] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:49,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:49,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-08-30 19:00:49,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254464503] [2023-08-30 19:00:49,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:49,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 19:00:49,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:49,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 19:00:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-08-30 19:00:51,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 562 [2023-08-30 19:00:51,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 322 transitions, 5088 flow. Second operand has 23 states, 23 states have (on average 199.1304347826087) internal successors, (4580), 23 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:51,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:51,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 562 [2023-08-30 19:00:51,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:52,546 INFO L130 PetriNetUnfolder]: 1642/3655 cut-off events. [2023-08-30 19:00:52,546 INFO L131 PetriNetUnfolder]: For 34715/34715 co-relation queries the response was YES. [2023-08-30 19:00:52,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23751 conditions, 3655 events. 1642/3655 cut-off events. For 34715/34715 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 29456 event pairs, 323 based on Foata normal form. 34/3689 useless extension candidates. Maximal degree in co-relation 23450. Up to 1002 conditions per place. [2023-08-30 19:00:52,575 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 538 selfloop transitions, 200 changer transitions 1/739 dead transitions. [2023-08-30 19:00:52,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 739 transitions, 12566 flow [2023-08-30 19:00:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 19:00:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 19:00:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4473 transitions. [2023-08-30 19:00:52,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36177612423164024 [2023-08-30 19:00:52,582 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4473 transitions. [2023-08-30 19:00:52,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4473 transitions. [2023-08-30 19:00:52,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:52,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4473 transitions. [2023-08-30 19:00:52,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 203.3181818181818) internal successors, (4473), 22 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:52,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:52,595 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:52,595 INFO L175 Difference]: Start difference. First operand has 237 places, 322 transitions, 5088 flow. Second operand 22 states and 4473 transitions. [2023-08-30 19:00:52,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 739 transitions, 12566 flow [2023-08-30 19:00:52,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 739 transitions, 12386 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-08-30 19:00:52,926 INFO L231 Difference]: Finished difference. Result has 261 places, 437 transitions, 7906 flow [2023-08-30 19:00:52,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7906, PETRI_PLACES=261, PETRI_TRANSITIONS=437} [2023-08-30 19:00:52,927 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-08-30 19:00:52,927 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 437 transitions, 7906 flow [2023-08-30 19:00:52,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 199.1304347826087) internal successors, (4580), 23 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:52,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:52,928 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:52,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:53,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 19:00:53,133 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:53,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:53,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1335210813, now seen corresponding path program 13 times [2023-08-30 19:00:53,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:53,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226447233] [2023-08-30 19:00:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:53,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:53,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:53,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226447233] [2023-08-30 19:00:53,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226447233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:53,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844337033] [2023-08-30 19:00:53,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:00:53,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:53,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:53,749 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:53,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 19:00:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:53,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:00:53,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:54,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-08-30 19:00:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:54,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:54,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:54,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-08-30 19:00:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:54,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844337033] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:54,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:54,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2023-08-30 19:00:54,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922960931] [2023-08-30 19:00:54,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:54,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:00:54,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:54,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:00:54,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:00:55,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 562 [2023-08-30 19:00:55,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 437 transitions, 7906 flow. Second operand has 19 states, 19 states have (on average 199.1578947368421) internal successors, (3784), 19 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:55,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:55,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 562 [2023-08-30 19:00:55,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:56,892 INFO L130 PetriNetUnfolder]: 1660/3697 cut-off events. [2023-08-30 19:00:56,893 INFO L131 PetriNetUnfolder]: For 40990/40990 co-relation queries the response was YES. [2023-08-30 19:00:56,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24822 conditions, 3697 events. 1660/3697 cut-off events. For 40990/40990 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30131 event pairs, 377 based on Foata normal form. 8/3705 useless extension candidates. Maximal degree in co-relation 24454. Up to 1254 conditions per place. [2023-08-30 19:00:56,918 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 288 selfloop transitions, 209 changer transitions 3/500 dead transitions. [2023-08-30 19:00:56,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 500 transitions, 9491 flow [2023-08-30 19:00:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:00:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:00:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3445 transitions. [2023-08-30 19:00:56,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36058195520200964 [2023-08-30 19:00:56,921 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3445 transitions. [2023-08-30 19:00:56,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3445 transitions. [2023-08-30 19:00:56,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:56,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3445 transitions. [2023-08-30 19:00:56,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 202.64705882352942) internal successors, (3445), 17 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:56,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:56,931 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:56,931 INFO L175 Difference]: Start difference. First operand has 261 places, 437 transitions, 7906 flow. Second operand 17 states and 3445 transitions. [2023-08-30 19:00:56,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 500 transitions, 9491 flow [2023-08-30 19:00:57,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 500 transitions, 9448 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-30 19:00:57,263 INFO L231 Difference]: Finished difference. Result has 276 places, 440 transitions, 8445 flow [2023-08-30 19:00:57,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7829, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8445, PETRI_PLACES=276, PETRI_TRANSITIONS=440} [2023-08-30 19:00:57,263 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2023-08-30 19:00:57,264 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 440 transitions, 8445 flow [2023-08-30 19:00:57,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 199.1578947368421) internal successors, (3784), 19 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:57,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:57,264 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:57,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:57,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:57,470 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:57,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:57,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1635767085, now seen corresponding path program 14 times [2023-08-30 19:00:57,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:57,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754873758] [2023-08-30 19:00:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:57,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:57,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:57,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754873758] [2023-08-30 19:00:57,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754873758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:57,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855039298] [2023-08-30 19:00:57,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:00:57,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:57,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:57,865 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:57,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 19:00:57,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:00:57,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:57,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 19:00:57,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:58,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-08-30 19:00:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:58,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:58,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:58,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-08-30 19:00:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:58,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855039298] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:58,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:58,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-08-30 19:00:58,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886777634] [2023-08-30 19:00:58,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:58,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:00:58,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:58,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:00:58,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:00:59,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-30 19:00:59,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 440 transitions, 8445 flow. Second operand has 17 states, 17 states have (on average 209.23529411764707) internal successors, (3557), 17 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:59,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:59,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-30 19:00:59,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:00,581 INFO L130 PetriNetUnfolder]: 1666/3695 cut-off events. [2023-08-30 19:01:00,581 INFO L131 PetriNetUnfolder]: For 45512/45512 co-relation queries the response was YES. [2023-08-30 19:01:00,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25608 conditions, 3695 events. 1666/3695 cut-off events. For 45512/45512 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29995 event pairs, 375 based on Foata normal form. 12/3707 useless extension candidates. Maximal degree in co-relation 25502. Up to 1278 conditions per place. [2023-08-30 19:01:00,609 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 304 selfloop transitions, 195 changer transitions 0/499 dead transitions. [2023-08-30 19:01:00,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 499 transitions, 9958 flow [2023-08-30 19:01:00,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:01:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:01:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2986 transitions. [2023-08-30 19:01:00,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3795119471276055 [2023-08-30 19:01:00,612 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2986 transitions. [2023-08-30 19:01:00,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2986 transitions. [2023-08-30 19:01:00,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:00,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2986 transitions. [2023-08-30 19:01:00,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 213.28571428571428) internal successors, (2986), 14 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:00,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:00,620 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:00,620 INFO L175 Difference]: Start difference. First operand has 276 places, 440 transitions, 8445 flow. Second operand 14 states and 2986 transitions. [2023-08-30 19:01:00,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 499 transitions, 9958 flow [2023-08-30 19:01:00,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 499 transitions, 9783 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-30 19:01:00,994 INFO L231 Difference]: Finished difference. Result has 278 places, 444 transitions, 8751 flow [2023-08-30 19:01:00,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8751, PETRI_PLACES=278, PETRI_TRANSITIONS=444} [2023-08-30 19:01:00,994 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-08-30 19:01:00,994 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 444 transitions, 8751 flow [2023-08-30 19:01:00,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 209.23529411764707) internal successors, (3557), 17 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:00,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:00,995 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:01,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:01,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:01,197 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:01,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:01,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2050404756, now seen corresponding path program 15 times [2023-08-30 19:01:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:01,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884338524] [2023-08-30 19:01:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:01,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:01:01,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:01,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884338524] [2023-08-30 19:01:01,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884338524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:01,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141255621] [2023-08-30 19:01:01,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:01:01,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:01,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:01,781 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:01,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 19:01:01,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:01:01,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:01,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 19:01:01,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:02,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2023-08-30 19:01:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:02,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:02,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:02,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 47 [2023-08-30 19:01:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:02,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141255621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:02,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:02,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-08-30 19:01:02,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117290696] [2023-08-30 19:01:02,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:02,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 19:01:02,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 19:01:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-08-30 19:01:03,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 562 [2023-08-30 19:01:03,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 444 transitions, 8751 flow. Second operand has 23 states, 23 states have (on average 198.95652173913044) internal successors, (4576), 23 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:03,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:03,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 562 [2023-08-30 19:01:03,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:05,401 INFO L130 PetriNetUnfolder]: 1654/3651 cut-off events. [2023-08-30 19:01:05,401 INFO L131 PetriNetUnfolder]: For 48293/48293 co-relation queries the response was YES. [2023-08-30 19:01:05,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25810 conditions, 3651 events. 1654/3651 cut-off events. For 48293/48293 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29318 event pairs, 267 based on Foata normal form. 24/3675 useless extension candidates. Maximal degree in co-relation 25704. Up to 691 conditions per place. [2023-08-30 19:01:05,428 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 460 selfloop transitions, 259 changer transitions 2/721 dead transitions. [2023-08-30 19:01:05,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 721 transitions, 13789 flow [2023-08-30 19:01:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 19:01:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 19:01:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5654 transitions. [2023-08-30 19:01:05,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35930350788002036 [2023-08-30 19:01:05,433 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5654 transitions. [2023-08-30 19:01:05,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5654 transitions. [2023-08-30 19:01:05,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:05,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5654 transitions. [2023-08-30 19:01:05,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 201.92857142857142) internal successors, (5654), 28 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:05,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:05,447 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:05,448 INFO L175 Difference]: Start difference. First operand has 278 places, 444 transitions, 8751 flow. Second operand 28 states and 5654 transitions. [2023-08-30 19:01:05,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 721 transitions, 13789 flow [2023-08-30 19:01:05,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 721 transitions, 13367 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-08-30 19:01:05,788 INFO L231 Difference]: Finished difference. Result has 294 places, 515 transitions, 10243 flow [2023-08-30 19:01:05,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=8236, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10243, PETRI_PLACES=294, PETRI_TRANSITIONS=515} [2023-08-30 19:01:05,789 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2023-08-30 19:01:05,789 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 515 transitions, 10243 flow [2023-08-30 19:01:05,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 198.95652173913044) internal successors, (4576), 23 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:05,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:05,790 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:05,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-30 19:01:05,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:05,991 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:05,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:05,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1594385250, now seen corresponding path program 16 times [2023-08-30 19:01:05,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:05,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452309117] [2023-08-30 19:01:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:05,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:01:06,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:06,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452309117] [2023-08-30 19:01:06,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452309117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:06,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170149527] [2023-08-30 19:01:06,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:01:06,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:06,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:06,619 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:06,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 19:01:06,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:01:06,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:06,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:01:06,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:07,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 48 [2023-08-30 19:01:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:07,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:07,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:07,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 69 [2023-08-30 19:01:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:07,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170149527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:07,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:07,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2023-08-30 19:01:07,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162823951] [2023-08-30 19:01:07,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:07,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 19:01:07,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 19:01:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-30 19:01:08,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 562 [2023-08-30 19:01:08,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 515 transitions, 10243 flow. Second operand has 24 states, 24 states have (on average 201.0) internal successors, (4824), 24 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:08,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:08,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 562 [2023-08-30 19:01:08,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:09,674 INFO L130 PetriNetUnfolder]: 1610/3547 cut-off events. [2023-08-30 19:01:09,674 INFO L131 PetriNetUnfolder]: For 49090/49090 co-relation queries the response was YES. [2023-08-30 19:01:09,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25529 conditions, 3547 events. 1610/3547 cut-off events. For 49090/49090 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28326 event pairs, 721 based on Foata normal form. 8/3555 useless extension candidates. Maximal degree in co-relation 25418. Up to 3296 conditions per place. [2023-08-30 19:01:09,705 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 433 selfloop transitions, 82 changer transitions 10/525 dead transitions. [2023-08-30 19:01:09,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 525 transitions, 11303 flow [2023-08-30 19:01:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:01:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:01:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2237 transitions. [2023-08-30 19:01:09,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36185700420575867 [2023-08-30 19:01:09,707 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2237 transitions. [2023-08-30 19:01:09,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2237 transitions. [2023-08-30 19:01:09,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:09,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2237 transitions. [2023-08-30 19:01:09,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:09,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:09,712 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:09,713 INFO L175 Difference]: Start difference. First operand has 294 places, 515 transitions, 10243 flow. Second operand 11 states and 2237 transitions. [2023-08-30 19:01:09,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 525 transitions, 11303 flow [2023-08-30 19:01:10,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 525 transitions, 11051 flow, removed 37 selfloop flow, removed 16 redundant places. [2023-08-30 19:01:10,176 INFO L231 Difference]: Finished difference. Result has 288 places, 505 transitions, 9993 flow [2023-08-30 19:01:10,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9909, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9993, PETRI_PLACES=288, PETRI_TRANSITIONS=505} [2023-08-30 19:01:10,177 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2023-08-30 19:01:10,177 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 505 transitions, 9993 flow [2023-08-30 19:01:10,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 201.0) internal successors, (4824), 24 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:10,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:10,178 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:10,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:10,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:10,381 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:10,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:10,381 INFO L85 PathProgramCache]: Analyzing trace with hash -86174668, now seen corresponding path program 17 times [2023-08-30 19:01:10,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:10,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82500788] [2023-08-30 19:01:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:10,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:10,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:10,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82500788] [2023-08-30 19:01:10,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82500788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:10,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106010511] [2023-08-30 19:01:10,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:01:10,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:10,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:10,796 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:10,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 19:01:10,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:01:10,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:10,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 19:01:10,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:11,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2023-08-30 19:01:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:11,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:11,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:11,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 42 [2023-08-30 19:01:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:11,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106010511] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:11,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:11,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 19:01:11,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243453310] [2023-08-30 19:01:11,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:11,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:01:11,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:11,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:01:11,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:01:12,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-30 19:01:12,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 505 transitions, 9993 flow. Second operand has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:12,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:12,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-30 19:01:12,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:13,488 INFO L130 PetriNetUnfolder]: 1664/3685 cut-off events. [2023-08-30 19:01:13,488 INFO L131 PetriNetUnfolder]: For 49457/49457 co-relation queries the response was YES. [2023-08-30 19:01:13,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26534 conditions, 3685 events. 1664/3685 cut-off events. For 49457/49457 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29781 event pairs, 267 based on Foata normal form. 16/3701 useless extension candidates. Maximal degree in co-relation 26427. Up to 1161 conditions per place. [2023-08-30 19:01:13,513 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 297 selfloop transitions, 265 changer transitions 1/563 dead transitions. [2023-08-30 19:01:13,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 563 transitions, 11867 flow [2023-08-30 19:01:13,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 19:01:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 19:01:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2543 transitions. [2023-08-30 19:01:13,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37707591933570583 [2023-08-30 19:01:13,515 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2543 transitions. [2023-08-30 19:01:13,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2543 transitions. [2023-08-30 19:01:13,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:13,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2543 transitions. [2023-08-30 19:01:13,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 211.91666666666666) internal successors, (2543), 12 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:13,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:13,521 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:13,521 INFO L175 Difference]: Start difference. First operand has 288 places, 505 transitions, 9993 flow. Second operand 12 states and 2543 transitions. [2023-08-30 19:01:13,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 563 transitions, 11867 flow [2023-08-30 19:01:13,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 563 transitions, 11697 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 19:01:13,864 INFO L231 Difference]: Finished difference. Result has 285 places, 520 transitions, 10782 flow [2023-08-30 19:01:13,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9739, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10782, PETRI_PLACES=285, PETRI_TRANSITIONS=520} [2023-08-30 19:01:13,865 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-08-30 19:01:13,865 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 520 transitions, 10782 flow [2023-08-30 19:01:13,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:13,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:13,865 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:13,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:14,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 19:01:14,071 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:14,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash 450395604, now seen corresponding path program 18 times [2023-08-30 19:01:14,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:14,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858541302] [2023-08-30 19:01:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:14,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:14,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:14,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858541302] [2023-08-30 19:01:14,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858541302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:14,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416900213] [2023-08-30 19:01:14,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:01:14,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:14,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:14,477 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:14,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 19:01:14,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:01:14,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:14,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:01:14,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:14,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2023-08-30 19:01:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:14,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:15,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:15,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-30 19:01:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:15,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416900213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:15,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:15,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-30 19:01:15,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946957142] [2023-08-30 19:01:15,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:15,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:01:15,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:15,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:01:15,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:01:15,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-30 19:01:15,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 520 transitions, 10782 flow. Second operand has 19 states, 19 states have (on average 209.26315789473685) internal successors, (3976), 19 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:15,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:15,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-30 19:01:15,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:16,805 INFO L130 PetriNetUnfolder]: 1620/3545 cut-off events. [2023-08-30 19:01:16,805 INFO L131 PetriNetUnfolder]: For 53008/53008 co-relation queries the response was YES. [2023-08-30 19:01:16,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26476 conditions, 3545 events. 1620/3545 cut-off events. For 53008/53008 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28137 event pairs, 733 based on Foata normal form. 20/3565 useless extension candidates. Maximal degree in co-relation 26369. Up to 3315 conditions per place. [2023-08-30 19:01:16,893 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 440 selfloop transitions, 82 changer transitions 0/522 dead transitions. [2023-08-30 19:01:16,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 522 transitions, 11724 flow [2023-08-30 19:01:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:01:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:01:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1696 transitions. [2023-08-30 19:01:16,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37722419928825623 [2023-08-30 19:01:16,896 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1696 transitions. [2023-08-30 19:01:16,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1696 transitions. [2023-08-30 19:01:16,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:16,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1696 transitions. [2023-08-30 19:01:16,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:16,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:16,900 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:16,900 INFO L175 Difference]: Start difference. First operand has 285 places, 520 transitions, 10782 flow. Second operand 8 states and 1696 transitions. [2023-08-30 19:01:16,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 522 transitions, 11724 flow [2023-08-30 19:01:17,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 522 transitions, 11255 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-08-30 19:01:17,231 INFO L231 Difference]: Finished difference. Result has 283 places, 512 transitions, 10327 flow [2023-08-30 19:01:17,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10033, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10327, PETRI_PLACES=283, PETRI_TRANSITIONS=512} [2023-08-30 19:01:17,232 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 262 predicate places. [2023-08-30 19:01:17,232 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 512 transitions, 10327 flow [2023-08-30 19:01:17,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 209.26315789473685) internal successors, (3976), 19 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:17,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:17,233 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:17,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:17,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-30 19:01:17,433 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:17,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash 801329013, now seen corresponding path program 19 times [2023-08-30 19:01:17,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:17,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156653659] [2023-08-30 19:01:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:17,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:17,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:17,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156653659] [2023-08-30 19:01:17,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156653659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:17,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319293919] [2023-08-30 19:01:17,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:01:17,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:17,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:17,763 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:17,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 19:01:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:17,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 19:01:17,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:18,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2023-08-30 19:01:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:18,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:18,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:18,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2023-08-30 19:01:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:18,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319293919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:18,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:18,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 19:01:18,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524094501] [2023-08-30 19:01:18,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:18,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:01:18,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:18,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:01:18,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:01:18,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-30 19:01:18,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 512 transitions, 10327 flow. Second operand has 18 states, 18 states have (on average 208.05555555555554) internal successors, (3745), 18 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:18,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:18,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-30 19:01:18,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:19,980 INFO L130 PetriNetUnfolder]: 1608/3501 cut-off events. [2023-08-30 19:01:19,980 INFO L131 PetriNetUnfolder]: For 49239/49239 co-relation queries the response was YES. [2023-08-30 19:01:19,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25707 conditions, 3501 events. 1608/3501 cut-off events. For 49239/49239 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27571 event pairs, 463 based on Foata normal form. 4/3505 useless extension candidates. Maximal degree in co-relation 25599. Up to 2377 conditions per place. [2023-08-30 19:01:20,010 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 372 selfloop transitions, 155 changer transitions 0/527 dead transitions. [2023-08-30 19:01:20,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 527 transitions, 11368 flow [2023-08-30 19:01:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:01:20,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:01:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2321 transitions. [2023-08-30 19:01:20,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37544483985765126 [2023-08-30 19:01:20,013 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2321 transitions. [2023-08-30 19:01:20,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2321 transitions. [2023-08-30 19:01:20,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:20,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2321 transitions. [2023-08-30 19:01:20,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 211.0) internal successors, (2321), 11 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:20,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:20,018 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:20,018 INFO L175 Difference]: Start difference. First operand has 283 places, 512 transitions, 10327 flow. Second operand 11 states and 2321 transitions. [2023-08-30 19:01:20,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 527 transitions, 11368 flow [2023-08-30 19:01:20,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 527 transitions, 11235 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-30 19:01:20,356 INFO L231 Difference]: Finished difference. Result has 286 places, 508 transitions, 10428 flow [2023-08-30 19:01:20,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10118, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10428, PETRI_PLACES=286, PETRI_TRANSITIONS=508} [2023-08-30 19:01:20,357 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 265 predicate places. [2023-08-30 19:01:20,357 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 508 transitions, 10428 flow [2023-08-30 19:01:20,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 208.05555555555554) internal successors, (3745), 18 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:20,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:20,358 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:20,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-30 19:01:20,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:20,559 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:20,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:20,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1868073493, now seen corresponding path program 20 times [2023-08-30 19:01:20,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:20,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520167740] [2023-08-30 19:01:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:20,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:01:21,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:21,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520167740] [2023-08-30 19:01:21,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520167740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:21,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595138524] [2023-08-30 19:01:21,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:01:21,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:21,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:21,169 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:21,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 19:01:21,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:01:21,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:21,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:01:21,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:21,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-08-30 19:01:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:21,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:21,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:21,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-30 19:01:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:21,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595138524] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:21,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:21,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-08-30 19:01:21,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52157098] [2023-08-30 19:01:21,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:21,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 19:01:21,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:21,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 19:01:21,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-08-30 19:01:22,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 562 [2023-08-30 19:01:22,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 508 transitions, 10428 flow. Second operand has 23 states, 23 states have (on average 200.91304347826087) internal successors, (4621), 23 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:22,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:22,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 562 [2023-08-30 19:01:22,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:24,279 INFO L130 PetriNetUnfolder]: 1658/3639 cut-off events. [2023-08-30 19:01:24,279 INFO L131 PetriNetUnfolder]: For 54497/54497 co-relation queries the response was YES. [2023-08-30 19:01:24,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27126 conditions, 3639 events. 1658/3639 cut-off events. For 54497/54497 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29189 event pairs, 639 based on Foata normal form. 16/3655 useless extension candidates. Maximal degree in co-relation 27019. Up to 3084 conditions per place. [2023-08-30 19:01:24,314 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 458 selfloop transitions, 108 changer transitions 0/566 dead transitions. [2023-08-30 19:01:24,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 566 transitions, 12091 flow [2023-08-30 19:01:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:01:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:01:24,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2866 transitions. [2023-08-30 19:01:24,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36426029486527706 [2023-08-30 19:01:24,316 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2866 transitions. [2023-08-30 19:01:24,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2866 transitions. [2023-08-30 19:01:24,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:24,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2866 transitions. [2023-08-30 19:01:24,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 204.71428571428572) internal successors, (2866), 14 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:24,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:24,323 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:24,323 INFO L175 Difference]: Start difference. First operand has 286 places, 508 transitions, 10428 flow. Second operand 14 states and 2866 transitions. [2023-08-30 19:01:24,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 566 transitions, 12091 flow [2023-08-30 19:01:24,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 566 transitions, 11893 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-08-30 19:01:24,759 INFO L231 Difference]: Finished difference. Result has 292 places, 518 transitions, 10716 flow [2023-08-30 19:01:24,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10162, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10716, PETRI_PLACES=292, PETRI_TRANSITIONS=518} [2023-08-30 19:01:24,759 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 271 predicate places. [2023-08-30 19:01:24,760 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 518 transitions, 10716 flow [2023-08-30 19:01:24,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 200.91304347826087) internal successors, (4621), 23 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:24,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:24,760 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:24,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:24,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:24,961 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:24,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:24,961 INFO L85 PathProgramCache]: Analyzing trace with hash -494622950, now seen corresponding path program 21 times [2023-08-30 19:01:24,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:24,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980056949] [2023-08-30 19:01:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:24,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:25,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:25,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980056949] [2023-08-30 19:01:25,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980056949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:25,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340850328] [2023-08-30 19:01:25,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:01:25,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:25,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:25,321 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:25,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 19:01:25,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:01:25,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:25,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 19:01:25,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:25,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 91 [2023-08-30 19:01:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:25,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:26,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:26,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-30 19:01:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:26,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340850328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:26,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:26,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 19:01:26,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269261595] [2023-08-30 19:01:26,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:26,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:01:26,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:26,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:01:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:01:26,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-30 19:01:26,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 518 transitions, 10716 flow. Second operand has 18 states, 18 states have (on average 209.27777777777777) internal successors, (3767), 18 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:26,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:26,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-30 19:01:26,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:27,713 INFO L130 PetriNetUnfolder]: 1698/3775 cut-off events. [2023-08-30 19:01:27,714 INFO L131 PetriNetUnfolder]: For 59878/59878 co-relation queries the response was YES. [2023-08-30 19:01:27,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28252 conditions, 3775 events. 1698/3775 cut-off events. For 59878/59878 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30886 event pairs, 689 based on Foata normal form. 24/3799 useless extension candidates. Maximal degree in co-relation 28141. Up to 3271 conditions per place. [2023-08-30 19:01:27,750 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 438 selfloop transitions, 114 changer transitions 5/557 dead transitions. [2023-08-30 19:01:27,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 557 transitions, 12420 flow [2023-08-30 19:01:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:01:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:01:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2332 transitions. [2023-08-30 19:01:27,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37722419928825623 [2023-08-30 19:01:27,752 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2332 transitions. [2023-08-30 19:01:27,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2332 transitions. [2023-08-30 19:01:27,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:27,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2332 transitions. [2023-08-30 19:01:27,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 212.0) internal successors, (2332), 11 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:27,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:27,757 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:27,757 INFO L175 Difference]: Start difference. First operand has 292 places, 518 transitions, 10716 flow. Second operand 11 states and 2332 transitions. [2023-08-30 19:01:27,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 557 transitions, 12420 flow [2023-08-30 19:01:28,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 557 transitions, 12221 flow, removed 51 selfloop flow, removed 7 redundant places. [2023-08-30 19:01:28,172 INFO L231 Difference]: Finished difference. Result has 297 places, 530 transitions, 11174 flow [2023-08-30 19:01:28,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10487, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11174, PETRI_PLACES=297, PETRI_TRANSITIONS=530} [2023-08-30 19:01:28,173 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 276 predicate places. [2023-08-30 19:01:28,173 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 530 transitions, 11174 flow [2023-08-30 19:01:28,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 209.27777777777777) internal successors, (3767), 18 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:28,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:28,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:28,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:28,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 19:01:28,380 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:28,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash 202279714, now seen corresponding path program 22 times [2023-08-30 19:01:28,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:28,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389509495] [2023-08-30 19:01:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:28,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:28,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389509495] [2023-08-30 19:01:28,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389509495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:28,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291687008] [2023-08-30 19:01:28,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:01:28,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:28,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:28,778 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:28,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 19:01:28,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:01:28,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:28,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 19:01:28,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:29,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2023-08-30 19:01:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:29,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:29,349 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 19:01:29,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2023-08-30 19:01:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:29,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291687008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:29,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:29,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-08-30 19:01:29,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015744894] [2023-08-30 19:01:29,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:29,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:01:29,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:29,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:01:29,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:01:30,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-30 19:01:30,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 530 transitions, 11174 flow. Second operand has 17 states, 17 states have (on average 209.2941176470588) internal successors, (3558), 17 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:30,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:30,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-30 19:01:30,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:31,471 INFO L130 PetriNetUnfolder]: 1772/3925 cut-off events. [2023-08-30 19:01:31,471 INFO L131 PetriNetUnfolder]: For 60235/60235 co-relation queries the response was YES. [2023-08-30 19:01:31,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29498 conditions, 3925 events. 1772/3925 cut-off events. For 60235/60235 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32314 event pairs, 82 based on Foata normal form. 24/3949 useless extension candidates. Maximal degree in co-relation 29385. Up to 1276 conditions per place. [2023-08-30 19:01:31,500 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 317 selfloop transitions, 289 changer transitions 3/609 dead transitions. [2023-08-30 19:01:31,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 609 transitions, 13470 flow [2023-08-30 19:01:31,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 19:01:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 19:01:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2557 transitions. [2023-08-30 19:01:31,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791518386714116 [2023-08-30 19:01:31,503 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2557 transitions. [2023-08-30 19:01:31,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2557 transitions. [2023-08-30 19:01:31,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:31,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2557 transitions. [2023-08-30 19:01:31,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 213.08333333333334) internal successors, (2557), 12 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:31,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:31,508 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:31,508 INFO L175 Difference]: Start difference. First operand has 297 places, 530 transitions, 11174 flow. Second operand 12 states and 2557 transitions. [2023-08-30 19:01:31,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 609 transitions, 13470 flow [2023-08-30 19:01:31,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 609 transitions, 13209 flow, removed 31 selfloop flow, removed 8 redundant places. [2023-08-30 19:01:31,979 INFO L231 Difference]: Finished difference. Result has 300 places, 551 transitions, 12098 flow [2023-08-30 19:01:31,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10913, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12098, PETRI_PLACES=300, PETRI_TRANSITIONS=551} [2023-08-30 19:01:31,981 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 279 predicate places. [2023-08-30 19:01:31,981 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 551 transitions, 12098 flow [2023-08-30 19:01:31,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 209.2941176470588) internal successors, (3558), 17 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:31,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:31,981 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:31,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:32,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 19:01:32,182 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:32,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:32,183 INFO L85 PathProgramCache]: Analyzing trace with hash 222542276, now seen corresponding path program 23 times [2023-08-30 19:01:32,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:32,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13473556] [2023-08-30 19:01:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:32,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:32,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:32,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13473556] [2023-08-30 19:01:32,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13473556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:32,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098442187] [2023-08-30 19:01:32,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:01:32,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:32,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:32,582 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:32,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 19:01:32,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:01:32,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 19:01:32,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:33,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-08-30 19:01:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:33,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:33,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:33,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-08-30 19:01:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:33,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098442187] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:33,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:33,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-30 19:01:33,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478192856] [2023-08-30 19:01:33,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:33,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:01:33,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:33,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:01:33,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:01:34,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-30 19:01:34,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 551 transitions, 12098 flow. Second operand has 19 states, 19 states have (on average 208.05263157894737) internal successors, (3953), 19 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:34,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:34,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-30 19:01:34,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:36,373 INFO L130 PetriNetUnfolder]: 1778/3935 cut-off events. [2023-08-30 19:01:36,374 INFO L131 PetriNetUnfolder]: For 64668/64668 co-relation queries the response was YES. [2023-08-30 19:01:36,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30505 conditions, 3935 events. 1778/3935 cut-off events. For 64668/64668 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32581 event pairs, 38 based on Foata normal form. 16/3951 useless extension candidates. Maximal degree in co-relation 30391. Up to 948 conditions per place. [2023-08-30 19:01:36,404 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 338 selfloop transitions, 315 changer transitions 0/653 dead transitions. [2023-08-30 19:01:36,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 653 transitions, 14610 flow [2023-08-30 19:01:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 19:01:36,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 19:01:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 5272 transitions. [2023-08-30 19:01:36,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37523131672597865 [2023-08-30 19:01:36,408 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 5272 transitions. [2023-08-30 19:01:36,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 5272 transitions. [2023-08-30 19:01:36,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:36,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 5272 transitions. [2023-08-30 19:01:36,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 210.88) internal successors, (5272), 25 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:36,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 562.0) internal successors, (14612), 26 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:36,419 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 562.0) internal successors, (14612), 26 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:36,419 INFO L175 Difference]: Start difference. First operand has 300 places, 551 transitions, 12098 flow. Second operand 25 states and 5272 transitions. [2023-08-30 19:01:36,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 653 transitions, 14610 flow [2023-08-30 19:01:36,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 653 transitions, 14329 flow, removed 54 selfloop flow, removed 5 redundant places. [2023-08-30 19:01:37,003 INFO L231 Difference]: Finished difference. Result has 323 places, 577 transitions, 13320 flow [2023-08-30 19:01:37,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=11807, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13320, PETRI_PLACES=323, PETRI_TRANSITIONS=577} [2023-08-30 19:01:37,005 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 302 predicate places. [2023-08-30 19:01:37,005 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 577 transitions, 13320 flow [2023-08-30 19:01:37,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 208.05263157894737) internal successors, (3953), 19 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:37,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:37,006 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:37,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:37,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 19:01:37,212 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:37,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash -632764378, now seen corresponding path program 24 times [2023-08-30 19:01:37,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:37,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348584689] [2023-08-30 19:01:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:37,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:37,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:37,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348584689] [2023-08-30 19:01:37,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348584689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:37,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256862177] [2023-08-30 19:01:37,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:01:37,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:37,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:37,532 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:37,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 19:01:37,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:01:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:37,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:01:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:37,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-30 19:01:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:37,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:38,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:38,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-08-30 19:01:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:38,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256862177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:38,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:38,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 19:01:38,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156010792] [2023-08-30 19:01:38,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:38,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:01:38,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:38,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:01:38,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:01:38,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-30 19:01:38,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 577 transitions, 13320 flow. Second operand has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:38,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:38,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-30 19:01:38,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:40,150 INFO L130 PetriNetUnfolder]: 1766/3855 cut-off events. [2023-08-30 19:01:40,151 INFO L131 PetriNetUnfolder]: For 68093/68093 co-relation queries the response was YES. [2023-08-30 19:01:40,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31644 conditions, 3855 events. 1766/3855 cut-off events. For 68093/68093 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 31320 event pairs, 74 based on Foata normal form. 20/3875 useless extension candidates. Maximal degree in co-relation 31527. Up to 2058 conditions per place. [2023-08-30 19:01:40,182 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 387 selfloop transitions, 217 changer transitions 0/604 dead transitions. [2023-08-30 19:01:40,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 604 transitions, 14747 flow [2023-08-30 19:01:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:01:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:01:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2116 transitions. [2023-08-30 19:01:40,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37651245551601425 [2023-08-30 19:01:40,184 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2116 transitions. [2023-08-30 19:01:40,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2116 transitions. [2023-08-30 19:01:40,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:40,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2116 transitions. [2023-08-30 19:01:40,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 211.6) internal successors, (2116), 10 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:40,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:40,188 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:40,188 INFO L175 Difference]: Start difference. First operand has 323 places, 577 transitions, 13320 flow. Second operand 10 states and 2116 transitions. [2023-08-30 19:01:40,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 604 transitions, 14747 flow [2023-08-30 19:01:40,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 604 transitions, 13886 flow, removed 159 selfloop flow, removed 23 redundant places. [2023-08-30 19:01:40,804 INFO L231 Difference]: Finished difference. Result has 308 places, 573 transitions, 12912 flow [2023-08-30 19:01:40,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12058, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12912, PETRI_PLACES=308, PETRI_TRANSITIONS=573} [2023-08-30 19:01:40,805 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-08-30 19:01:40,805 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 573 transitions, 12912 flow [2023-08-30 19:01:40,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:40,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:40,806 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:40,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:41,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:41,009 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:41,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:41,009 INFO L85 PathProgramCache]: Analyzing trace with hash 937006002, now seen corresponding path program 25 times [2023-08-30 19:01:41,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:41,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825149652] [2023-08-30 19:01:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:41,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:01:41,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:41,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825149652] [2023-08-30 19:01:41,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825149652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:41,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363588615] [2023-08-30 19:01:41,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:01:41,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:41,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:41,558 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:41,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 19:01:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:41,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 19:01:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:41,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 65 [2023-08-30 19:01:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:41,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:42,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:42,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 38 [2023-08-30 19:01:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:42,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363588615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:42,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:42,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 21 [2023-08-30 19:01:42,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829784432] [2023-08-30 19:01:42,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:42,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:01:42,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:01:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:01:43,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 562 [2023-08-30 19:01:43,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 573 transitions, 12912 flow. Second operand has 21 states, 21 states have (on average 202.0) internal successors, (4242), 21 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:43,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:43,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 562 [2023-08-30 19:01:43,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:44,583 INFO L130 PetriNetUnfolder]: 1786/3867 cut-off events. [2023-08-30 19:01:44,584 INFO L131 PetriNetUnfolder]: For 66159/66159 co-relation queries the response was YES. [2023-08-30 19:01:44,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31108 conditions, 3867 events. 1786/3867 cut-off events. For 66159/66159 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31135 event pairs, 349 based on Foata normal form. 24/3891 useless extension candidates. Maximal degree in co-relation 31001. Up to 1532 conditions per place. [2023-08-30 19:01:44,618 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 386 selfloop transitions, 221 changer transitions 1/608 dead transitions. [2023-08-30 19:01:44,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 608 transitions, 14493 flow [2023-08-30 19:01:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:01:44,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:01:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2659 transitions. [2023-08-30 19:01:44,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394744045989597 [2023-08-30 19:01:44,620 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2659 transitions. [2023-08-30 19:01:44,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2659 transitions. [2023-08-30 19:01:44,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:44,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2659 transitions. [2023-08-30 19:01:44,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 204.53846153846155) internal successors, (2659), 13 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:44,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:44,628 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:44,628 INFO L175 Difference]: Start difference. First operand has 308 places, 573 transitions, 12912 flow. Second operand 13 states and 2659 transitions. [2023-08-30 19:01:44,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 608 transitions, 14493 flow [2023-08-30 19:01:45,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 608 transitions, 14062 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-30 19:01:45,225 INFO L231 Difference]: Finished difference. Result has 313 places, 577 transitions, 13031 flow [2023-08-30 19:01:45,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12421, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13031, PETRI_PLACES=313, PETRI_TRANSITIONS=577} [2023-08-30 19:01:45,225 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2023-08-30 19:01:45,226 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 577 transitions, 13031 flow [2023-08-30 19:01:45,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 202.0) internal successors, (4242), 21 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:45,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:45,226 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:45,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:45,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:45,427 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:45,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:45,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1238315755, now seen corresponding path program 26 times [2023-08-30 19:01:45,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:45,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608782835] [2023-08-30 19:01:45,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:45,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:45,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:45,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608782835] [2023-08-30 19:01:45,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608782835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:45,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799569745] [2023-08-30 19:01:45,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:01:45,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:45,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:45,729 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:45,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 19:01:45,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:01:45,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:45,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 19:01:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:46,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-08-30 19:01:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:46,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:46,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:46,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 55 [2023-08-30 19:01:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:46,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799569745] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:46,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:46,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 19:01:46,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822654467] [2023-08-30 19:01:46,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:46,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:01:46,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:01:46,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:01:47,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-30 19:01:47,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 577 transitions, 13031 flow. Second operand has 18 states, 18 states have (on average 208.05555555555554) internal successors, (3745), 18 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:47,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:47,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-30 19:01:47,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:48,180 INFO L130 PetriNetUnfolder]: 1774/3823 cut-off events. [2023-08-30 19:01:48,181 INFO L131 PetriNetUnfolder]: For 68701/68701 co-relation queries the response was YES. [2023-08-30 19:01:48,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30936 conditions, 3823 events. 1774/3823 cut-off events. For 68701/68701 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30611 event pairs, 749 based on Foata normal form. 4/3827 useless extension candidates. Maximal degree in co-relation 30827. Up to 3467 conditions per place. [2023-08-30 19:01:48,211 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 499 selfloop transitions, 92 changer transitions 0/591 dead transitions. [2023-08-30 19:01:48,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 591 transitions, 14198 flow [2023-08-30 19:01:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:01:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:01:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2111 transitions. [2023-08-30 19:01:48,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37562277580071174 [2023-08-30 19:01:48,213 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2111 transitions. [2023-08-30 19:01:48,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2111 transitions. [2023-08-30 19:01:48,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:48,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2111 transitions. [2023-08-30 19:01:48,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 211.1) internal successors, (2111), 10 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:48,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:48,217 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:48,217 INFO L175 Difference]: Start difference. First operand has 313 places, 577 transitions, 13031 flow. Second operand 10 states and 2111 transitions. [2023-08-30 19:01:48,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 591 transitions, 14198 flow [2023-08-30 19:01:48,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 591 transitions, 13948 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-08-30 19:01:48,652 INFO L231 Difference]: Finished difference. Result has 311 places, 573 transitions, 12880 flow [2023-08-30 19:01:48,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12696, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12880, PETRI_PLACES=311, PETRI_TRANSITIONS=573} [2023-08-30 19:01:48,653 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 290 predicate places. [2023-08-30 19:01:48,653 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 573 transitions, 12880 flow [2023-08-30 19:01:48,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 208.05555555555554) internal successors, (3745), 18 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:48,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:48,654 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:48,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:48,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:48,854 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:48,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:48,855 INFO L85 PathProgramCache]: Analyzing trace with hash 852990556, now seen corresponding path program 27 times [2023-08-30 19:01:48,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:48,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464985816] [2023-08-30 19:01:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:48,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:49,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:49,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464985816] [2023-08-30 19:01:49,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464985816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:49,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574623662] [2023-08-30 19:01:49,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:01:49,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:49,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:49,233 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:49,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 19:01:49,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:01:49,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:49,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:01:49,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:49,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-08-30 19:01:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:49,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:49,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:49,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-30 19:01:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:49,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574623662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:49,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:49,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-30 19:01:49,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774951863] [2023-08-30 19:01:49,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:49,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:01:49,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:01:49,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:01:50,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-30 19:01:50,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 573 transitions, 12880 flow. Second operand has 20 states, 20 states have (on average 209.15) internal successors, (4183), 20 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:50,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:50,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-30 19:01:50,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:51,837 INFO L130 PetriNetUnfolder]: 1766/3759 cut-off events. [2023-08-30 19:01:51,838 INFO L131 PetriNetUnfolder]: For 66182/66182 co-relation queries the response was YES. [2023-08-30 19:01:51,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30583 conditions, 3759 events. 1766/3759 cut-off events. For 66182/66182 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29660 event pairs, 711 based on Foata normal form. 16/3775 useless extension candidates. Maximal degree in co-relation 30475. Up to 3341 conditions per place. [2023-08-30 19:01:51,864 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 470 selfloop transitions, 116 changer transitions 0/586 dead transitions. [2023-08-30 19:01:51,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 586 transitions, 14088 flow [2023-08-30 19:01:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:01:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:01:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2117 transitions. [2023-08-30 19:01:51,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669039145907474 [2023-08-30 19:01:51,866 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2117 transitions. [2023-08-30 19:01:51,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2117 transitions. [2023-08-30 19:01:51,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:51,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2117 transitions. [2023-08-30 19:01:51,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 211.7) internal successors, (2117), 10 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:51,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:51,872 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:51,872 INFO L175 Difference]: Start difference. First operand has 311 places, 573 transitions, 12880 flow. Second operand 10 states and 2117 transitions. [2023-08-30 19:01:51,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 586 transitions, 14088 flow [2023-08-30 19:01:52,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 586 transitions, 13896 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-08-30 19:01:52,298 INFO L231 Difference]: Finished difference. Result has 310 places, 569 transitions, 12806 flow [2023-08-30 19:01:52,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12415, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12806, PETRI_PLACES=310, PETRI_TRANSITIONS=569} [2023-08-30 19:01:52,299 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 289 predicate places. [2023-08-30 19:01:52,299 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 569 transitions, 12806 flow [2023-08-30 19:01:52,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 209.15) internal successors, (4183), 20 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:52,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:52,300 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:52,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:52,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 19:01:52,500 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:52,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:52,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1108262019, now seen corresponding path program 28 times [2023-08-30 19:01:52,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:52,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583659812] [2023-08-30 19:01:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:52,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:01:53,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:53,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583659812] [2023-08-30 19:01:53,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583659812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:53,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203548546] [2023-08-30 19:01:53,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:01:53,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:53,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:53,038 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:53,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 19:01:53,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:01:53,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:53,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:01:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:53,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-08-30 19:01:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:53,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:53,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:53,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 69 [2023-08-30 19:01:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:53,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203548546] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:53,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:53,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2023-08-30 19:01:53,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077490797] [2023-08-30 19:01:53,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:53,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 19:01:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 19:01:53,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-08-30 19:01:54,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 562 [2023-08-30 19:01:54,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 569 transitions, 12806 flow. Second operand has 24 states, 24 states have (on average 202.83333333333334) internal successors, (4868), 24 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:54,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:54,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 562 [2023-08-30 19:01:54,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:56,318 INFO L130 PetriNetUnfolder]: 1740/3681 cut-off events. [2023-08-30 19:01:56,318 INFO L131 PetriNetUnfolder]: For 64024/64024 co-relation queries the response was YES. [2023-08-30 19:01:56,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30281 conditions, 3681 events. 1740/3681 cut-off events. For 64024/64024 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28827 event pairs, 476 based on Foata normal form. 12/3693 useless extension candidates. Maximal degree in co-relation 30173. Up to 2305 conditions per place. [2023-08-30 19:01:56,351 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 423 selfloop transitions, 175 changer transitions 3/601 dead transitions. [2023-08-30 19:01:56,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 601 transitions, 14190 flow [2023-08-30 19:01:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:01:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:01:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2683 transitions. [2023-08-30 19:01:56,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3672324117163975 [2023-08-30 19:01:56,354 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2683 transitions. [2023-08-30 19:01:56,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2683 transitions. [2023-08-30 19:01:56,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:56,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2683 transitions. [2023-08-30 19:01:56,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 206.3846153846154) internal successors, (2683), 13 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:56,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:56,361 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:56,361 INFO L175 Difference]: Start difference. First operand has 310 places, 569 transitions, 12806 flow. Second operand 13 states and 2683 transitions. [2023-08-30 19:01:56,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 601 transitions, 14190 flow [2023-08-30 19:01:56,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 601 transitions, 13788 flow, removed 29 selfloop flow, removed 10 redundant places. [2023-08-30 19:01:56,920 INFO L231 Difference]: Finished difference. Result has 312 places, 563 transitions, 12673 flow [2023-08-30 19:01:56,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12268, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12673, PETRI_PLACES=312, PETRI_TRANSITIONS=563} [2023-08-30 19:01:56,921 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 291 predicate places. [2023-08-30 19:01:56,921 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 563 transitions, 12673 flow [2023-08-30 19:01:56,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 202.83333333333334) internal successors, (4868), 24 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:56,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:56,922 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:56,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:57,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:57,122 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:57,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:57,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1110045957, now seen corresponding path program 29 times [2023-08-30 19:01:57,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:57,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163198955] [2023-08-30 19:01:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:57,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:57,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:57,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163198955] [2023-08-30 19:01:57,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163198955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:57,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048978825] [2023-08-30 19:01:57,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:01:57,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:57,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:57,477 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:57,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 19:01:57,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:01:57,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:57,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:01:57,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:57,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2023-08-30 19:01:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:57,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:58,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:58,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 69 [2023-08-30 19:01:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:58,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048978825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:58,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:58,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-30 19:01:58,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783309611] [2023-08-30 19:01:58,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:58,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:01:58,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:01:58,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:01:58,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-30 19:01:58,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 563 transitions, 12673 flow. Second operand has 20 states, 20 states have (on average 208.15) internal successors, (4163), 20 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:58,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:58,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-30 19:01:58,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:00,475 INFO L130 PetriNetUnfolder]: 1726/3631 cut-off events. [2023-08-30 19:02:00,475 INFO L131 PetriNetUnfolder]: For 62873/62873 co-relation queries the response was YES. [2023-08-30 19:02:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29911 conditions, 3631 events. 1726/3631 cut-off events. For 62873/62873 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 28132 event pairs, 356 based on Foata normal form. 12/3643 useless extension candidates. Maximal degree in co-relation 29803. Up to 1996 conditions per place. [2023-08-30 19:02:00,510 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 365 selfloop transitions, 238 changer transitions 0/603 dead transitions. [2023-08-30 19:02:00,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 603 transitions, 14026 flow [2023-08-30 19:02:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:02:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:02:00,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2758 transitions. [2023-08-30 19:02:00,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774979468929647 [2023-08-30 19:02:00,512 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2758 transitions. [2023-08-30 19:02:00,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2758 transitions. [2023-08-30 19:02:00,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:00,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2758 transitions. [2023-08-30 19:02:00,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 212.15384615384616) internal successors, (2758), 13 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:00,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:00,518 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:00,518 INFO L175 Difference]: Start difference. First operand has 312 places, 563 transitions, 12673 flow. Second operand 13 states and 2758 transitions. [2023-08-30 19:02:00,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 603 transitions, 14026 flow [2023-08-30 19:02:01,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 603 transitions, 13764 flow, removed 18 selfloop flow, removed 12 redundant places. [2023-08-30 19:02:01,067 INFO L231 Difference]: Finished difference. Result has 309 places, 563 transitions, 12999 flow [2023-08-30 19:02:01,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12349, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12999, PETRI_PLACES=309, PETRI_TRANSITIONS=563} [2023-08-30 19:02:01,068 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-08-30 19:02:01,068 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 563 transitions, 12999 flow [2023-08-30 19:02:01,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 208.15) internal successors, (4163), 20 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:01,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:01,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:01,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:01,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:01,274 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:01,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:01,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2082779586, now seen corresponding path program 30 times [2023-08-30 19:02:01,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:01,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666969226] [2023-08-30 19:02:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:01,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:01,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:01,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666969226] [2023-08-30 19:02:01,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666969226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334446771] [2023-08-30 19:02:01,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:02:01,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:01,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:01,578 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:01,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 19:02:01,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:02:01,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:01,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 19:02:01,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:01,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2023-08-30 19:02:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:01,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:02,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:02,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2023-08-30 19:02:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:02,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334446771] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:02,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:02,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 19:02:02,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481386745] [2023-08-30 19:02:02,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:02,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:02:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:02,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:02:02,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:02:02,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-30 19:02:02,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 563 transitions, 12999 flow. Second operand has 18 states, 18 states have (on average 209.22222222222223) internal successors, (3766), 18 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:02,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:02,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-30 19:02:02,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:03,737 INFO L130 PetriNetUnfolder]: 1694/3559 cut-off events. [2023-08-30 19:02:03,737 INFO L131 PetriNetUnfolder]: For 64012/64012 co-relation queries the response was YES. [2023-08-30 19:02:03,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30097 conditions, 3559 events. 1694/3559 cut-off events. For 64012/64012 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27375 event pairs, 434 based on Foata normal form. 8/3567 useless extension candidates. Maximal degree in co-relation 29993. Up to 2492 conditions per place. [2023-08-30 19:02:03,768 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 368 selfloop transitions, 207 changer transitions 10/585 dead transitions. [2023-08-30 19:02:03,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 585 transitions, 14226 flow [2023-08-30 19:02:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:02:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:02:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2334 transitions. [2023-08-30 19:02:03,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37754771918472985 [2023-08-30 19:02:03,771 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2334 transitions. [2023-08-30 19:02:03,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2334 transitions. [2023-08-30 19:02:03,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:03,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2334 transitions. [2023-08-30 19:02:03,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 212.1818181818182) internal successors, (2334), 11 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:03,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:03,775 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:03,775 INFO L175 Difference]: Start difference. First operand has 309 places, 563 transitions, 12999 flow. Second operand 11 states and 2334 transitions. [2023-08-30 19:02:03,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 585 transitions, 14226 flow [2023-08-30 19:02:04,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 585 transitions, 13933 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-30 19:02:04,244 INFO L231 Difference]: Finished difference. Result has 309 places, 556 transitions, 12982 flow [2023-08-30 19:02:04,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12642, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12982, PETRI_PLACES=309, PETRI_TRANSITIONS=556} [2023-08-30 19:02:04,244 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-08-30 19:02:04,245 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 556 transitions, 12982 flow [2023-08-30 19:02:04,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 209.22222222222223) internal successors, (3766), 18 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:04,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:04,245 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:04,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:04,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 19:02:04,446 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:04,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:04,447 INFO L85 PathProgramCache]: Analyzing trace with hash 452270500, now seen corresponding path program 31 times [2023-08-30 19:02:04,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:04,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022083130] [2023-08-30 19:02:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:04,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:04,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:04,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022083130] [2023-08-30 19:02:04,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022083130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:04,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715050791] [2023-08-30 19:02:04,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:02:04,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:04,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:04,784 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:04,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 19:02:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:04,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:02:04,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:05,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-08-30 19:02:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:05,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:05,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:05,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-08-30 19:02:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:05,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715050791] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:05,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:05,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-08-30 19:02:05,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848530232] [2023-08-30 19:02:05,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:05,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:02:05,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:05,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:02:05,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:02:06,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-30 19:02:06,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 556 transitions, 12982 flow. Second operand has 21 states, 21 states have (on average 209.28571428571428) internal successors, (4395), 21 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:06,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:06,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-30 19:02:06,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:07,877 INFO L130 PetriNetUnfolder]: 1654/3463 cut-off events. [2023-08-30 19:02:07,877 INFO L131 PetriNetUnfolder]: For 64625/64625 co-relation queries the response was YES. [2023-08-30 19:02:07,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29571 conditions, 3463 events. 1654/3463 cut-off events. For 64625/64625 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26384 event pairs, 62 based on Foata normal form. 8/3471 useless extension candidates. Maximal degree in co-relation 29467. Up to 1738 conditions per place. [2023-08-30 19:02:07,906 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 324 selfloop transitions, 253 changer transitions 5/582 dead transitions. [2023-08-30 19:02:07,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 582 transitions, 14247 flow [2023-08-30 19:02:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:02:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:02:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2756 transitions. [2023-08-30 19:02:07,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37722419928825623 [2023-08-30 19:02:07,908 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2756 transitions. [2023-08-30 19:02:07,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2756 transitions. [2023-08-30 19:02:07,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:07,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2756 transitions. [2023-08-30 19:02:07,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 212.0) internal successors, (2756), 13 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:07,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:07,914 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:07,914 INFO L175 Difference]: Start difference. First operand has 309 places, 556 transitions, 12982 flow. Second operand 13 states and 2756 transitions. [2023-08-30 19:02:07,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 582 transitions, 14247 flow [2023-08-30 19:02:08,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 582 transitions, 13806 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-30 19:02:08,382 INFO L231 Difference]: Finished difference. Result has 305 places, 549 transitions, 12897 flow [2023-08-30 19:02:08,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12441, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12897, PETRI_PLACES=305, PETRI_TRANSITIONS=549} [2023-08-30 19:02:08,383 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2023-08-30 19:02:08,383 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 549 transitions, 12897 flow [2023-08-30 19:02:08,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 209.28571428571428) internal successors, (4395), 21 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:08,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:08,384 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:08,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:08,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-30 19:02:08,584 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:08,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:08,585 INFO L85 PathProgramCache]: Analyzing trace with hash 216370355, now seen corresponding path program 32 times [2023-08-30 19:02:08,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:08,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065768996] [2023-08-30 19:02:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:08,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:08,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:08,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065768996] [2023-08-30 19:02:08,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065768996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:08,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411783406] [2023-08-30 19:02:08,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:02:08,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:08,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:08,879 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:08,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 19:02:09,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:02:09,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:09,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:02:09,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:09,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-30 19:02:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:09,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:09,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:09,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-30 19:02:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:09,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411783406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:09,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:09,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-30 19:02:09,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511367042] [2023-08-30 19:02:09,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:09,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:02:09,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:09,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:02:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:02:10,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-30 19:02:10,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 549 transitions, 12897 flow. Second operand has 19 states, 19 states have (on average 208.26315789473685) internal successors, (3957), 19 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:10,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:10,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-30 19:02:10,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:11,249 INFO L130 PetriNetUnfolder]: 1626/3339 cut-off events. [2023-08-30 19:02:11,249 INFO L131 PetriNetUnfolder]: For 67515/67515 co-relation queries the response was YES. [2023-08-30 19:02:11,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28946 conditions, 3339 events. 1626/3339 cut-off events. For 67515/67515 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24758 event pairs, 623 based on Foata normal form. 32/3371 useless extension candidates. Maximal degree in co-relation 28843. Up to 2977 conditions per place. [2023-08-30 19:02:11,273 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 457 selfloop transitions, 105 changer transitions 2/564 dead transitions. [2023-08-30 19:02:11,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 564 transitions, 14071 flow [2023-08-30 19:02:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:02:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:02:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1901 transitions. [2023-08-30 19:02:11,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37584025306445235 [2023-08-30 19:02:11,274 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1901 transitions. [2023-08-30 19:02:11,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1901 transitions. [2023-08-30 19:02:11,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:11,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1901 transitions. [2023-08-30 19:02:11,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.22222222222223) internal successors, (1901), 9 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:11,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 562.0) internal successors, (5620), 10 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:11,278 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 562.0) internal successors, (5620), 10 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:11,278 INFO L175 Difference]: Start difference. First operand has 305 places, 549 transitions, 12897 flow. Second operand 9 states and 1901 transitions. [2023-08-30 19:02:11,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 564 transitions, 14071 flow [2023-08-30 19:02:11,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 564 transitions, 13541 flow, removed 5 selfloop flow, removed 14 redundant places. [2023-08-30 19:02:11,627 INFO L231 Difference]: Finished difference. Result has 293 places, 543 transitions, 12486 flow [2023-08-30 19:02:11,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12233, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12486, PETRI_PLACES=293, PETRI_TRANSITIONS=543} [2023-08-30 19:02:11,628 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2023-08-30 19:02:11,628 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 543 transitions, 12486 flow [2023-08-30 19:02:11,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 208.26315789473685) internal successors, (3957), 19 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:11,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:11,629 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:11,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:11,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 19:02:11,833 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:11,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:11,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1781878825, now seen corresponding path program 33 times [2023-08-30 19:02:11,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:11,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62660494] [2023-08-30 19:02:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:11,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:12,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62660494] [2023-08-30 19:02:12,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62660494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:12,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893986426] [2023-08-30 19:02:12,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:02:12,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:12,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:12,190 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:12,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 19:02:12,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:02:12,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:12,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 19:02:12,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:12,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:02:12,485 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 52 treesize of output 48 [2023-08-30 19:02:12,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-30 19:02:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:12,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:12,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:12,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 58 [2023-08-30 19:02:12,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-08-30 19:02:12,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-08-30 19:02:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:12,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893986426] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:12,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:12,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 19:02:12,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715994578] [2023-08-30 19:02:12,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:12,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 19:02:12,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:12,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 19:02:12,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=420, Unknown=1, NotChecked=0, Total=506 [2023-08-30 19:02:13,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-08-30 19:02:13,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 543 transitions, 12486 flow. Second operand has 23 states, 23 states have (on average 182.82608695652175) internal successors, (4205), 23 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:13,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:13,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-08-30 19:02:13,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:14,719 INFO L130 PetriNetUnfolder]: 1655/3366 cut-off events. [2023-08-30 19:02:14,719 INFO L131 PetriNetUnfolder]: For 64154/64154 co-relation queries the response was YES. [2023-08-30 19:02:14,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29115 conditions, 3366 events. 1655/3366 cut-off events. For 64154/64154 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24718 event pairs, 148 based on Foata normal form. 36/3402 useless extension candidates. Maximal degree in co-relation 29014. Up to 1308 conditions per place. [2023-08-30 19:02:14,747 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 234 selfloop transitions, 374 changer transitions 2/610 dead transitions. [2023-08-30 19:02:14,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 610 transitions, 14697 flow [2023-08-30 19:02:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:02:14,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:02:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2610 transitions. [2023-08-30 19:02:14,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33172343670564314 [2023-08-30 19:02:14,749 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2610 transitions. [2023-08-30 19:02:14,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2610 transitions. [2023-08-30 19:02:14,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:14,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2610 transitions. [2023-08-30 19:02:14,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.42857142857142) internal successors, (2610), 14 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:14,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:14,755 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:14,755 INFO L175 Difference]: Start difference. First operand has 293 places, 543 transitions, 12486 flow. Second operand 14 states and 2610 transitions. [2023-08-30 19:02:14,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 610 transitions, 14697 flow [2023-08-30 19:02:15,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 610 transitions, 14488 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 19:02:15,181 INFO L231 Difference]: Finished difference. Result has 301 places, 564 transitions, 13716 flow [2023-08-30 19:02:15,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12293, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13716, PETRI_PLACES=301, PETRI_TRANSITIONS=564} [2023-08-30 19:02:15,181 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 280 predicate places. [2023-08-30 19:02:15,181 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 564 transitions, 13716 flow [2023-08-30 19:02:15,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 182.82608695652175) internal successors, (4205), 23 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:15,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:15,182 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:15,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:15,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 19:02:15,383 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:15,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:15,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1235969341, now seen corresponding path program 34 times [2023-08-30 19:02:15,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:15,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650834814] [2023-08-30 19:02:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:15,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:15,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:15,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650834814] [2023-08-30 19:02:15,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650834814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:15,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338830208] [2023-08-30 19:02:15,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:02:15,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:15,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:15,752 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:15,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 19:02:15,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:02:15,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:15,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 19:02:15,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:16,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:02:16,076 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 65 treesize of output 61 [2023-08-30 19:02:16,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-08-30 19:02:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:16,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:16,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:16,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 58 [2023-08-30 19:02:16,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-08-30 19:02:16,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-08-30 19:02:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:16,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338830208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:16,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:16,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 19:02:16,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516935231] [2023-08-30 19:02:16,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:16,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:02:16,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:16,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:02:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=511, Unknown=1, NotChecked=0, Total=600 [2023-08-30 19:02:18,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-08-30 19:02:18,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 564 transitions, 13716 flow. Second operand has 25 states, 25 states have (on average 182.84) internal successors, (4571), 25 states have internal predecessors, (4571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:18,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:18,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-08-30 19:02:18,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:19,864 INFO L130 PetriNetUnfolder]: 1686/3405 cut-off events. [2023-08-30 19:02:19,865 INFO L131 PetriNetUnfolder]: For 71604/71604 co-relation queries the response was YES. [2023-08-30 19:02:19,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30668 conditions, 3405 events. 1686/3405 cut-off events. For 71604/71604 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 24921 event pairs, 158 based on Foata normal form. 12/3417 useless extension candidates. Maximal degree in co-relation 30565. Up to 1814 conditions per place. [2023-08-30 19:02:19,892 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 293 selfloop transitions, 347 changer transitions 1/641 dead transitions. [2023-08-30 19:02:19,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 641 transitions, 15905 flow [2023-08-30 19:02:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:02:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:02:19,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3179 transitions. [2023-08-30 19:02:19,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33274021352313166 [2023-08-30 19:02:19,894 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3179 transitions. [2023-08-30 19:02:19,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3179 transitions. [2023-08-30 19:02:19,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:19,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3179 transitions. [2023-08-30 19:02:19,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 187.0) internal successors, (3179), 17 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:19,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:19,901 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:19,901 INFO L175 Difference]: Start difference. First operand has 301 places, 564 transitions, 13716 flow. Second operand 17 states and 3179 transitions. [2023-08-30 19:02:19,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 641 transitions, 15905 flow [2023-08-30 19:02:20,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 641 transitions, 15309 flow, removed 61 selfloop flow, removed 8 redundant places. [2023-08-30 19:02:20,376 INFO L231 Difference]: Finished difference. Result has 312 places, 576 transitions, 14264 flow [2023-08-30 19:02:20,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13129, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=14264, PETRI_PLACES=312, PETRI_TRANSITIONS=576} [2023-08-30 19:02:20,376 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 291 predicate places. [2023-08-30 19:02:20,376 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 576 transitions, 14264 flow [2023-08-30 19:02:20,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 182.84) internal successors, (4571), 25 states have internal predecessors, (4571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:20,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:20,377 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:20,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-30 19:02:20,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:20,581 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:20,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:20,582 INFO L85 PathProgramCache]: Analyzing trace with hash -935413069, now seen corresponding path program 35 times [2023-08-30 19:02:20,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:20,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442073327] [2023-08-30 19:02:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:20,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:21,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:21,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442073327] [2023-08-30 19:02:21,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442073327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:21,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403674034] [2023-08-30 19:02:21,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:02:21,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:21,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:21,039 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:21,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 19:02:21,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:02:21,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:21,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 19:02:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:21,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:02:21,390 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 65 treesize of output 61 [2023-08-30 19:02:21,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-08-30 19:02:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:21,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:21,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:21,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 58 [2023-08-30 19:02:21,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-08-30 19:02:21,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-08-30 19:02:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:21,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403674034] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:21,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:21,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-08-30 19:02:21,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999037418] [2023-08-30 19:02:21,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:21,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:02:21,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:21,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:02:21,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=496, Unknown=2, NotChecked=0, Total=600 [2023-08-30 19:02:22,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-08-30 19:02:22,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 576 transitions, 14264 flow. Second operand has 25 states, 25 states have (on average 182.76) internal successors, (4569), 25 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:22,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:22,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-08-30 19:02:22,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:24,277 INFO L130 PetriNetUnfolder]: 1668/3343 cut-off events. [2023-08-30 19:02:24,277 INFO L131 PetriNetUnfolder]: For 72659/72659 co-relation queries the response was YES. [2023-08-30 19:02:24,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30366 conditions, 3343 events. 1668/3343 cut-off events. For 72659/72659 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 24273 event pairs, 136 based on Foata normal form. 6/3349 useless extension candidates. Maximal degree in co-relation 30262. Up to 1814 conditions per place. [2023-08-30 19:02:24,306 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 272 selfloop transitions, 339 changer transitions 2/613 dead transitions. [2023-08-30 19:02:24,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 613 transitions, 15667 flow [2023-08-30 19:02:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:02:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:02:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2615 transitions. [2023-08-30 19:02:24,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3323589222165735 [2023-08-30 19:02:24,308 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2615 transitions. [2023-08-30 19:02:24,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2615 transitions. [2023-08-30 19:02:24,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:24,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2615 transitions. [2023-08-30 19:02:24,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.78571428571428) internal successors, (2615), 14 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:24,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:24,316 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:24,316 INFO L175 Difference]: Start difference. First operand has 312 places, 576 transitions, 14264 flow. Second operand 14 states and 2615 transitions. [2023-08-30 19:02:24,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 613 transitions, 15667 flow [2023-08-30 19:02:24,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 613 transitions, 15307 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-08-30 19:02:24,785 INFO L231 Difference]: Finished difference. Result has 311 places, 568 transitions, 14433 flow [2023-08-30 19:02:24,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13773, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14433, PETRI_PLACES=311, PETRI_TRANSITIONS=568} [2023-08-30 19:02:24,786 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 290 predicate places. [2023-08-30 19:02:24,786 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 568 transitions, 14433 flow [2023-08-30 19:02:24,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 182.76) internal successors, (4569), 25 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:24,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:24,786 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:24,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:24,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-08-30 19:02:24,987 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:24,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:24,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2017814978, now seen corresponding path program 36 times [2023-08-30 19:02:24,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:24,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608273938] [2023-08-30 19:02:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:24,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:25,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:25,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608273938] [2023-08-30 19:02:25,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608273938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:25,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973423362] [2023-08-30 19:02:25,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:02:25,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:25,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:25,441 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:25,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 19:02:25,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:02:25,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:25,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 19:02:25,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:02:25,758 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 52 treesize of output 48 [2023-08-30 19:02:25,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2023-08-30 19:02:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:25,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:26,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:26,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 75 [2023-08-30 19:02:26,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-08-30 19:02:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:26,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973423362] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:26,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:26,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 19:02:26,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844678782] [2023-08-30 19:02:26,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:26,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 19:02:26,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 19:02:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=542, Unknown=1, NotChecked=0, Total=650 [2023-08-30 19:02:27,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-08-30 19:02:27,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 568 transitions, 14433 flow. Second operand has 26 states, 26 states have (on average 182.84615384615384) internal successors, (4754), 26 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:27,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:27,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-08-30 19:02:27,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:28,603 INFO L130 PetriNetUnfolder]: 1634/3265 cut-off events. [2023-08-30 19:02:28,604 INFO L131 PetriNetUnfolder]: For 78614/78614 co-relation queries the response was YES. [2023-08-30 19:02:28,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30192 conditions, 3265 events. 1634/3265 cut-off events. For 78614/78614 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23440 event pairs, 187 based on Foata normal form. 8/3273 useless extension candidates. Maximal degree in co-relation 30090. Up to 1064 conditions per place. [2023-08-30 19:02:28,631 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 258 selfloop transitions, 339 changer transitions 11/608 dead transitions. [2023-08-30 19:02:28,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 608 transitions, 15993 flow [2023-08-30 19:02:28,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 19:02:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 19:02:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3517 transitions. [2023-08-30 19:02:28,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32936879565461696 [2023-08-30 19:02:28,633 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3517 transitions. [2023-08-30 19:02:28,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3517 transitions. [2023-08-30 19:02:28,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:28,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3517 transitions. [2023-08-30 19:02:28,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 185.10526315789474) internal successors, (3517), 19 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:28,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 562.0) internal successors, (11240), 20 states have internal predecessors, (11240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:28,640 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 562.0) internal successors, (11240), 20 states have internal predecessors, (11240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:28,640 INFO L175 Difference]: Start difference. First operand has 311 places, 568 transitions, 14433 flow. Second operand 19 states and 3517 transitions. [2023-08-30 19:02:28,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 608 transitions, 15993 flow [2023-08-30 19:02:29,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 608 transitions, 15316 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-30 19:02:29,052 INFO L231 Difference]: Finished difference. Result has 314 places, 571 transitions, 14482 flow [2023-08-30 19:02:29,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13698, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14482, PETRI_PLACES=314, PETRI_TRANSITIONS=571} [2023-08-30 19:02:29,057 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2023-08-30 19:02:29,057 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 571 transitions, 14482 flow [2023-08-30 19:02:29,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 182.84615384615384) internal successors, (4754), 26 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:29,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:29,058 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:29,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:29,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-30 19:02:29,261 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:29,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash -479361748, now seen corresponding path program 37 times [2023-08-30 19:02:29,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:29,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408818158] [2023-08-30 19:02:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:29,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 19:02:29,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:29,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408818158] [2023-08-30 19:02:29,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408818158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:02:29,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:02:29,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:02:29,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722197064] [2023-08-30 19:02:29,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:02:29,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:02:29,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:29,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:02:29,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 19:02:29,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 562 [2023-08-30 19:02:29,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 571 transitions, 14482 flow. Second operand has 6 states, 6 states have (on average 238.33333333333334) internal successors, (1430), 6 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:29,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:29,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 562 [2023-08-30 19:02:29,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:29,698 INFO L130 PetriNetUnfolder]: 819/1624 cut-off events. [2023-08-30 19:02:29,698 INFO L131 PetriNetUnfolder]: For 39054/39054 co-relation queries the response was YES. [2023-08-30 19:02:29,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15255 conditions, 1624 events. 819/1624 cut-off events. For 39054/39054 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 9899 event pairs, 350 based on Foata normal form. 1/1625 useless extension candidates. Maximal degree in co-relation 15158. Up to 1621 conditions per place. [2023-08-30 19:02:29,710 INFO L137 encePairwiseOnDemand]: 560/562 looper letters, 348 selfloop transitions, 4 changer transitions 0/352 dead transitions. [2023-08-30 19:02:29,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 352 transitions, 9011 flow [2023-08-30 19:02:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:02:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:02:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1430 transitions. [2023-08-30 19:02:29,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408066429418745 [2023-08-30 19:02:29,712 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1430 transitions. [2023-08-30 19:02:29,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1430 transitions. [2023-08-30 19:02:29,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:29,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1430 transitions. [2023-08-30 19:02:29,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 238.33333333333334) internal successors, (1430), 6 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:29,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:29,715 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:29,715 INFO L175 Difference]: Start difference. First operand has 314 places, 571 transitions, 14482 flow. Second operand 6 states and 1430 transitions. [2023-08-30 19:02:29,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 352 transitions, 9011 flow [2023-08-30 19:02:29,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 352 transitions, 7835 flow, removed 15 selfloop flow, removed 34 redundant places. [2023-08-30 19:02:29,849 INFO L231 Difference]: Finished difference. Result has 261 places, 352 transitions, 7139 flow [2023-08-30 19:02:29,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7131, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7139, PETRI_PLACES=261, PETRI_TRANSITIONS=352} [2023-08-30 19:02:29,849 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-08-30 19:02:29,849 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 352 transitions, 7139 flow [2023-08-30 19:02:29,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 238.33333333333334) internal successors, (1430), 6 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:29,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:29,850 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:29,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-08-30 19:02:29,850 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:29,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash -678092971, now seen corresponding path program 38 times [2023-08-30 19:02:29,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:29,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653139819] [2023-08-30 19:02:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:29,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:02:30,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:30,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653139819] [2023-08-30 19:02:30,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653139819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:30,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505465770] [2023-08-30 19:02:30,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:02:30,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:30,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:30,897 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:30,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 19:02:31,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:02:31,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:31,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:02:31,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:31,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 86 [2023-08-30 19:02:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:31,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:32,913 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 19:02:32,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 242 treesize of output 141 [2023-08-30 19:02:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:32,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505465770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:32,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:32,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-30 19:02:32,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757444743] [2023-08-30 19:02:32,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:32,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 19:02:32,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 19:02:32,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2023-08-30 19:02:35,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-08-30 19:02:35,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 352 transitions, 7139 flow. Second operand has 32 states, 32 states have (on average 186.71875) internal successors, (5975), 32 states have internal predecessors, (5975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:35,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:35,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-08-30 19:02:35,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:42,194 INFO L130 PetriNetUnfolder]: 1391/2887 cut-off events. [2023-08-30 19:02:42,194 INFO L131 PetriNetUnfolder]: For 54196/54196 co-relation queries the response was YES. [2023-08-30 19:02:42,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23802 conditions, 2887 events. 1391/2887 cut-off events. For 54196/54196 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20997 event pairs, 52 based on Foata normal form. 26/2913 useless extension candidates. Maximal degree in co-relation 23717. Up to 739 conditions per place. [2023-08-30 19:02:42,216 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 233 selfloop transitions, 362 changer transitions 64/659 dead transitions. [2023-08-30 19:02:42,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 659 transitions, 13609 flow [2023-08-30 19:02:42,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 19:02:42,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 19:02:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 7953 transitions. [2023-08-30 19:02:42,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336934417895272 [2023-08-30 19:02:42,221 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 7953 transitions. [2023-08-30 19:02:42,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 7953 transitions. [2023-08-30 19:02:42,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:42,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 7953 transitions. [2023-08-30 19:02:42,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 189.35714285714286) internal successors, (7953), 42 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:42,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:42,235 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:42,235 INFO L175 Difference]: Start difference. First operand has 261 places, 352 transitions, 7139 flow. Second operand 42 states and 7953 transitions. [2023-08-30 19:02:42,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 659 transitions, 13609 flow [2023-08-30 19:02:42,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 659 transitions, 13602 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 19:02:42,519 INFO L231 Difference]: Finished difference. Result has 307 places, 480 transitions, 10528 flow [2023-08-30 19:02:42,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7132, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=10528, PETRI_PLACES=307, PETRI_TRANSITIONS=480} [2023-08-30 19:02:42,519 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 286 predicate places. [2023-08-30 19:02:42,520 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 480 transitions, 10528 flow [2023-08-30 19:02:42,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 186.71875) internal successors, (5975), 32 states have internal predecessors, (5975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:42,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:42,520 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:42,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:42,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-30 19:02:42,725 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:42,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:42,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1882165963, now seen corresponding path program 39 times [2023-08-30 19:02:42,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:42,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67428625] [2023-08-30 19:02:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:42,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:43,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:43,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67428625] [2023-08-30 19:02:43,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67428625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:43,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302912299] [2023-08-30 19:02:43,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:02:43,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:43,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:43,941 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:43,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 19:02:44,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:02:44,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:44,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 19:02:44,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:44,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:44,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 86 [2023-08-30 19:02:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:44,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:47,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:47,346 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 277 treesize of output 175 [2023-08-30 19:02:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:47,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302912299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:47,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:47,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-08-30 19:02:47,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266749047] [2023-08-30 19:02:47,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:47,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 19:02:47,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:47,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 19:02:47,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2023-08-30 19:02:49,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:02:49,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 480 transitions, 10528 flow. Second operand has 28 states, 28 states have (on average 195.78571428571428) internal successors, (5482), 28 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:49,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:49,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:02:49,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:53,914 INFO L130 PetriNetUnfolder]: 1660/3203 cut-off events. [2023-08-30 19:02:53,914 INFO L131 PetriNetUnfolder]: For 68685/68685 co-relation queries the response was YES. [2023-08-30 19:02:53,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28631 conditions, 3203 events. 1660/3203 cut-off events. For 68685/68685 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22163 event pairs, 176 based on Foata normal form. 7/3210 useless extension candidates. Maximal degree in co-relation 28536. Up to 853 conditions per place. [2023-08-30 19:02:53,941 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 336 selfloop transitions, 348 changer transitions 20/704 dead transitions. [2023-08-30 19:02:53,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 704 transitions, 15880 flow [2023-08-30 19:02:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 19:02:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 19:02:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4391 transitions. [2023-08-30 19:02:53,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35514396635393075 [2023-08-30 19:02:53,945 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4391 transitions. [2023-08-30 19:02:53,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4391 transitions. [2023-08-30 19:02:53,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:53,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4391 transitions. [2023-08-30 19:02:53,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 199.5909090909091) internal successors, (4391), 22 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:53,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:53,952 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:53,952 INFO L175 Difference]: Start difference. First operand has 307 places, 480 transitions, 10528 flow. Second operand 22 states and 4391 transitions. [2023-08-30 19:02:53,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 704 transitions, 15880 flow [2023-08-30 19:02:54,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 704 transitions, 14515 flow, removed 408 selfloop flow, removed 18 redundant places. [2023-08-30 19:02:54,300 INFO L231 Difference]: Finished difference. Result has 314 places, 591 transitions, 12655 flow [2023-08-30 19:02:54,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9585, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12655, PETRI_PLACES=314, PETRI_TRANSITIONS=591} [2023-08-30 19:02:54,301 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2023-08-30 19:02:54,301 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 591 transitions, 12655 flow [2023-08-30 19:02:54,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 195.78571428571428) internal successors, (5482), 28 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:54,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:54,302 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:54,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:54,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:54,508 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:54,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:54,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1575334059, now seen corresponding path program 40 times [2023-08-30 19:02:54,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:54,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747669653] [2023-08-30 19:02:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:54,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:55,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:55,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747669653] [2023-08-30 19:02:55,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747669653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:55,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297807841] [2023-08-30 19:02:55,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:02:55,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:55,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:55,218 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:55,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 19:02:55,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:02:55,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:55,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 19:02:55,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:56,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:56,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 99 [2023-08-30 19:02:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:56,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:58,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:58,131 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 143 [2023-08-30 19:02:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:58,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297807841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:58,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:58,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 19:02:58,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692922062] [2023-08-30 19:02:58,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:58,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:02:58,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:58,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:02:58,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:03:00,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:03:00,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 591 transitions, 12655 flow. Second operand has 27 states, 27 states have (on average 195.77777777777777) internal successors, (5286), 27 states have internal predecessors, (5286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:00,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:03:00,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:03:00,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:03:03,599 INFO L130 PetriNetUnfolder]: 1922/3702 cut-off events. [2023-08-30 19:03:03,600 INFO L131 PetriNetUnfolder]: For 80031/80031 co-relation queries the response was YES. [2023-08-30 19:03:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32012 conditions, 3702 events. 1922/3702 cut-off events. For 80031/80031 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 26124 event pairs, 384 based on Foata normal form. 16/3718 useless extension candidates. Maximal degree in co-relation 31913. Up to 2091 conditions per place. [2023-08-30 19:03:03,631 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 472 selfloop transitions, 261 changer transitions 31/764 dead transitions. [2023-08-30 19:03:03,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 764 transitions, 16777 flow [2023-08-30 19:03:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 19:03:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 19:03:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6169 transitions. [2023-08-30 19:03:03,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3540925266903915 [2023-08-30 19:03:03,635 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6169 transitions. [2023-08-30 19:03:03,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6169 transitions. [2023-08-30 19:03:03,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:03:03,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6169 transitions. [2023-08-30 19:03:03,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 199.0) internal successors, (6169), 31 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:03,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:03,646 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:03,646 INFO L175 Difference]: Start difference. First operand has 314 places, 591 transitions, 12655 flow. Second operand 31 states and 6169 transitions. [2023-08-30 19:03:03,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 764 transitions, 16777 flow [2023-08-30 19:03:04,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 764 transitions, 16540 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-08-30 19:03:04,139 INFO L231 Difference]: Finished difference. Result has 344 places, 644 transitions, 14350 flow [2023-08-30 19:03:04,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12434, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14350, PETRI_PLACES=344, PETRI_TRANSITIONS=644} [2023-08-30 19:03:04,140 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 323 predicate places. [2023-08-30 19:03:04,140 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 644 transitions, 14350 flow [2023-08-30 19:03:04,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.77777777777777) internal successors, (5286), 27 states have internal predecessors, (5286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:04,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:03:04,141 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:03:04,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 19:03:04,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:04,341 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:03:04,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:03:04,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1317900205, now seen corresponding path program 41 times [2023-08-30 19:03:04,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:03:04,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249650494] [2023-08-30 19:03:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:03:04,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:03:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:03:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:05,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:03:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249650494] [2023-08-30 19:03:05,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249650494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:03:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126205354] [2023-08-30 19:03:05,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:03:05,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:05,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:03:05,053 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:03:05,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 19:03:05,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:03:05,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:03:05,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 19:03:05,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:03:05,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 113 [2023-08-30 19:03:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:05,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:03:07,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:03:07,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 313 treesize of output 191 [2023-08-30 19:03:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:07,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126205354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:03:07,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:03:07,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 19:03:07,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405292147] [2023-08-30 19:03:07,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:03:07,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:03:07,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:03:07,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:03:07,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:03:09,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:03:09,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 644 transitions, 14350 flow. Second operand has 27 states, 27 states have (on average 195.7037037037037) internal successors, (5284), 27 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:09,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:03:09,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:03:09,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:03:15,580 INFO L130 PetriNetUnfolder]: 2148/4255 cut-off events. [2023-08-30 19:03:15,581 INFO L131 PetriNetUnfolder]: For 97863/97863 co-relation queries the response was YES. [2023-08-30 19:03:15,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37823 conditions, 4255 events. 2148/4255 cut-off events. For 97863/97863 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31657 event pairs, 106 based on Foata normal form. 15/4270 useless extension candidates. Maximal degree in co-relation 37715. Up to 1142 conditions per place. [2023-08-30 19:03:15,616 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 499 selfloop transitions, 426 changer transitions 35/960 dead transitions. [2023-08-30 19:03:15,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 960 transitions, 21428 flow [2023-08-30 19:03:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 19:03:15,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 19:03:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 7198 transitions. [2023-08-30 19:03:15,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3557730328192962 [2023-08-30 19:03:15,621 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 7198 transitions. [2023-08-30 19:03:15,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 7198 transitions. [2023-08-30 19:03:15,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:03:15,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 7198 transitions. [2023-08-30 19:03:15,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 199.94444444444446) internal successors, (7198), 36 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:15,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:15,633 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:15,633 INFO L175 Difference]: Start difference. First operand has 344 places, 644 transitions, 14350 flow. Second operand 36 states and 7198 transitions. [2023-08-30 19:03:15,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 960 transitions, 21428 flow [2023-08-30 19:03:16,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 960 transitions, 20921 flow, removed 154 selfloop flow, removed 17 redundant places. [2023-08-30 19:03:16,322 INFO L231 Difference]: Finished difference. Result has 373 places, 732 transitions, 17052 flow [2023-08-30 19:03:16,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13983, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=17052, PETRI_PLACES=373, PETRI_TRANSITIONS=732} [2023-08-30 19:03:16,323 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 352 predicate places. [2023-08-30 19:03:16,323 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 732 transitions, 17052 flow [2023-08-30 19:03:16,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.7037037037037) internal successors, (5284), 27 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:16,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:03:16,324 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:03:16,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-08-30 19:03:16,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-30 19:03:16,525 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:03:16,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:03:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash -256187255, now seen corresponding path program 42 times [2023-08-30 19:03:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:03:16,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604475613] [2023-08-30 19:03:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:03:16,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:03:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:03:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:17,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:03:17,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604475613] [2023-08-30 19:03:17,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604475613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:03:17,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338688719] [2023-08-30 19:03:17,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:03:17,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:17,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:03:17,482 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:03:17,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 19:03:17,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:03:17,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:03:17,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 19:03:17,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:03:18,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:03:18,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 99 [2023-08-30 19:03:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:18,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:03:20,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:03:20,246 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 154 [2023-08-30 19:03:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:20,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338688719] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:03:20,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:03:20,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-08-30 19:03:20,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336141477] [2023-08-30 19:03:20,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:03:20,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 19:03:20,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:03:20,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 19:03:20,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-08-30 19:03:22,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:03:22,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 732 transitions, 17052 flow. Second operand has 28 states, 28 states have (on average 195.78571428571428) internal successors, (5482), 28 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:22,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:03:22,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:03:22,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:03:26,978 INFO L130 PetriNetUnfolder]: 2132/4198 cut-off events. [2023-08-30 19:03:26,978 INFO L131 PetriNetUnfolder]: For 105703/105703 co-relation queries the response was YES. [2023-08-30 19:03:27,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39218 conditions, 4198 events. 2132/4198 cut-off events. For 105703/105703 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 30945 event pairs, 569 based on Foata normal form. 8/4206 useless extension candidates. Maximal degree in co-relation 39100. Up to 3041 conditions per place. [2023-08-30 19:03:27,018 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 518 selfloop transitions, 268 changer transitions 19/805 dead transitions. [2023-08-30 19:03:27,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 805 transitions, 19399 flow [2023-08-30 19:03:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 19:03:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 19:03:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5556 transitions. [2023-08-30 19:03:27,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3530757498729029 [2023-08-30 19:03:27,022 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5556 transitions. [2023-08-30 19:03:27,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5556 transitions. [2023-08-30 19:03:27,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:03:27,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5556 transitions. [2023-08-30 19:03:27,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 198.42857142857142) internal successors, (5556), 28 states have internal predecessors, (5556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:27,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:27,032 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:27,032 INFO L175 Difference]: Start difference. First operand has 373 places, 732 transitions, 17052 flow. Second operand 28 states and 5556 transitions. [2023-08-30 19:03:27,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 805 transitions, 19399 flow [2023-08-30 19:03:27,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 805 transitions, 18560 flow, removed 126 selfloop flow, removed 19 redundant places. [2023-08-30 19:03:27,841 INFO L231 Difference]: Finished difference. Result has 383 places, 746 transitions, 17151 flow [2023-08-30 19:03:27,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=16124, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17151, PETRI_PLACES=383, PETRI_TRANSITIONS=746} [2023-08-30 19:03:27,842 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 362 predicate places. [2023-08-30 19:03:27,842 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 746 transitions, 17151 flow [2023-08-30 19:03:27,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 195.78571428571428) internal successors, (5482), 28 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:27,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:03:27,843 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:03:27,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 19:03:28,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-30 19:03:28,049 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:03:28,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:03:28,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1775779559, now seen corresponding path program 43 times [2023-08-30 19:03:28,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:03:28,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029565864] [2023-08-30 19:03:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:03:28,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:03:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:03:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:28,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:03:28,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029565864] [2023-08-30 19:03:28,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029565864] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:03:28,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046128423] [2023-08-30 19:03:28,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:03:28,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:28,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:03:28,735 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:03:28,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 19:03:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:03:28,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 19:03:28,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:03:29,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 126 [2023-08-30 19:03:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:29,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:03:30,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:03:30,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 218 [2023-08-30 19:03:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:31,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046128423] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:03:31,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:03:31,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 19:03:31,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834000534] [2023-08-30 19:03:31,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:03:31,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:03:31,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:03:31,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:03:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:03:32,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:03:32,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 746 transitions, 17151 flow. Second operand has 27 states, 27 states have (on average 195.85185185185185) internal successors, (5288), 27 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:32,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:03:32,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:03:32,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:03:38,786 INFO L130 PetriNetUnfolder]: 2974/6191 cut-off events. [2023-08-30 19:03:38,786 INFO L131 PetriNetUnfolder]: For 150937/150937 co-relation queries the response was YES. [2023-08-30 19:03:38,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54568 conditions, 6191 events. 2974/6191 cut-off events. For 150937/150937 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 52105 event pairs, 302 based on Foata normal form. 53/6244 useless extension candidates. Maximal degree in co-relation 54451. Up to 1948 conditions per place. [2023-08-30 19:03:38,845 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 598 selfloop transitions, 643 changer transitions 62/1303 dead transitions. [2023-08-30 19:03:38,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1303 transitions, 30822 flow [2023-08-30 19:03:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 19:03:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 19:03:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 7799 transitions. [2023-08-30 19:03:38,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3558262615202117 [2023-08-30 19:03:38,850 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 7799 transitions. [2023-08-30 19:03:38,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 7799 transitions. [2023-08-30 19:03:38,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:03:38,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 7799 transitions. [2023-08-30 19:03:38,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 199.97435897435898) internal successors, (7799), 39 states have internal predecessors, (7799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:38,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 562.0) internal successors, (22480), 40 states have internal predecessors, (22480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:38,863 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 562.0) internal successors, (22480), 40 states have internal predecessors, (22480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:38,864 INFO L175 Difference]: Start difference. First operand has 383 places, 746 transitions, 17151 flow. Second operand 39 states and 7799 transitions. [2023-08-30 19:03:38,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1303 transitions, 30822 flow [2023-08-30 19:03:40,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1303 transitions, 30230 flow, removed 136 selfloop flow, removed 17 redundant places. [2023-08-30 19:03:40,464 INFO L231 Difference]: Finished difference. Result has 416 places, 1009 transitions, 24103 flow [2023-08-30 19:03:40,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=16666, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24103, PETRI_PLACES=416, PETRI_TRANSITIONS=1009} [2023-08-30 19:03:40,465 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 395 predicate places. [2023-08-30 19:03:40,465 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1009 transitions, 24103 flow [2023-08-30 19:03:40,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.85185185185185) internal successors, (5288), 27 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:40,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:03:40,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:03:40,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 19:03:40,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-30 19:03:40,671 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:03:40,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:03:40,672 INFO L85 PathProgramCache]: Analyzing trace with hash 600903337, now seen corresponding path program 44 times [2023-08-30 19:03:40,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:03:40,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949369547] [2023-08-30 19:03:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:03:40,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:03:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:03:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:41,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:03:41,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949369547] [2023-08-30 19:03:41,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949369547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:03:41,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109410494] [2023-08-30 19:03:41,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:03:41,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:41,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:03:41,523 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:03:41,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 19:03:41,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:03:41,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:03:41,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 19:03:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:03:42,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:03:42,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 128 [2023-08-30 19:03:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:42,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:03:45,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:03:45,279 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 267 treesize of output 170 [2023-08-30 19:03:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:45,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109410494] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:03:45,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:03:45,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-30 19:03:45,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577254709] [2023-08-30 19:03:45,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:03:45,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 19:03:45,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:03:45,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 19:03:45,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:03:48,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:03:48,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1009 transitions, 24103 flow. Second operand has 26 states, 26 states have (on average 195.73076923076923) internal successors, (5089), 26 states have internal predecessors, (5089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:48,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:03:48,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:03:48,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:04:00,488 INFO L130 PetriNetUnfolder]: 3082/6399 cut-off events. [2023-08-30 19:04:00,488 INFO L131 PetriNetUnfolder]: For 174021/174021 co-relation queries the response was YES. [2023-08-30 19:04:00,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60509 conditions, 6399 events. 3082/6399 cut-off events. For 174021/174021 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 53952 event pairs, 697 based on Foata normal form. 13/6412 useless extension candidates. Maximal degree in co-relation 60374. Up to 3639 conditions per place. [2023-08-30 19:04:00,545 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 766 selfloop transitions, 417 changer transitions 25/1208 dead transitions. [2023-08-30 19:04:00,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1208 transitions, 29630 flow [2023-08-30 19:04:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 19:04:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 19:04:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 7379 transitions. [2023-08-30 19:04:00,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35486197941713954 [2023-08-30 19:04:00,550 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 7379 transitions. [2023-08-30 19:04:00,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 7379 transitions. [2023-08-30 19:04:00,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:04:00,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 7379 transitions. [2023-08-30 19:04:00,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 199.43243243243242) internal successors, (7379), 37 states have internal predecessors, (7379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:00,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:00,563 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:00,563 INFO L175 Difference]: Start difference. First operand has 416 places, 1009 transitions, 24103 flow. Second operand 37 states and 7379 transitions. [2023-08-30 19:04:00,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1208 transitions, 29630 flow [2023-08-30 19:04:02,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1208 transitions, 28572 flow, removed 504 selfloop flow, removed 10 redundant places. [2023-08-30 19:04:02,204 INFO L231 Difference]: Finished difference. Result has 450 places, 1074 transitions, 25984 flow [2023-08-30 19:04:02,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=23228, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=25984, PETRI_PLACES=450, PETRI_TRANSITIONS=1074} [2023-08-30 19:04:02,205 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 429 predicate places. [2023-08-30 19:04:02,205 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1074 transitions, 25984 flow [2023-08-30 19:04:02,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 195.73076923076923) internal successors, (5089), 26 states have internal predecessors, (5089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:02,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:04:02,206 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:04:02,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 19:04:02,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:04:02,407 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:04:02,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:04:02,407 INFO L85 PathProgramCache]: Analyzing trace with hash -300215526, now seen corresponding path program 45 times [2023-08-30 19:04:02,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:04:02,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180282439] [2023-08-30 19:04:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:04:02,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:04:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:04:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 19:04:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:04:02,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180282439] [2023-08-30 19:04:02,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180282439] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:04:02,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75456110] [2023-08-30 19:04:02,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:04:02,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:04:02,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:04:02,732 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:04:02,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 19:04:02,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 19:04:02,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:04:02,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:04:02,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:04:03,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-30 19:04:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 19:04:03,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:04:03,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:04:03,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-30 19:04:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 19:04:03,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75456110] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:04:03,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:04:03,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 19:04:03,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011716597] [2023-08-30 19:04:03,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:04:03,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:04:03,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:04:03,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:04:03,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:04:03,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-30 19:04:03,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1074 transitions, 25984 flow. Second operand has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:03,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:04:03,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-30 19:04:03,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:04:06,492 INFO L130 PetriNetUnfolder]: 3091/6363 cut-off events. [2023-08-30 19:04:06,492 INFO L131 PetriNetUnfolder]: For 173147/173147 co-relation queries the response was YES. [2023-08-30 19:04:06,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60412 conditions, 6363 events. 3091/6363 cut-off events. For 173147/173147 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 53158 event pairs, 1322 based on Foata normal form. 8/6371 useless extension candidates. Maximal degree in co-relation 60269. Up to 6192 conditions per place. [2023-08-30 19:04:06,555 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 1054 selfloop transitions, 43 changer transitions 0/1097 dead transitions. [2023-08-30 19:04:06,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1097 transitions, 28461 flow [2023-08-30 19:04:06,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:04:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:04:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1691 transitions. [2023-08-30 19:04:06,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761120996441281 [2023-08-30 19:04:06,557 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1691 transitions. [2023-08-30 19:04:06,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1691 transitions. [2023-08-30 19:04:06,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:04:06,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1691 transitions. [2023-08-30 19:04:06,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 211.375) internal successors, (1691), 8 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:06,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:06,560 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:06,560 INFO L175 Difference]: Start difference. First operand has 450 places, 1074 transitions, 25984 flow. Second operand 8 states and 1691 transitions. [2023-08-30 19:04:06,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1097 transitions, 28461 flow [2023-08-30 19:04:08,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1097 transitions, 27989 flow, removed 157 selfloop flow, removed 19 redundant places. [2023-08-30 19:04:08,556 INFO L231 Difference]: Finished difference. Result has 436 places, 1076 transitions, 25649 flow [2023-08-30 19:04:08,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=25512, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=25649, PETRI_PLACES=436, PETRI_TRANSITIONS=1076} [2023-08-30 19:04:08,557 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 415 predicate places. [2023-08-30 19:04:08,557 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1076 transitions, 25649 flow [2023-08-30 19:04:08,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:08,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:04:08,558 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:04:08,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-08-30 19:04:08,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:04:08,766 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:04:08,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:04:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2051486215, now seen corresponding path program 46 times [2023-08-30 19:04:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:04:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797033247] [2023-08-30 19:04:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:04:08,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:04:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:04:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:04:09,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:04:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797033247] [2023-08-30 19:04:09,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797033247] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:04:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747228490] [2023-08-30 19:04:09,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:04:09,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:04:09,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:04:09,473 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:04:09,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 19:04:09,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:04:09,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:04:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 19:04:09,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:04:10,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:04:10,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 133 [2023-08-30 19:04:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:04:10,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:04:12,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:04:12,907 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 361 treesize of output 212 [2023-08-30 19:04:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:04:13,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747228490] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:04:13,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:04:13,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 19:04:13,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930490638] [2023-08-30 19:04:13,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:04:13,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:04:13,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:04:13,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:04:13,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:04:15,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:04:15,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1076 transitions, 25649 flow. Second operand has 27 states, 27 states have (on average 195.8148148148148) internal successors, (5287), 27 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:15,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:04:15,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:04:15,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:04:24,074 INFO L130 PetriNetUnfolder]: 3448/7011 cut-off events. [2023-08-30 19:04:24,074 INFO L131 PetriNetUnfolder]: For 190618/190618 co-relation queries the response was YES. [2023-08-30 19:04:24,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65742 conditions, 7011 events. 3448/7011 cut-off events. For 190618/190618 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 58880 event pairs, 758 based on Foata normal form. 9/7020 useless extension candidates. Maximal degree in co-relation 65601. Up to 3850 conditions per place. [2023-08-30 19:04:24,148 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 888 selfloop transitions, 449 changer transitions 21/1358 dead transitions. [2023-08-30 19:04:24,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1358 transitions, 33327 flow [2023-08-30 19:04:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 19:04:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 19:04:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 7377 transitions. [2023-08-30 19:04:24,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.354765797826296 [2023-08-30 19:04:24,152 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 7377 transitions. [2023-08-30 19:04:24,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 7377 transitions. [2023-08-30 19:04:24,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:04:24,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 7377 transitions. [2023-08-30 19:04:24,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 199.3783783783784) internal successors, (7377), 37 states have internal predecessors, (7377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:24,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:24,165 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:24,165 INFO L175 Difference]: Start difference. First operand has 436 places, 1076 transitions, 25649 flow. Second operand 37 states and 7377 transitions. [2023-08-30 19:04:24,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1358 transitions, 33327 flow [2023-08-30 19:04:26,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1358 transitions, 33244 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 19:04:26,302 INFO L231 Difference]: Finished difference. Result has 476 places, 1197 transitions, 29697 flow [2023-08-30 19:04:26,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=25568, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=29697, PETRI_PLACES=476, PETRI_TRANSITIONS=1197} [2023-08-30 19:04:26,303 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 455 predicate places. [2023-08-30 19:04:26,304 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1197 transitions, 29697 flow [2023-08-30 19:04:26,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.8148148148148) internal successors, (5287), 27 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:26,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:04:26,305 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:04:26,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-30 19:04:26,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:04:26,511 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:04:26,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:04:26,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1744538243, now seen corresponding path program 47 times [2023-08-30 19:04:26,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:04:26,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416904004] [2023-08-30 19:04:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:04:26,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:04:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:04:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:04:27,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:04:27,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416904004] [2023-08-30 19:04:27,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416904004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:04:27,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767142599] [2023-08-30 19:04:27,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:04:27,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:04:27,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:04:27,207 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:04:27,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 19:04:27,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:04:27,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:04:27,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 19:04:27,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:04:28,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:04:28,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 126 [2023-08-30 19:04:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:04:28,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:04:30,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:04:30,734 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 213 [2023-08-30 19:04:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:04:31,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767142599] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:04:31,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:04:31,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 30 [2023-08-30 19:04:31,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081471463] [2023-08-30 19:04:31,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:04:31,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 19:04:31,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:04:31,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 19:04:31,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-08-30 19:04:33,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 562 [2023-08-30 19:04:33,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1197 transitions, 29697 flow. Second operand has 31 states, 31 states have (on average 193.8709677419355) internal successors, (6010), 31 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:33,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:04:33,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 562 [2023-08-30 19:04:33,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:04:43,251 INFO L130 PetriNetUnfolder]: 3651/7459 cut-off events. [2023-08-30 19:04:43,251 INFO L131 PetriNetUnfolder]: For 222256/222256 co-relation queries the response was YES. [2023-08-30 19:04:43,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73095 conditions, 7459 events. 3651/7459 cut-off events. For 222256/222256 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 63808 event pairs, 839 based on Foata normal form. 13/7472 useless extension candidates. Maximal degree in co-relation 72944. Up to 4356 conditions per place. [2023-08-30 19:04:43,334 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 941 selfloop transitions, 466 changer transitions 25/1432 dead transitions. [2023-08-30 19:04:43,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1432 transitions, 36724 flow [2023-08-30 19:04:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 19:04:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 19:04:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 8082 transitions. [2023-08-30 19:04:43,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507508028816943 [2023-08-30 19:04:43,339 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 8082 transitions. [2023-08-30 19:04:43,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 8082 transitions. [2023-08-30 19:04:43,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:04:43,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 8082 transitions. [2023-08-30 19:04:43,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 197.1219512195122) internal successors, (8082), 41 states have internal predecessors, (8082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:43,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:43,353 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:43,353 INFO L175 Difference]: Start difference. First operand has 476 places, 1197 transitions, 29697 flow. Second operand 41 states and 8082 transitions. [2023-08-30 19:04:43,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1432 transitions, 36724 flow [2023-08-30 19:04:46,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1432 transitions, 35889 flow, removed 398 selfloop flow, removed 10 redundant places. [2023-08-30 19:04:46,166 INFO L231 Difference]: Finished difference. Result has 519 places, 1290 transitions, 32655 flow [2023-08-30 19:04:46,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=28899, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=796, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=32655, PETRI_PLACES=519, PETRI_TRANSITIONS=1290} [2023-08-30 19:04:46,167 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 498 predicate places. [2023-08-30 19:04:46,167 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1290 transitions, 32655 flow [2023-08-30 19:04:46,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 193.8709677419355) internal successors, (6010), 31 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:46,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:04:46,168 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:04:46,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-30 19:04:46,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-08-30 19:04:46,369 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:04:46,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:04:46,369 INFO L85 PathProgramCache]: Analyzing trace with hash -131688167, now seen corresponding path program 48 times [2023-08-30 19:04:46,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:04:46,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974974950] [2023-08-30 19:04:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:04:46,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:04:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:04:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:04:47,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:04:47,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974974950] [2023-08-30 19:04:47,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974974950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:04:47,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359443755] [2023-08-30 19:04:47,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:04:47,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:04:47,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:04:47,621 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:04:47,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 19:04:47,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:04:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:04:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 19:04:47,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:04:48,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 84 [2023-08-30 19:04:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:04:48,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:04:49,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:04:49,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 137 [2023-08-30 19:04:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:04:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359443755] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:04:49,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:04:49,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-30 19:04:49,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773765036] [2023-08-30 19:04:49,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:04:49,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 19:04:49,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:04:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 19:04:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2023-08-30 19:04:52,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 562 [2023-08-30 19:04:52,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1290 transitions, 32655 flow. Second operand has 32 states, 32 states have (on average 187.59375) internal successors, (6003), 32 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:52,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:04:52,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 562 [2023-08-30 19:04:52,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:01,931 INFO L130 PetriNetUnfolder]: 3966/8108 cut-off events. [2023-08-30 19:05:01,931 INFO L131 PetriNetUnfolder]: For 255171/255171 co-relation queries the response was YES. [2023-08-30 19:05:01,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81258 conditions, 8108 events. 3966/8108 cut-off events. For 255171/255171 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 70497 event pairs, 910 based on Foata normal form. 39/8147 useless extension candidates. Maximal degree in co-relation 81092. Up to 4307 conditions per place. [2023-08-30 19:05:02,016 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1062 selfloop transitions, 451 changer transitions 47/1560 dead transitions. [2023-08-30 19:05:02,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 1560 transitions, 41470 flow [2023-08-30 19:05:02,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 19:05:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 19:05:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 7831 transitions. [2023-08-30 19:05:02,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3398576512455516 [2023-08-30 19:05:02,023 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 7831 transitions. [2023-08-30 19:05:02,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 7831 transitions. [2023-08-30 19:05:02,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:02,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 7831 transitions. [2023-08-30 19:05:02,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 191.0) internal successors, (7831), 41 states have internal predecessors, (7831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:02,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:02,039 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:02,039 INFO L175 Difference]: Start difference. First operand has 519 places, 1290 transitions, 32655 flow. Second operand 41 states and 7831 transitions. [2023-08-30 19:05:02,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 1560 transitions, 41470 flow [2023-08-30 19:05:05,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1560 transitions, 39635 flow, removed 348 selfloop flow, removed 18 redundant places. [2023-08-30 19:05:05,058 INFO L231 Difference]: Finished difference. Result has 547 places, 1402 transitions, 35645 flow [2023-08-30 19:05:05,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=30610, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=35645, PETRI_PLACES=547, PETRI_TRANSITIONS=1402} [2023-08-30 19:05:05,059 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 526 predicate places. [2023-08-30 19:05:05,059 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1402 transitions, 35645 flow [2023-08-30 19:05:05,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 187.59375) internal successors, (6003), 32 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:05,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:05,059 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:05,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-30 19:05:05,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-08-30 19:05:05,261 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:05:05,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash -195925735, now seen corresponding path program 49 times [2023-08-30 19:05:05,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:05,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506638055] [2023-08-30 19:05:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:05,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:05:05,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:05,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506638055] [2023-08-30 19:05:05,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506638055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:05:05,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790342174] [2023-08-30 19:05:05,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:05:05,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:05,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:05:05,916 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:05:05,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 19:05:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:06,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 19:05:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:05:06,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 112 [2023-08-30 19:05:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:05:06,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:05:08,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:05:08,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 355 treesize of output 215 [2023-08-30 19:05:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:05:08,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790342174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:05:08,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:05:08,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 27 [2023-08-30 19:05:08,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080451156] [2023-08-30 19:05:08,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:05:08,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 19:05:08,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:08,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 19:05:08,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-08-30 19:05:10,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 562 [2023-08-30 19:05:10,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1402 transitions, 35645 flow. Second operand has 28 states, 28 states have (on average 193.75) internal successors, (5425), 28 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:10,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:10,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 562 [2023-08-30 19:05:10,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:17,075 INFO L130 PetriNetUnfolder]: 4124/8285 cut-off events. [2023-08-30 19:05:17,075 INFO L131 PetriNetUnfolder]: For 269918/269918 co-relation queries the response was YES. [2023-08-30 19:05:17,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83964 conditions, 8285 events. 4124/8285 cut-off events. For 269918/269918 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 71093 event pairs, 613 based on Foata normal form. 6/8291 useless extension candidates. Maximal degree in co-relation 83786. Up to 3011 conditions per place. [2023-08-30 19:05:17,174 INFO L137 encePairwiseOnDemand]: 552/562 looper letters, 918 selfloop transitions, 651 changer transitions 19/1588 dead transitions. [2023-08-30 19:05:17,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1588 transitions, 42956 flow [2023-08-30 19:05:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 19:05:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 19:05:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6094 transitions. [2023-08-30 19:05:17,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497876248421536 [2023-08-30 19:05:17,178 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6094 transitions. [2023-08-30 19:05:17,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6094 transitions. [2023-08-30 19:05:17,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:17,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6094 transitions. [2023-08-30 19:05:17,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 196.58064516129033) internal successors, (6094), 31 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:17,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:17,188 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:17,188 INFO L175 Difference]: Start difference. First operand has 547 places, 1402 transitions, 35645 flow. Second operand 31 states and 6094 transitions. [2023-08-30 19:05:17,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1588 transitions, 42956 flow [2023-08-30 19:05:20,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 1588 transitions, 42032 flow, removed 414 selfloop flow, removed 18 redundant places. [2023-08-30 19:05:20,986 INFO L231 Difference]: Finished difference. Result has 566 places, 1514 transitions, 39639 flow [2023-08-30 19:05:20,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=34765, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=555, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=39639, PETRI_PLACES=566, PETRI_TRANSITIONS=1514} [2023-08-30 19:05:20,988 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 545 predicate places. [2023-08-30 19:05:20,988 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1514 transitions, 39639 flow [2023-08-30 19:05:20,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 193.75) internal successors, (5425), 28 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:20,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:20,989 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:20,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 19:05:21,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:21,190 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:05:21,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:21,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1146111613, now seen corresponding path program 50 times [2023-08-30 19:05:21,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:21,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264490018] [2023-08-30 19:05:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:21,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:05:22,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:22,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264490018] [2023-08-30 19:05:22,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264490018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:05:22,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14164657] [2023-08-30 19:05:22,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:05:22,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:22,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:05:22,243 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:05:22,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 19:05:22,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:05:22,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:05:22,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 19:05:22,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:05:23,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:05:23,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 86 [2023-08-30 19:05:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:05:23,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:05:25,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:05:25,610 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 360 treesize of output 188 [2023-08-30 19:05:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:05:25,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14164657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:05:25,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:05:25,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-30 19:05:25,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557144715] [2023-08-30 19:05:25,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:05:25,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 19:05:25,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 19:05:25,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:05:27,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:05:27,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1514 transitions, 39639 flow. Second operand has 26 states, 26 states have (on average 195.84615384615384) internal successors, (5092), 26 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:27,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:27,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:05:27,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:35,112 INFO L130 PetriNetUnfolder]: 4209/8422 cut-off events. [2023-08-30 19:05:35,113 INFO L131 PetriNetUnfolder]: For 290393/290393 co-relation queries the response was YES. [2023-08-30 19:05:35,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87118 conditions, 8422 events. 4209/8422 cut-off events. For 290393/290393 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 72307 event pairs, 732 based on Foata normal form. 8/8430 useless extension candidates. Maximal degree in co-relation 86939. Up to 3180 conditions per place. [2023-08-30 19:05:35,221 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1034 selfloop transitions, 580 changer transitions 25/1639 dead transitions. [2023-08-30 19:05:35,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 1639 transitions, 44515 flow [2023-08-30 19:05:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 19:05:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 19:05:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 7157 transitions. [2023-08-30 19:05:35,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3537465401344405 [2023-08-30 19:05:35,225 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 7157 transitions. [2023-08-30 19:05:35,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 7157 transitions. [2023-08-30 19:05:35,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:35,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 7157 transitions. [2023-08-30 19:05:35,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 198.80555555555554) internal successors, (7157), 36 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:35,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:35,237 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:35,237 INFO L175 Difference]: Start difference. First operand has 566 places, 1514 transitions, 39639 flow. Second operand 36 states and 7157 transitions. [2023-08-30 19:05:35,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 1639 transitions, 44515 flow [2023-08-30 19:05:39,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 1639 transitions, 43341 flow, removed 445 selfloop flow, removed 17 redundant places. [2023-08-30 19:05:39,478 INFO L231 Difference]: Finished difference. Result has 590 places, 1549 transitions, 40749 flow [2023-08-30 19:05:39,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=38481, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=956, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=40749, PETRI_PLACES=590, PETRI_TRANSITIONS=1549} [2023-08-30 19:05:39,479 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 569 predicate places. [2023-08-30 19:05:39,479 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 1549 transitions, 40749 flow [2023-08-30 19:05:39,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 195.84615384615384) internal successors, (5092), 26 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:39,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:39,480 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:39,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-30 19:05:39,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-30 19:05:39,687 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:05:39,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:39,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2034591411, now seen corresponding path program 51 times [2023-08-30 19:05:39,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:39,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630998887] [2023-08-30 19:05:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:39,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:05:40,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:40,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630998887] [2023-08-30 19:05:40,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630998887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:05:40,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530550663] [2023-08-30 19:05:40,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:05:40,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:40,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:05:40,512 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:05:40,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 19:05:40,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:05:40,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:05:40,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 19:05:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:05:41,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:05:41,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 123 [2023-08-30 19:05:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:05:42,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:05:44,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:05:44,175 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 347 treesize of output 211 [2023-08-30 19:05:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:05:44,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530550663] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:05:44,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:05:44,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2023-08-30 19:05:44,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898108069] [2023-08-30 19:05:44,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:05:44,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:05:44,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:44,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:05:44,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:05:46,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:05:46,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 1549 transitions, 40749 flow. Second operand has 30 states, 30 states have (on average 195.9) internal successors, (5877), 30 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:46,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:46,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:05:46,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:54,859 INFO L130 PetriNetUnfolder]: 4383/8793 cut-off events. [2023-08-30 19:05:54,860 INFO L131 PetriNetUnfolder]: For 315598/315598 co-relation queries the response was YES. [2023-08-30 19:05:54,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91956 conditions, 8793 events. 4383/8793 cut-off events. For 315598/315598 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 76302 event pairs, 746 based on Foata normal form. 7/8800 useless extension candidates. Maximal degree in co-relation 91770. Up to 3252 conditions per place. [2023-08-30 19:05:54,971 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1010 selfloop transitions, 682 changer transitions 13/1705 dead transitions. [2023-08-30 19:05:54,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 1705 transitions, 47634 flow [2023-08-30 19:05:54,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 19:05:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 19:05:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6166 transitions. [2023-08-30 19:05:54,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35392033061646194 [2023-08-30 19:05:54,975 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6166 transitions. [2023-08-30 19:05:54,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6166 transitions. [2023-08-30 19:05:54,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:54,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6166 transitions. [2023-08-30 19:05:54,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 198.90322580645162) internal successors, (6166), 31 states have internal predecessors, (6166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:54,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:54,986 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:54,986 INFO L175 Difference]: Start difference. First operand has 590 places, 1549 transitions, 40749 flow. Second operand 31 states and 6166 transitions. [2023-08-30 19:05:54,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 1705 transitions, 47634 flow [2023-08-30 19:05:59,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1705 transitions, 47179 flow, removed 173 selfloop flow, removed 16 redundant places. [2023-08-30 19:05:59,048 INFO L231 Difference]: Finished difference. Result has 608 places, 1610 transitions, 43876 flow [2023-08-30 19:05:59,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=40314, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=43876, PETRI_PLACES=608, PETRI_TRANSITIONS=1610} [2023-08-30 19:05:59,049 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 587 predicate places. [2023-08-30 19:05:59,049 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1610 transitions, 43876 flow [2023-08-30 19:05:59,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 195.9) internal successors, (5877), 30 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:59,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:59,050 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:59,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 19:05:59,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-30 19:05:59,251 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:05:59,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:59,251 INFO L85 PathProgramCache]: Analyzing trace with hash -956207045, now seen corresponding path program 52 times [2023-08-30 19:05:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:59,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908734910] [2023-08-30 19:05:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:59,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:06:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:00,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:06:00,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908734910] [2023-08-30 19:06:00,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908734910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:06:00,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90334422] [2023-08-30 19:06:00,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:06:00,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:06:00,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:06:00,048 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:06:00,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 19:06:00,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:06:00,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:06:00,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:06:00,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:06:00,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 112 [2023-08-30 19:06:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:00,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:06:02,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:06:02,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 200 [2023-08-30 19:06:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:03,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90334422] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:06:03,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:06:03,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 19:06:03,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668508298] [2023-08-30 19:06:03,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:06:03,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:06:03,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:06:03,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:06:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:06:05,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:06:05,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1610 transitions, 43876 flow. Second operand has 27 states, 27 states have (on average 195.85185185185185) internal successors, (5288), 27 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:05,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:06:05,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:06:05,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:06:15,815 INFO L130 PetriNetUnfolder]: 5064/9904 cut-off events. [2023-08-30 19:06:15,816 INFO L131 PetriNetUnfolder]: For 403831/403831 co-relation queries the response was YES. [2023-08-30 19:06:15,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109305 conditions, 9904 events. 5064/9904 cut-off events. For 403831/403831 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 85422 event pairs, 1002 based on Foata normal form. 11/9915 useless extension candidates. Maximal degree in co-relation 109112. Up to 4962 conditions per place. [2023-08-30 19:06:15,952 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 1314 selfloop transitions, 623 changer transitions 26/1963 dead transitions. [2023-08-30 19:06:15,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1963 transitions, 56683 flow [2023-08-30 19:06:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 19:06:15,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 19:06:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 7974 transitions. [2023-08-30 19:06:15,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3547153024911032 [2023-08-30 19:06:15,958 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 7974 transitions. [2023-08-30 19:06:15,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 7974 transitions. [2023-08-30 19:06:15,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:06:15,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 7974 transitions. [2023-08-30 19:06:15,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 199.35) internal successors, (7974), 40 states have internal predecessors, (7974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:15,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:15,975 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:15,975 INFO L175 Difference]: Start difference. First operand has 608 places, 1610 transitions, 43876 flow. Second operand 40 states and 7974 transitions. [2023-08-30 19:06:15,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1963 transitions, 56683 flow [2023-08-30 19:06:21,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 1963 transitions, 56194 flow, removed 224 selfloop flow, removed 13 redundant places. [2023-08-30 19:06:21,132 INFO L231 Difference]: Finished difference. Result has 645 places, 1809 transitions, 51704 flow [2023-08-30 19:06:21,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=43399, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=51704, PETRI_PLACES=645, PETRI_TRANSITIONS=1809} [2023-08-30 19:06:21,134 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 624 predicate places. [2023-08-30 19:06:21,134 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 1809 transitions, 51704 flow [2023-08-30 19:06:21,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.85185185185185) internal successors, (5288), 27 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:21,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:06:21,134 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:06:21,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-30 19:06:21,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:06:21,335 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:06:21,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:06:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1734035139, now seen corresponding path program 53 times [2023-08-30 19:06:21,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:06:21,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287228328] [2023-08-30 19:06:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:06:21,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:06:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:06:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:22,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:06:22,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287228328] [2023-08-30 19:06:22,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287228328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:06:22,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313567465] [2023-08-30 19:06:22,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:06:22,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:06:22,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:06:22,100 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:06:22,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 19:06:22,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:06:22,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:06:22,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 19:06:22,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:06:22,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 100 [2023-08-30 19:06:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:22,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:06:24,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:06:24,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 216 [2023-08-30 19:06:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:25,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313567465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:06:25,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:06:25,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-08-30 19:06:25,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571546217] [2023-08-30 19:06:25,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:06:25,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:06:25,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:06:25,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:06:25,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:06:27,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:06:27,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1809 transitions, 51704 flow. Second operand has 27 states, 27 states have (on average 195.8148148148148) internal successors, (5287), 27 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:27,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:06:27,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:06:27,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:06:37,873 INFO L130 PetriNetUnfolder]: 5221/10184 cut-off events. [2023-08-30 19:06:37,873 INFO L131 PetriNetUnfolder]: For 442274/442274 co-relation queries the response was YES. [2023-08-30 19:06:37,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116369 conditions, 10184 events. 5221/10184 cut-off events. For 442274/442274 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 87950 event pairs, 801 based on Foata normal form. 24/10208 useless extension candidates. Maximal degree in co-relation 116163. Up to 3528 conditions per place. [2023-08-30 19:06:38,010 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1231 selfloop transitions, 735 changer transitions 17/1983 dead transitions. [2023-08-30 19:06:38,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 1983 transitions, 60096 flow [2023-08-30 19:06:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 19:06:38,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 19:06:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5778 transitions. [2023-08-30 19:06:38,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35452202724260645 [2023-08-30 19:06:38,014 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5778 transitions. [2023-08-30 19:06:38,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5778 transitions. [2023-08-30 19:06:38,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:06:38,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5778 transitions. [2023-08-30 19:06:38,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 199.24137931034483) internal successors, (5778), 29 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:38,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 562.0) internal successors, (16860), 30 states have internal predecessors, (16860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:38,024 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 562.0) internal successors, (16860), 30 states have internal predecessors, (16860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:38,024 INFO L175 Difference]: Start difference. First operand has 645 places, 1809 transitions, 51704 flow. Second operand 29 states and 5778 transitions. [2023-08-30 19:06:38,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 1983 transitions, 60096 flow [2023-08-30 19:06:43,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 1983 transitions, 58103 flow, removed 953 selfloop flow, removed 14 redundant places. [2023-08-30 19:06:43,622 INFO L231 Difference]: Finished difference. Result has 664 places, 1892 transitions, 54797 flow [2023-08-30 19:06:43,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=49579, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=54797, PETRI_PLACES=664, PETRI_TRANSITIONS=1892} [2023-08-30 19:06:43,623 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 643 predicate places. [2023-08-30 19:06:43,623 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1892 transitions, 54797 flow [2023-08-30 19:06:43,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.8148148148148) internal successors, (5287), 27 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:43,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:06:43,624 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:06:43,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-30 19:06:43,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:06:43,824 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:06:43,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:06:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash -649434927, now seen corresponding path program 54 times [2023-08-30 19:06:43,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:06:43,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117462934] [2023-08-30 19:06:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:06:43,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:06:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:06:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:44,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:06:44,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117462934] [2023-08-30 19:06:44,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117462934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:06:44,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508263059] [2023-08-30 19:06:44,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:06:44,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:06:44,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:06:44,508 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:06:44,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-30 19:06:44,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:06:44,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:06:44,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 19:06:44,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:06:45,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:06:45,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 86 [2023-08-30 19:06:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:45,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:06:48,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:06:48,061 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 347 treesize of output 211 [2023-08-30 19:06:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:48,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508263059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:06:48,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:06:48,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 19:06:48,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014272143] [2023-08-30 19:06:48,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:06:48,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:06:48,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:06:48,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:06:48,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:06:50,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:06:50,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1892 transitions, 54797 flow. Second operand has 27 states, 27 states have (on average 195.74074074074073) internal successors, (5285), 27 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:50,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:06:50,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:06:50,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:07:00,787 INFO L130 PetriNetUnfolder]: 5326/10362 cut-off events. [2023-08-30 19:07:00,787 INFO L131 PetriNetUnfolder]: For 463816/463816 co-relation queries the response was YES. [2023-08-30 19:07:00,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119532 conditions, 10362 events. 5326/10362 cut-off events. For 463816/463816 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 89578 event pairs, 844 based on Foata normal form. 9/10371 useless extension candidates. Maximal degree in co-relation 119320. Up to 3780 conditions per place. [2023-08-30 19:07:00,922 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1199 selfloop transitions, 833 changer transitions 22/2054 dead transitions. [2023-08-30 19:07:00,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 2054 transitions, 63044 flow [2023-08-30 19:07:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 19:07:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 19:07:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5368 transitions. [2023-08-30 19:07:00,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35376301568472385 [2023-08-30 19:07:00,926 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5368 transitions. [2023-08-30 19:07:00,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5368 transitions. [2023-08-30 19:07:00,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:07:00,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5368 transitions. [2023-08-30 19:07:00,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 198.8148148148148) internal successors, (5368), 27 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:00,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:00,935 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:00,935 INFO L175 Difference]: Start difference. First operand has 664 places, 1892 transitions, 54797 flow. Second operand 27 states and 5368 transitions. [2023-08-30 19:07:00,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 2054 transitions, 63044 flow [2023-08-30 19:07:06,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 2054 transitions, 62329 flow, removed 307 selfloop flow, removed 19 redundant places. [2023-08-30 19:07:06,849 INFO L231 Difference]: Finished difference. Result has 683 places, 1966 transitions, 59469 flow [2023-08-30 19:07:06,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=54090, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=762, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1092, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=59469, PETRI_PLACES=683, PETRI_TRANSITIONS=1966} [2023-08-30 19:07:06,850 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 662 predicate places. [2023-08-30 19:07:06,850 INFO L495 AbstractCegarLoop]: Abstraction has has 683 places, 1966 transitions, 59469 flow [2023-08-30 19:07:06,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.74074074074073) internal successors, (5285), 27 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:06,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:07:06,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:07:06,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-30 19:07:07,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:07:07,053 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:07:07,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:07:07,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1697031517, now seen corresponding path program 55 times [2023-08-30 19:07:07,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:07:07,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78567165] [2023-08-30 19:07:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:07:07,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:07:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:07:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:07:07,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:07:07,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78567165] [2023-08-30 19:07:07,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78567165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:07:07,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790258426] [2023-08-30 19:07:07,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:07:07,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:07:07,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:07:07,867 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:07:07,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-30 19:07:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:07:08,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 19:07:08,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:07:08,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:07:08,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 118 [2023-08-30 19:07:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:07:08,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:07:10,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:07:10,888 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 315 treesize of output 195 [2023-08-30 19:07:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:07:11,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790258426] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:07:11,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:07:11,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-30 19:07:11,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46305319] [2023-08-30 19:07:11,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:07:11,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 19:07:11,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:07:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 19:07:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-08-30 19:07:14,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-08-30 19:07:14,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 1966 transitions, 59469 flow. Second operand has 32 states, 32 states have (on average 186.65625) internal successors, (5973), 32 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:14,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:07:14,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-08-30 19:07:14,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:07:29,344 INFO L130 PetriNetUnfolder]: 5350/10392 cut-off events. [2023-08-30 19:07:29,344 INFO L131 PetriNetUnfolder]: For 527893/527893 co-relation queries the response was YES. [2023-08-30 19:07:29,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124174 conditions, 10392 events. 5350/10392 cut-off events. For 527893/527893 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 89739 event pairs, 668 based on Foata normal form. 4/10396 useless extension candidates. Maximal degree in co-relation 123951. Up to 3187 conditions per place. [2023-08-30 19:07:29,483 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 868 selfloop transitions, 1208 changer transitions 7/2083 dead transitions. [2023-08-30 19:07:29,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 2083 transitions, 65648 flow [2023-08-30 19:07:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 19:07:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 19:07:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 7568 transitions. [2023-08-30 19:07:29,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3366548042704626 [2023-08-30 19:07:29,488 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 7568 transitions. [2023-08-30 19:07:29,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 7568 transitions. [2023-08-30 19:07:29,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:07:29,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 7568 transitions. [2023-08-30 19:07:29,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 189.2) internal successors, (7568), 40 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:29,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:29,501 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:29,501 INFO L175 Difference]: Start difference. First operand has 683 places, 1966 transitions, 59469 flow. Second operand 40 states and 7568 transitions. [2023-08-30 19:07:29,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 2083 transitions, 65648 flow [2023-08-30 19:07:36,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 2083 transitions, 65094 flow, removed 241 selfloop flow, removed 13 redundant places. [2023-08-30 19:07:36,944 INFO L231 Difference]: Finished difference. Result has 708 places, 2010 transitions, 62946 flow [2023-08-30 19:07:36,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=58941, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=62946, PETRI_PLACES=708, PETRI_TRANSITIONS=2010} [2023-08-30 19:07:36,945 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 687 predicate places. [2023-08-30 19:07:36,945 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 2010 transitions, 62946 flow [2023-08-30 19:07:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 186.65625) internal successors, (5973), 32 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:36,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:07:36,946 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:07:36,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-30 19:07:37,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:07:37,147 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:07:37,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:07:37,147 INFO L85 PathProgramCache]: Analyzing trace with hash 962861267, now seen corresponding path program 56 times [2023-08-30 19:07:37,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:07:37,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985483182] [2023-08-30 19:07:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:07:37,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:07:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:07:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:07:38,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:07:38,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985483182] [2023-08-30 19:07:38,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985483182] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:07:38,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681465454] [2023-08-30 19:07:38,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:07:38,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:07:38,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:07:38,072 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:07:38,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-30 19:07:38,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:07:38,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:07:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 19:07:38,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:07:39,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:07:39,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 121 [2023-08-30 19:07:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:07:39,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:07:41,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:07:41,924 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 332 treesize of output 203 [2023-08-30 19:07:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:07:42,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681465454] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:07:42,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:07:42,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-30 19:07:42,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650039008] [2023-08-30 19:07:42,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:07:42,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 19:07:42,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:07:42,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 19:07:42,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2023-08-30 19:07:45,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-08-30 19:07:45,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 2010 transitions, 62946 flow. Second operand has 32 states, 32 states have (on average 186.6875) internal successors, (5974), 32 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:45,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:07:45,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-08-30 19:07:45,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:08:00,612 INFO L130 PetriNetUnfolder]: 5528/10726 cut-off events. [2023-08-30 19:08:00,613 INFO L131 PetriNetUnfolder]: For 585054/585054 co-relation queries the response was YES. [2023-08-30 19:08:00,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131969 conditions, 10726 events. 5528/10726 cut-off events. For 585054/585054 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 92967 event pairs, 1199 based on Foata normal form. 13/10739 useless extension candidates. Maximal degree in co-relation 131745. Up to 6082 conditions per place. [2023-08-30 19:08:00,764 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1451 selfloop transitions, 748 changer transitions 23/2222 dead transitions. [2023-08-30 19:08:00,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 2222 transitions, 72174 flow [2023-08-30 19:08:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 19:08:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 19:08:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 7975 transitions. [2023-08-30 19:08:00,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33786646331130316 [2023-08-30 19:08:00,770 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 7975 transitions. [2023-08-30 19:08:00,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 7975 transitions. [2023-08-30 19:08:00,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:08:00,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 7975 transitions. [2023-08-30 19:08:00,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 189.88095238095238) internal successors, (7975), 42 states have internal predecessors, (7975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:08:00,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:08:00,784 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:08:00,784 INFO L175 Difference]: Start difference. First operand has 708 places, 2010 transitions, 62946 flow. Second operand 42 states and 7975 transitions. [2023-08-30 19:08:00,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 2222 transitions, 72174 flow [2023-08-30 19:08:08,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 2222 transitions, 69362 flow, removed 217 selfloop flow, removed 28 redundant places. [2023-08-30 19:08:08,985 INFO L231 Difference]: Finished difference. Result has 729 places, 2079 transitions, 64213 flow [2023-08-30 19:08:08,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=60239, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=64213, PETRI_PLACES=729, PETRI_TRANSITIONS=2079} [2023-08-30 19:08:08,986 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 708 predicate places. [2023-08-30 19:08:08,986 INFO L495 AbstractCegarLoop]: Abstraction has has 729 places, 2079 transitions, 64213 flow [2023-08-30 19:08:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 186.6875) internal successors, (5974), 32 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:08:08,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:08:08,987 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:08:08,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-30 19:08:09,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-08-30 19:08:09,188 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:08:09,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:08:09,188 INFO L85 PathProgramCache]: Analyzing trace with hash 939150035, now seen corresponding path program 57 times [2023-08-30 19:08:09,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:08:09,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269938326] [2023-08-30 19:08:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:08:09,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:08:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:08:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:08:09,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:08:09,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269938326] [2023-08-30 19:08:09,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269938326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:08:09,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115226048] [2023-08-30 19:08:09,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:08:09,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:08:09,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:08:09,780 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:08:09,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-30 19:08:09,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:08:09,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:08:09,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 19:08:09,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:08:10,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:08:10,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 134 [2023-08-30 19:08:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:08:11,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:08:12,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:08:12,454 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 257 treesize of output 163 [2023-08-30 19:08:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:08:12,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115226048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:08:12,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:08:12,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-08-30 19:08:12,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074340585] [2023-08-30 19:08:12,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:08:12,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 19:08:12,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:08:12,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 19:08:12,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2023-08-30 19:08:14,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 562 [2023-08-30 19:08:14,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 2079 transitions, 64213 flow. Second operand has 29 states, 29 states have (on average 196.82758620689654) internal successors, (5708), 29 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:08:14,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:08:14,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 562 [2023-08-30 19:08:14,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:08:27,222 INFO L130 PetriNetUnfolder]: 5554/10767 cut-off events. [2023-08-30 19:08:27,222 INFO L131 PetriNetUnfolder]: For 554874/554874 co-relation queries the response was YES. [2023-08-30 19:08:27,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130728 conditions, 10767 events. 5554/10767 cut-off events. For 554874/554874 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 93464 event pairs, 16 based on Foata normal form. 6/10773 useless extension candidates. Maximal degree in co-relation 130496. Up to 5198 conditions per place. [2023-08-30 19:08:27,372 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1215 selfloop transitions, 1061 changer transitions 12/2288 dead transitions. [2023-08-30 19:08:27,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 759 places, 2288 transitions, 72763 flow [2023-08-30 19:08:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 19:08:27,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 19:08:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6792 transitions. [2023-08-30 19:08:27,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35545321331379526 [2023-08-30 19:08:27,377 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6792 transitions. [2023-08-30 19:08:27,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6792 transitions. [2023-08-30 19:08:27,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:08:27,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6792 transitions. [2023-08-30 19:08:27,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 199.76470588235293) internal successors, (6792), 34 states have internal predecessors, (6792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:08:27,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 562.0) internal successors, (19670), 35 states have internal predecessors, (19670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:08:27,388 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 562.0) internal successors, (19670), 35 states have internal predecessors, (19670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:08:27,388 INFO L175 Difference]: Start difference. First operand has 729 places, 2079 transitions, 64213 flow. Second operand 34 states and 6792 transitions. [2023-08-30 19:08:27,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 759 places, 2288 transitions, 72763 flow [2023-08-30 19:08:34,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 2288 transitions, 71782 flow, removed 262 selfloop flow, removed 29 redundant places. [2023-08-30 19:08:34,635 INFO L231 Difference]: Finished difference. Result has 739 places, 2109 transitions, 66480 flow [2023-08-30 19:08:34,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=63306, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1036, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=66480, PETRI_PLACES=739, PETRI_TRANSITIONS=2109} [2023-08-30 19:08:34,636 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 718 predicate places. [2023-08-30 19:08:34,636 INFO L495 AbstractCegarLoop]: Abstraction has has 739 places, 2109 transitions, 66480 flow [2023-08-30 19:08:34,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 196.82758620689654) internal successors, (5708), 29 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:08:34,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:08:34,637 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:08:34,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-30 19:08:34,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2023-08-30 19:08:34,838 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:08:34,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:08:34,838 INFO L85 PathProgramCache]: Analyzing trace with hash 160769689, now seen corresponding path program 58 times [2023-08-30 19:08:34,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:08:34,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712401727] [2023-08-30 19:08:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:08:34,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:08:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:08:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:08:35,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:08:35,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712401727] [2023-08-30 19:08:35,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712401727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:08:35,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382297511] [2023-08-30 19:08:35,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:08:35,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:08:35,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:08:35,713 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:08:35,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-30 19:08:35,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:08:35,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:08:35,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 19:08:35,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:08:36,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:08:36,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 86 [2023-08-30 19:08:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:08:36,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:08:39,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:08:39,248 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 330 treesize of output 209 [2023-08-30 19:08:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:08:39,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382297511] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:08:39,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:08:39,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-30 19:08:39,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298529441] [2023-08-30 19:08:39,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:08:39,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 19:08:39,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:08:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 19:08:39,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-08-30 19:08:42,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-08-30 19:08:42,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 2109 transitions, 66480 flow. Second operand has 32 states, 32 states have (on average 186.65625) internal successors, (5973), 32 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:08:42,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:08:42,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-08-30 19:08:42,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:09:11,112 INFO L130 PetriNetUnfolder]: 8237/16477 cut-off events. [2023-08-30 19:09:11,112 INFO L131 PetriNetUnfolder]: For 905891/905891 co-relation queries the response was YES. [2023-08-30 19:09:11,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203616 conditions, 16477 events. 8237/16477 cut-off events. For 905891/905891 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 155549 event pairs, 378 based on Foata normal form. 9/16486 useless extension candidates. Maximal degree in co-relation 203382. Up to 4330 conditions per place. [2023-08-30 19:09:11,350 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 2130 selfloop transitions, 1224 changer transitions 34/3388 dead transitions. [2023-08-30 19:09:11,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 3388 transitions, 112413 flow [2023-08-30 19:09:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-30 19:09:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-30 19:09:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 10415 transitions. [2023-08-30 19:09:11,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3369459721772889 [2023-08-30 19:09:11,356 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 10415 transitions. [2023-08-30 19:09:11,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 10415 transitions. [2023-08-30 19:09:11,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:09:11,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 10415 transitions. [2023-08-30 19:09:11,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 189.36363636363637) internal successors, (10415), 55 states have internal predecessors, (10415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:09:11,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 562.0) internal successors, (31472), 56 states have internal predecessors, (31472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:09:11,375 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 562.0) internal successors, (31472), 56 states have internal predecessors, (31472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:09:11,375 INFO L175 Difference]: Start difference. First operand has 739 places, 2109 transitions, 66480 flow. Second operand 55 states and 10415 transitions. [2023-08-30 19:09:11,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 3388 transitions, 112413 flow [2023-08-30 19:09:24,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 3388 transitions, 110001 flow, removed 468 selfloop flow, removed 13 redundant places. [2023-08-30 19:09:25,059 INFO L231 Difference]: Finished difference. Result has 801 places, 2537 transitions, 82070 flow [2023-08-30 19:09:25,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=64924, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=82070, PETRI_PLACES=801, PETRI_TRANSITIONS=2537} [2023-08-30 19:09:25,061 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 780 predicate places. [2023-08-30 19:09:25,062 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 2537 transitions, 82070 flow [2023-08-30 19:09:25,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 186.65625) internal successors, (5973), 32 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:09:25,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:09:25,063 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:09:25,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-30 19:09:25,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:09:25,278 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:09:25,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:09:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1426630437, now seen corresponding path program 59 times [2023-08-30 19:09:25,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:09:25,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184528643] [2023-08-30 19:09:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:09:25,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:09:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:09:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:09:25,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:09:25,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184528643] [2023-08-30 19:09:25,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184528643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:09:25,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385898604] [2023-08-30 19:09:25,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:09:25,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:09:25,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:09:25,915 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:09:25,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-30 19:09:26,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:09:26,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:09:26,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 19:09:26,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:09:26,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 113 [2023-08-30 19:09:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:09:26,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:09:28,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:09:28,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 197 [2023-08-30 19:09:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:09:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385898604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:09:28,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:09:28,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-08-30 19:09:28,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953888279] [2023-08-30 19:09:28,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:09:28,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:09:28,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:09:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:09:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:09:30,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-30 19:09:30,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 2537 transitions, 82070 flow. Second operand has 27 states, 27 states have (on average 195.7037037037037) internal successors, (5284), 27 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:09:30,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:09:30,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-30 19:09:30,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:09:49,312 INFO L130 PetriNetUnfolder]: 8856/17886 cut-off events. [2023-08-30 19:09:49,312 INFO L131 PetriNetUnfolder]: For 1024379/1024379 co-relation queries the response was YES. [2023-08-30 19:09:49,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230688 conditions, 17886 events. 8856/17886 cut-off events. For 1024379/1024379 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 172513 event pairs, 2298 based on Foata normal form. 25/17911 useless extension candidates. Maximal degree in co-relation 230432. Up to 9799 conditions per place. [2023-08-30 19:09:49,626 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 2169 selfloop transitions, 640 changer transitions 32/2841 dead transitions. [2023-08-30 19:09:49,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 2841 transitions, 98102 flow [2023-08-30 19:09:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 19:09:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 19:09:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5586 transitions. [2023-08-30 19:09:49,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35498220640569395 [2023-08-30 19:09:49,630 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5586 transitions. [2023-08-30 19:09:49,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5586 transitions. [2023-08-30 19:09:49,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:09:49,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5586 transitions. [2023-08-30 19:09:49,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 199.5) internal successors, (5586), 28 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:09:49,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:09:49,639 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:09:49,640 INFO L175 Difference]: Start difference. First operand has 801 places, 2537 transitions, 82070 flow. Second operand 28 states and 5586 transitions. [2023-08-30 19:09:49,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 2841 transitions, 98102 flow [2023-08-30 19:10:09,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 2841 transitions, 95818 flow, removed 788 selfloop flow, removed 21 redundant places. [2023-08-30 19:10:10,053 INFO L231 Difference]: Finished difference. Result has 812 places, 2673 transitions, 88257 flow [2023-08-30 19:10:10,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=80169, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=88257, PETRI_PLACES=812, PETRI_TRANSITIONS=2673} [2023-08-30 19:10:10,056 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 791 predicate places. [2023-08-30 19:10:10,056 INFO L495 AbstractCegarLoop]: Abstraction has has 812 places, 2673 transitions, 88257 flow [2023-08-30 19:10:10,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.7037037037037) internal successors, (5284), 27 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:10:10,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:10:10,057 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:10:10,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-30 19:10:10,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:10:10,261 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:10:10,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:10:10,261 INFO L85 PathProgramCache]: Analyzing trace with hash -129823397, now seen corresponding path program 60 times [2023-08-30 19:10:10,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:10:10,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174900150] [2023-08-30 19:10:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:10:10,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:10:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:10:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:10:11,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:10:11,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174900150] [2023-08-30 19:10:11,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174900150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:10:11,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925161298] [2023-08-30 19:10:11,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:10:11,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:10:11,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:10:11,196 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:10:11,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-30 19:10:11,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:10:11,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:10:11,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 19:10:11,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:10:12,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:10:12,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 116 [2023-08-30 19:10:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:10:12,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:10:15,028 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:10:15,028 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 279 treesize of output 189 [2023-08-30 19:10:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:10:15,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925161298] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:10:15,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:10:15,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-30 19:10:15,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258356117] [2023-08-30 19:10:15,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:10:15,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 19:10:15,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:10:15,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 19:10:15,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2023-08-30 19:10:18,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-08-30 19:10:18,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 812 places, 2673 transitions, 88257 flow. Second operand has 32 states, 32 states have (on average 186.6875) internal successors, (5974), 32 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:10:18,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:10:18,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-08-30 19:10:18,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:10:39,545 INFO L130 PetriNetUnfolder]: 8881/17887 cut-off events. [2023-08-30 19:10:39,545 INFO L131 PetriNetUnfolder]: For 1065719/1065719 co-relation queries the response was YES. [2023-08-30 19:10:39,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231270 conditions, 17887 events. 8881/17887 cut-off events. For 1065719/1065719 co-relation queries the response was YES. Maximal size of possible extension queue 1296. Compared 172111 event pairs, 1728 based on Foata normal form. 7/17894 useless extension candidates. Maximal degree in co-relation 231010. Up to 8774 conditions per place. [2023-08-30 19:10:39,850 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1731 selfloop transitions, 1035 changer transitions 17/2783 dead transitions. [2023-08-30 19:10:39,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 838 places, 2783 transitions, 96474 flow [2023-08-30 19:10:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 19:10:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 19:10:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5682 transitions. [2023-08-30 19:10:39,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33701067615658364 [2023-08-30 19:10:39,854 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5682 transitions. [2023-08-30 19:10:39,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5682 transitions. [2023-08-30 19:10:39,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:10:39,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5682 transitions. [2023-08-30 19:10:39,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 189.4) internal successors, (5682), 30 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:10:39,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 562.0) internal successors, (17422), 31 states have internal predecessors, (17422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:10:39,864 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 562.0) internal successors, (17422), 31 states have internal predecessors, (17422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:10:39,864 INFO L175 Difference]: Start difference. First operand has 812 places, 2673 transitions, 88257 flow. Second operand 30 states and 5682 transitions. [2023-08-30 19:10:39,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 838 places, 2783 transitions, 96474 flow [2023-08-30 19:11:01,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 2783 transitions, 95260 flow, removed 517 selfloop flow, removed 15 redundant places. [2023-08-30 19:11:01,436 INFO L231 Difference]: Finished difference. Result has 829 places, 2713 transitions, 91046 flow [2023-08-30 19:11:01,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=87055, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=91046, PETRI_PLACES=829, PETRI_TRANSITIONS=2713} [2023-08-30 19:11:01,439 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 808 predicate places. [2023-08-30 19:11:01,439 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2713 transitions, 91046 flow [2023-08-30 19:11:01,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 186.6875) internal successors, (5974), 32 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:11:01,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:11:01,440 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:11:01,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-30 19:11:01,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-30 19:11:01,647 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:11:01,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:11:01,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1354907421, now seen corresponding path program 61 times [2023-08-30 19:11:01,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:11:01,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710461571] [2023-08-30 19:11:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:11:01,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:11:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:11:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:11:02,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:11:02,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710461571] [2023-08-30 19:11:02,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710461571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:11:02,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943053355] [2023-08-30 19:11:02,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:11:02,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:11:02,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:11:02,384 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:11:02,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-30 19:11:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:11:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 19:11:02,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:11:03,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:11:03,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 118 [2023-08-30 19:11:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:11:03,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:11:05,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:11:05,945 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 353 treesize of output 213 [2023-08-30 19:11:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:11:06,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943053355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:11:06,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:11:06,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-08-30 19:11:06,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632714594] [2023-08-30 19:11:06,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:11:06,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 19:11:06,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:11:06,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 19:11:06,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2023-08-30 19:11:08,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 562 [2023-08-30 19:11:08,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2713 transitions, 91046 flow. Second operand has 29 states, 29 states have (on average 196.89655172413794) internal successors, (5710), 29 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:11:08,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:11:08,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 562 [2023-08-30 19:11:08,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:11:30,627 INFO L130 PetriNetUnfolder]: 9027/18186 cut-off events. [2023-08-30 19:11:30,627 INFO L131 PetriNetUnfolder]: For 1144331/1144331 co-relation queries the response was YES. [2023-08-30 19:11:30,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238724 conditions, 18186 events. 9027/18186 cut-off events. For 1144331/1144331 co-relation queries the response was YES. Maximal size of possible extension queue 1318. Compared 175438 event pairs, 1686 based on Foata normal form. 34/18220 useless extension candidates. Maximal degree in co-relation 238458. Up to 7733 conditions per place. [2023-08-30 19:11:30,930 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 1818 selfloop transitions, 1044 changer transitions 23/2885 dead transitions. [2023-08-30 19:11:30,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 852 places, 2885 transitions, 102098 flow [2023-08-30 19:11:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 19:11:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 19:11:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5408 transitions. [2023-08-30 19:11:30,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35639910373006456 [2023-08-30 19:11:30,934 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5408 transitions. [2023-08-30 19:11:30,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5408 transitions. [2023-08-30 19:11:30,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:11:30,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5408 transitions. [2023-08-30 19:11:30,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 200.2962962962963) internal successors, (5408), 27 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:11:30,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:11:30,944 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:11:30,944 INFO L175 Difference]: Start difference. First operand has 829 places, 2713 transitions, 91046 flow. Second operand 27 states and 5408 transitions. [2023-08-30 19:11:30,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 852 places, 2885 transitions, 102098 flow Killed by 15