./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1.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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:26:34,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:26:34,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:26:34,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:26:34,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:26:34,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:26:34,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:26:34,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:26:34,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:26:34,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:26:34,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:26:34,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:26:34,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:26:34,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:26:34,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:26:34,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:26:34,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:26:34,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:26:34,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:26:34,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:26:34,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:26:34,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:26:34,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:26:34,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:26:34,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:26:34,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:26:34,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:26:34,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:26:34,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:26:34,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:26:34,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:26:34,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:26:34,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:26:34,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:26:34,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:26:34,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:26:34,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:26:34,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:26:34,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:26:34,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:26:34,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:26:34,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:26:34,226 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:26:34,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:26:34,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:26:34,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:26:34,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:26:34,228 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:26:34,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:26:34,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:26:34,229 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:26:34,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:26:34,230 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:26:34,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:26:34,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:26:34,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:26:34,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:26:34,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:26:34,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:26:34,231 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:26:34,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:26:34,232 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:26:34,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:26:34,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:26:34,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:26:34,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:26:34,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:26:34,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:26:34,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:26:34,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:26:34,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:26:34,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:26:34,234 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:26:34,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:26:34,235 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:26:34,235 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:26:34,235 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:26:34,236 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:26:34,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:26:34,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:26:34,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:26:34,542 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:26:34,543 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:26:34,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-09-01 13:26:35,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:26:35,788 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:26:35,788 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-09-01 13:26:35,794 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8998143/d728aa32d37342e6a7db1223000d7500/FLAG7c99d6c07 [2023-09-01 13:26:35,806 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8998143/d728aa32d37342e6a7db1223000d7500 [2023-09-01 13:26:35,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:26:35,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:26:35,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:26:35,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:26:35,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:26:35,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:26:35" (1/1) ... [2023-09-01 13:26:35,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1023a760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:35, skipping insertion in model container [2023-09-01 13:26:35,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:26:35" (1/1) ... [2023-09-01 13:26:35,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:26:35,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:26:35,992 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/popl20-figure1.wvr.c[1991,2004] [2023-09-01 13:26:35,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:26:36,005 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:26:36,026 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/popl20-figure1.wvr.c[1991,2004] [2023-09-01 13:26:36,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:26:36,039 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:26:36,039 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:26:36,045 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:26:36,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36 WrapperNode [2023-09-01 13:26:36,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:26:36,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:26:36,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:26:36,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:26:36,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (1/1) ... [2023-09-01 13:26:36,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (1/1) ... [2023-09-01 13:26:36,097 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2023-09-01 13:26:36,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:26:36,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:26:36,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:26:36,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:26:36,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (1/1) ... [2023-09-01 13:26:36,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (1/1) ... [2023-09-01 13:26:36,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (1/1) ... [2023-09-01 13:26:36,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (1/1) ... [2023-09-01 13:26:36,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (1/1) ... [2023-09-01 13:26:36,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (1/1) ... [2023-09-01 13:26:36,133 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (1/1) ... [2023-09-01 13:26:36,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (1/1) ... [2023-09-01 13:26:36,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:26:36,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:26:36,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:26:36,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:26:36,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (1/1) ... [2023-09-01 13:26:36,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:26:36,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:36,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 13:26:36,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 13:26:36,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:26:36,216 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:26:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:26:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:26:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:26:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:26:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:26:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:26:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:26:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:26:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:26:36,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:26:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:26:36,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:26:36,220 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:26:36,322 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:26:36,324 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:26:36,513 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:26:36,544 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:26:36,548 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 13:26:36,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:26:36 BoogieIcfgContainer [2023-09-01 13:26:36,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:26:36,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:26:36,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:26:36,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:26:36,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:26:35" (1/3) ... [2023-09-01 13:26:36,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e01952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:26:36, skipping insertion in model container [2023-09-01 13:26:36,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:26:36" (2/3) ... [2023-09-01 13:26:36,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e01952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:26:36, skipping insertion in model container [2023-09-01 13:26:36,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:26:36" (3/3) ... [2023-09-01 13:26:36,557 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-09-01 13:26:36,563 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:26:36,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:26:36,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:26:36,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:26:36,643 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 13:26:36,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 162 flow [2023-09-01 13:26:36,740 INFO L130 PetriNetUnfolder]: 5/71 cut-off events. [2023-09-01 13:26:36,744 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:26:36,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 5/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-09-01 13:26:36,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 162 flow [2023-09-01 13:26:36,756 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 63 transitions, 138 flow [2023-09-01 13:26:36,759 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:26:36,770 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 63 transitions, 138 flow [2023-09-01 13:26:36,774 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 63 transitions, 138 flow [2023-09-01 13:26:36,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 63 transitions, 138 flow [2023-09-01 13:26:36,818 INFO L130 PetriNetUnfolder]: 5/63 cut-off events. [2023-09-01 13:26:36,818 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:26:36,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 63 events. 5/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-09-01 13:26:36,820 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-09-01 13:26:38,338 INFO L134 LiptonReduction]: Checked pairs total: 535 [2023-09-01 13:26:38,339 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-09-01 13:26:38,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:26:38,354 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;@25640e4c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:26:38,354 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 13:26:38,365 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-09-01 13:26:38,365 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:26:38,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:38,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:38,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:38,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash -553565742, now seen corresponding path program 1 times [2023-09-01 13:26:38,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:38,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59872717] [2023-09-01 13:26:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:38,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:38,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59872717] [2023-09-01 13:26:38,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59872717] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:26:38,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:26:38,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 13:26:38,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223250787] [2023-09-01 13:26:38,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:26:38,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:26:38,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:38,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:26:38,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:26:38,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2023-09-01 13:26:38,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:38,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:38,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2023-09-01 13:26:38,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:38,869 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-09-01 13:26:38,869 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 13:26:38,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 260 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-09-01 13:26:38,871 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-09-01 13:26:38,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-09-01 13:26:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:26:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:26:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-09-01 13:26:38,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-09-01 13:26:38,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-09-01 13:26:38,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-09-01 13:26:38,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:38,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-09-01 13:26:38,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:38,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:38,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:38,893 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 210 transitions. [2023-09-01 13:26:38,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-09-01 13:26:38,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 13:26:38,896 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-09-01 13:26:38,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-09-01 13:26:38,900 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-09-01 13:26:38,901 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-09-01 13:26:38,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:38,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:38,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:26:38,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:38,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1684820141, now seen corresponding path program 1 times [2023-09-01 13:26:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:38,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150166845] [2023-09-01 13:26:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:38,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:38,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150166845] [2023-09-01 13:26:38,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150166845] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:26:38,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:26:38,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:26:38,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313409767] [2023-09-01 13:26:38,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:26:38,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:26:38,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:26:38,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:26:38,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 126 [2023-09-01 13:26:39,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:39,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 126 [2023-09-01 13:26:39,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:39,088 INFO L130 PetriNetUnfolder]: 76/153 cut-off events. [2023-09-01 13:26:39,088 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-09-01 13:26:39,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 153 events. 76/153 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 473 event pairs, 24 based on Foata normal form. 2/155 useless extension candidates. Maximal degree in co-relation 183. Up to 78 conditions per place. [2023-09-01 13:26:39,090 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2023-09-01 13:26:39,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 191 flow [2023-09-01 13:26:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:26:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:26:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 312 transitions. [2023-09-01 13:26:39,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-09-01 13:26:39,093 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 312 transitions. [2023-09-01 13:26:39,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 312 transitions. [2023-09-01 13:26:39,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:39,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 312 transitions. [2023-09-01 13:26:39,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 62.4) internal successors, (312), 5 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,097 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,097 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 312 transitions. [2023-09-01 13:26:39,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 191 flow [2023-09-01 13:26:39,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:26:39,099 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 70 flow [2023-09-01 13:26:39,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-09-01 13:26:39,099 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-09-01 13:26:39,100 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 70 flow [2023-09-01 13:26:39,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:39,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:39,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:26:39,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:39,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash -298983667, now seen corresponding path program 2 times [2023-09-01 13:26:39,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:39,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909764032] [2023-09-01 13:26:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:39,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:39,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:39,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909764032] [2023-09-01 13:26:39,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909764032] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:39,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642109947] [2023-09-01 13:26:39,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:26:39,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:39,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:39,189 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:39,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:26:39,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:26:39,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:39,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 13:26:39,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:39,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:39,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642109947] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:39,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:39,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 13:26:39,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4493786] [2023-09-01 13:26:39,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:39,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 13:26:39,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:39,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 13:26:39,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 13:26:39,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:39,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 55.625) internal successors, (445), 8 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:39,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:39,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:39,529 INFO L130 PetriNetUnfolder]: 82/158 cut-off events. [2023-09-01 13:26:39,529 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2023-09-01 13:26:39,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 158 events. 82/158 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 492 event pairs, 14 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 143. Up to 90 conditions per place. [2023-09-01 13:26:39,531 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 29 selfloop transitions, 4 changer transitions 5/38 dead transitions. [2023-09-01 13:26:39,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 212 flow [2023-09-01 13:26:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:26:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:26:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 302 transitions. [2023-09-01 13:26:39,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793650793650794 [2023-09-01 13:26:39,533 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 302 transitions. [2023-09-01 13:26:39,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 302 transitions. [2023-09-01 13:26:39,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:39,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 302 transitions. [2023-09-01 13:26:39,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,537 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,537 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 70 flow. Second operand 5 states and 302 transitions. [2023-09-01 13:26:39,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 212 flow [2023-09-01 13:26:39,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 201 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 13:26:39,539 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 91 flow [2023-09-01 13:26:39,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-09-01 13:26:39,539 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-09-01 13:26:39,540 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 91 flow [2023-09-01 13:26:39,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 55.625) internal successors, (445), 8 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:39,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:39,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:39,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:39,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:39,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash 435057483, now seen corresponding path program 3 times [2023-09-01 13:26:39,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:39,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065492746] [2023-09-01 13:26:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:39,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:39,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:39,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065492746] [2023-09-01 13:26:39,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065492746] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:26:39,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:26:39,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:26:39,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091411640] [2023-09-01 13:26:39,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:26:39,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:26:39,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:39,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:26:39,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:26:39,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2023-09-01 13:26:39,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:39,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2023-09-01 13:26:39,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:39,974 INFO L130 PetriNetUnfolder]: 90/179 cut-off events. [2023-09-01 13:26:39,974 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2023-09-01 13:26:39,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 179 events. 90/179 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 565 event pairs, 30 based on Foata normal form. 2/181 useless extension candidates. Maximal degree in co-relation 327. Up to 84 conditions per place. [2023-09-01 13:26:39,976 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 25 selfloop transitions, 6 changer transitions 8/39 dead transitions. [2023-09-01 13:26:39,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 241 flow [2023-09-01 13:26:39,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:26:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:26:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 306 transitions. [2023-09-01 13:26:39,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-09-01 13:26:39,978 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 306 transitions. [2023-09-01 13:26:39,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 306 transitions. [2023-09-01 13:26:39,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:39,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 306 transitions. [2023-09-01 13:26:39,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.2) internal successors, (306), 5 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,980 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,981 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 91 flow. Second operand 5 states and 306 transitions. [2023-09-01 13:26:39,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 241 flow [2023-09-01 13:26:39,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 13:26:39,983 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 129 flow [2023-09-01 13:26:39,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-09-01 13:26:39,984 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2023-09-01 13:26:39,996 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 129 flow [2023-09-01 13:26:39,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:39,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:39,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:39,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:26:39,998 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:39,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:39,998 INFO L85 PathProgramCache]: Analyzing trace with hash -431708467, now seen corresponding path program 4 times [2023-09-01 13:26:39,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:39,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505154287] [2023-09-01 13:26:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:39,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:40,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:40,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505154287] [2023-09-01 13:26:40,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505154287] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:26:40,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:26:40,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:26:40,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079543742] [2023-09-01 13:26:40,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:26:40,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:26:40,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:40,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:26:40,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:26:40,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2023-09-01 13:26:40,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:40,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:40,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2023-09-01 13:26:40,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:40,173 INFO L130 PetriNetUnfolder]: 81/159 cut-off events. [2023-09-01 13:26:40,173 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-09-01 13:26:40,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 159 events. 81/159 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 479 event pairs, 34 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 242. Up to 116 conditions per place. [2023-09-01 13:26:40,178 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 22 selfloop transitions, 6 changer transitions 15/43 dead transitions. [2023-09-01 13:26:40,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 306 flow [2023-09-01 13:26:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:26:40,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:26:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 362 transitions. [2023-09-01 13:26:40,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2023-09-01 13:26:40,180 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 362 transitions. [2023-09-01 13:26:40,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 362 transitions. [2023-09-01 13:26:40,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:40,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 362 transitions. [2023-09-01 13:26:40,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.333333333333336) internal successors, (362), 6 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:40,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:40,185 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:40,185 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 129 flow. Second operand 6 states and 362 transitions. [2023-09-01 13:26:40,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 306 flow [2023-09-01 13:26:40,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 292 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 13:26:40,192 INFO L231 Difference]: Finished difference. Result has 38 places, 24 transitions, 164 flow [2023-09-01 13:26:40,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=38, PETRI_TRANSITIONS=24} [2023-09-01 13:26:40,194 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-09-01 13:26:40,194 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 24 transitions, 164 flow [2023-09-01 13:26:40,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:40,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:40,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:40,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 13:26:40,195 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:40,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:40,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1652494975, now seen corresponding path program 5 times [2023-09-01 13:26:40,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:40,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36336949] [2023-09-01 13:26:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:40,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:40,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:40,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36336949] [2023-09-01 13:26:40,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36336949] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:40,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620117620] [2023-09-01 13:26:40,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:26:40,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:40,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:40,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:40,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:26:40,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:26:40,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:40,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 13:26:40,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:40,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:40,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620117620] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:40,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:40,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 13:26:40,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579609015] [2023-09-01 13:26:40,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:40,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:26:40,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:40,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:26:40,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:26:40,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:40,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 24 transitions, 164 flow. Second operand has 10 states, 10 states have (on average 55.5) internal successors, (555), 10 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:40,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:40,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:40,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:40,612 INFO L130 PetriNetUnfolder]: 83/156 cut-off events. [2023-09-01 13:26:40,613 INFO L131 PetriNetUnfolder]: For 432/432 co-relation queries the response was YES. [2023-09-01 13:26:40,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 156 events. 83/156 cut-off events. For 432/432 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 429 event pairs, 14 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 468. Up to 100 conditions per place. [2023-09-01 13:26:40,614 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 37 selfloop transitions, 11 changer transitions 1/49 dead transitions. [2023-09-01 13:26:40,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 365 flow [2023-09-01 13:26:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:26:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:26:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2023-09-01 13:26:40,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662698412698413 [2023-09-01 13:26:40,618 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2023-09-01 13:26:40,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2023-09-01 13:26:40,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:40,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2023-09-01 13:26:40,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:40,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 126.0) internal successors, (1134), 9 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) [2023-09-01 13:26:40,621 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 126.0) internal successors, (1134), 9 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) [2023-09-01 13:26:40,621 INFO L175 Difference]: Start difference. First operand has 38 places, 24 transitions, 164 flow. Second operand 8 states and 470 transitions. [2023-09-01 13:26:40,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 365 flow [2023-09-01 13:26:40,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 49 transitions, 343 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 13:26:40,624 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 197 flow [2023-09-01 13:26:40,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2023-09-01 13:26:40,625 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2023-09-01 13:26:40,625 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 197 flow [2023-09-01 13:26:40,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 55.5) internal successors, (555), 10 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:40,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:40,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:40,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:40,830 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,SelfDestructingSolverStorable5 [2023-09-01 13:26:40,831 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:40,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:40,831 INFO L85 PathProgramCache]: Analyzing trace with hash -971592469, now seen corresponding path program 6 times [2023-09-01 13:26:40,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:40,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143870263] [2023-09-01 13:26:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:40,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:40,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:40,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143870263] [2023-09-01 13:26:40,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143870263] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:40,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13047853] [2023-09-01 13:26:40,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:26:40,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:40,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:40,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:40,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:26:40,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:26:40,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:40,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 13:26:40,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:40,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:41,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13047853] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:41,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:41,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 13:26:41,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459944431] [2023-09-01 13:26:41,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:41,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:26:41,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:41,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:26:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:26:41,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:41,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 55.3) internal successors, (553), 10 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:41,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:41,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:41,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:41,131 INFO L130 PetriNetUnfolder]: 75/140 cut-off events. [2023-09-01 13:26:41,132 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-09-01 13:26:41,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 140 events. 75/140 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 21 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 509. Up to 87 conditions per place. [2023-09-01 13:26:41,133 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 28 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2023-09-01 13:26:41,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 317 flow [2023-09-01 13:26:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:26:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:26:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 297 transitions. [2023-09-01 13:26:41,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2023-09-01 13:26:41,135 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 297 transitions. [2023-09-01 13:26:41,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 297 transitions. [2023-09-01 13:26:41,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:41,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 297 transitions. [2023-09-01 13:26:41,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:41,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:41,137 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:41,137 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 197 flow. Second operand 5 states and 297 transitions. [2023-09-01 13:26:41,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 317 flow [2023-09-01 13:26:41,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 293 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-09-01 13:26:41,140 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 177 flow [2023-09-01 13:26:41,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-09-01 13:26:41,141 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-09-01 13:26:41,141 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 177 flow [2023-09-01 13:26:41,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 55.3) internal successors, (553), 10 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:41,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:41,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:41,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:41,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:41,346 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:41,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:41,347 INFO L85 PathProgramCache]: Analyzing trace with hash -856446032, now seen corresponding path program 1 times [2023-09-01 13:26:41,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:41,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134451064] [2023-09-01 13:26:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:41,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:41,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:41,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134451064] [2023-09-01 13:26:41,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134451064] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:41,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111131001] [2023-09-01 13:26:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:41,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:41,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:41,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:41,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:26:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:41,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 13:26:41,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:41,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:41,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111131001] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:41,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:41,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-09-01 13:26:41,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067561904] [2023-09-01 13:26:41,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:41,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:26:41,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:26:41,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:26:41,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2023-09-01 13:26:41,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:41,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:41,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2023-09-01 13:26:41,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:41,652 INFO L130 PetriNetUnfolder]: 118/222 cut-off events. [2023-09-01 13:26:41,652 INFO L131 PetriNetUnfolder]: For 667/687 co-relation queries the response was YES. [2023-09-01 13:26:41,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 222 events. 118/222 cut-off events. For 667/687 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 763 event pairs, 12 based on Foata normal form. 19/235 useless extension candidates. Maximal degree in co-relation 759. Up to 111 conditions per place. [2023-09-01 13:26:41,654 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-09-01 13:26:41,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 380 flow [2023-09-01 13:26:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:26:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:26:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 283 transitions. [2023-09-01 13:26:41,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615079365079365 [2023-09-01 13:26:41,655 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 283 transitions. [2023-09-01 13:26:41,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 283 transitions. [2023-09-01 13:26:41,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:41,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 283 transitions. [2023-09-01 13:26:41,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:41,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:41,658 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:41,659 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 177 flow. Second operand 4 states and 283 transitions. [2023-09-01 13:26:41,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 380 flow [2023-09-01 13:26:41,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 323 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-09-01 13:26:41,661 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 238 flow [2023-09-01 13:26:41,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-09-01 13:26:41,663 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-09-01 13:26:41,663 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 238 flow [2023-09-01 13:26:41,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:41,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:41,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:41,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 13:26:41,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:41,868 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:41,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:41,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1694599747, now seen corresponding path program 2 times [2023-09-01 13:26:41,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:41,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024559119] [2023-09-01 13:26:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:41,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:41,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:41,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024559119] [2023-09-01 13:26:41,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024559119] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:41,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915721978] [2023-09-01 13:26:41,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:26:41,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:41,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:41,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:41,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 13:26:42,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:26:42,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:42,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:26:42,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:42,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:42,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915721978] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:42,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:42,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 13:26:42,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963287182] [2023-09-01 13:26:42,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:42,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:26:42,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:42,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:26:42,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:26:42,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:42,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 238 flow. Second operand has 12 states, 12 states have (on average 55.25) internal successors, (663), 12 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:42,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:42,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:42,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:42,454 INFO L130 PetriNetUnfolder]: 236/464 cut-off events. [2023-09-01 13:26:42,454 INFO L131 PetriNetUnfolder]: For 977/977 co-relation queries the response was YES. [2023-09-01 13:26:42,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 464 events. 236/464 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2004 event pairs, 3 based on Foata normal form. 16/480 useless extension candidates. Maximal degree in co-relation 666. Up to 157 conditions per place. [2023-09-01 13:26:42,457 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 83 selfloop transitions, 44 changer transitions 6/133 dead transitions. [2023-09-01 13:26:42,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 133 transitions, 1027 flow [2023-09-01 13:26:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 13:26:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 13:26:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1170 transitions. [2023-09-01 13:26:42,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-09-01 13:26:42,461 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1170 transitions. [2023-09-01 13:26:42,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1170 transitions. [2023-09-01 13:26:42,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:42,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1170 transitions. [2023-09-01 13:26:42,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 58.5) internal successors, (1170), 20 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:42,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:42,468 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:42,468 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 238 flow. Second operand 20 states and 1170 transitions. [2023-09-01 13:26:42,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 133 transitions, 1027 flow [2023-09-01 13:26:42,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 133 transitions, 993 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-09-01 13:26:42,473 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 673 flow [2023-09-01 13:26:42,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=673, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2023-09-01 13:26:42,474 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 44 predicate places. [2023-09-01 13:26:42,474 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 673 flow [2023-09-01 13:26:42,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 55.25) internal successors, (663), 12 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:42,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:42,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:42,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:42,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:42,680 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:42,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1093790239, now seen corresponding path program 3 times [2023-09-01 13:26:42,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:42,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091552075] [2023-09-01 13:26:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:42,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:42,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091552075] [2023-09-01 13:26:42,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091552075] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:42,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142022729] [2023-09-01 13:26:42,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:26:42,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:42,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:42,746 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:42,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:26:42,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:26:42,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:42,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:26:42,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:42,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:42,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142022729] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:42,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:42,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 13:26:42,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817286690] [2023-09-01 13:26:42,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:42,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:26:42,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:26:42,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:26:42,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:42,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 673 flow. Second operand has 11 states, 11 states have (on average 55.09090909090909) internal successors, (606), 11 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:42,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:42,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:42,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:43,126 INFO L130 PetriNetUnfolder]: 246/505 cut-off events. [2023-09-01 13:26:43,127 INFO L131 PetriNetUnfolder]: For 1897/1897 co-relation queries the response was YES. [2023-09-01 13:26:43,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 505 events. 246/505 cut-off events. For 1897/1897 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2349 event pairs, 21 based on Foata normal form. 12/517 useless extension candidates. Maximal degree in co-relation 2005. Up to 346 conditions per place. [2023-09-01 13:26:43,131 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 84 selfloop transitions, 19 changer transitions 12/115 dead transitions. [2023-09-01 13:26:43,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 115 transitions, 1208 flow [2023-09-01 13:26:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:26:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:26:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 419 transitions. [2023-09-01 13:26:43,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47505668934240364 [2023-09-01 13:26:43,133 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 419 transitions. [2023-09-01 13:26:43,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 419 transitions. [2023-09-01 13:26:43,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:43,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 419 transitions. [2023-09-01 13:26:43,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:43,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:43,137 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:43,137 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 673 flow. Second operand 7 states and 419 transitions. [2023-09-01 13:26:43,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 115 transitions, 1208 flow [2023-09-01 13:26:43,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 115 transitions, 953 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-09-01 13:26:43,151 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 661 flow [2023-09-01 13:26:43,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=661, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2023-09-01 13:26:43,153 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 48 predicate places. [2023-09-01 13:26:43,153 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 661 flow [2023-09-01 13:26:43,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 55.09090909090909) internal successors, (606), 11 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:43,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:43,153 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:43,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:43,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:43,358 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:43,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash 875450143, now seen corresponding path program 4 times [2023-09-01 13:26:43,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:43,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723582350] [2023-09-01 13:26:43,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:43,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:43,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:43,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723582350] [2023-09-01 13:26:43,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723582350] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:43,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659498979] [2023-09-01 13:26:43,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:26:43,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:43,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:43,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:43,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:26:43,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:26:43,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:43,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:26:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:43,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:43,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659498979] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:43,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:43,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 13:26:43,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465883938] [2023-09-01 13:26:43,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:43,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:26:43,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:43,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:26:43,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:26:43,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:43,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 661 flow. Second operand has 12 states, 12 states have (on average 55.25) internal successors, (663), 12 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:43,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:43,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:43,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:43,891 INFO L130 PetriNetUnfolder]: 232/475 cut-off events. [2023-09-01 13:26:43,891 INFO L131 PetriNetUnfolder]: For 1632/1632 co-relation queries the response was YES. [2023-09-01 13:26:43,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 475 events. 232/475 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2259 event pairs, 11 based on Foata normal form. 34/509 useless extension candidates. Maximal degree in co-relation 1710. Up to 204 conditions per place. [2023-09-01 13:26:43,895 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 76 selfloop transitions, 46 changer transitions 7/129 dead transitions. [2023-09-01 13:26:43,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1160 flow [2023-09-01 13:26:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 13:26:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 13:26:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 830 transitions. [2023-09-01 13:26:43,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47052154195011336 [2023-09-01 13:26:43,897 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 830 transitions. [2023-09-01 13:26:43,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 830 transitions. [2023-09-01 13:26:43,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:43,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 830 transitions. [2023-09-01 13:26:43,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 59.285714285714285) internal successors, (830), 14 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:43,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:43,903 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:43,903 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 661 flow. Second operand 14 states and 830 transitions. [2023-09-01 13:26:43,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1160 flow [2023-09-01 13:26:43,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 129 transitions, 1079 flow, removed 35 selfloop flow, removed 5 redundant places. [2023-09-01 13:26:43,912 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 756 flow [2023-09-01 13:26:43,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=756, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-09-01 13:26:43,913 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-09-01 13:26:43,913 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 756 flow [2023-09-01 13:26:43,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 55.25) internal successors, (663), 12 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:43,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:43,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:43,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:44,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:44,121 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:44,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:44,121 INFO L85 PathProgramCache]: Analyzing trace with hash -862014729, now seen corresponding path program 5 times [2023-09-01 13:26:44,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:44,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325041337] [2023-09-01 13:26:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:44,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:44,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:44,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325041337] [2023-09-01 13:26:44,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325041337] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:44,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033070038] [2023-09-01 13:26:44,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:26:44,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:44,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:44,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:44,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:26:44,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:26:44,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:44,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:26:44,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:44,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:44,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033070038] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:44,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:44,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 13:26:44,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704715520] [2023-09-01 13:26:44,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:44,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:26:44,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:44,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:26:44,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:26:44,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:44,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 756 flow. Second operand has 15 states, 15 states have (on average 54.8) internal successors, (822), 15 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:44,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:44,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:44,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:44,678 INFO L130 PetriNetUnfolder]: 294/606 cut-off events. [2023-09-01 13:26:44,679 INFO L131 PetriNetUnfolder]: For 2190/2190 co-relation queries the response was YES. [2023-09-01 13:26:44,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 606 events. 294/606 cut-off events. For 2190/2190 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2988 event pairs, 63 based on Foata normal form. 42/648 useless extension candidates. Maximal degree in co-relation 2237. Up to 320 conditions per place. [2023-09-01 13:26:44,683 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 105 selfloop transitions, 47 changer transitions 3/155 dead transitions. [2023-09-01 13:26:44,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 155 transitions, 1536 flow [2023-09-01 13:26:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:26:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:26:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 780 transitions. [2023-09-01 13:26:44,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-09-01 13:26:44,686 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 780 transitions. [2023-09-01 13:26:44,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 780 transitions. [2023-09-01 13:26:44,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:44,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 780 transitions. [2023-09-01 13:26:44,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 60.0) internal successors, (780), 13 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:44,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:44,691 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:44,691 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 756 flow. Second operand 13 states and 780 transitions. [2023-09-01 13:26:44,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 155 transitions, 1536 flow [2023-09-01 13:26:44,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 155 transitions, 1481 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-09-01 13:26:44,702 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 1164 flow [2023-09-01 13:26:44,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1164, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2023-09-01 13:26:44,703 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2023-09-01 13:26:44,703 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 1164 flow [2023-09-01 13:26:44,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.8) internal successors, (822), 15 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:44,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:44,704 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:44,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 13:26:44,909 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,SelfDestructingSolverStorable11 [2023-09-01 13:26:44,909 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:44,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1875695203, now seen corresponding path program 6 times [2023-09-01 13:26:44,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:44,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249443795] [2023-09-01 13:26:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:44,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:45,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:45,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249443795] [2023-09-01 13:26:45,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249443795] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:45,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011683114] [2023-09-01 13:26:45,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:26:45,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:45,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:45,005 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:45,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:26:45,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:26:45,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:45,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:26:45,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:45,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:45,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011683114] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:45,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:45,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 13:26:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27935739] [2023-09-01 13:26:45,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:45,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 13:26:45,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:45,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 13:26:45,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-09-01 13:26:45,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:45,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 1164 flow. Second operand has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:45,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:45,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:45,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:45,510 INFO L130 PetriNetUnfolder]: 309/631 cut-off events. [2023-09-01 13:26:45,511 INFO L131 PetriNetUnfolder]: For 4210/4210 co-relation queries the response was YES. [2023-09-01 13:26:45,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3312 conditions, 631 events. 309/631 cut-off events. For 4210/4210 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3138 event pairs, 32 based on Foata normal form. 6/637 useless extension candidates. Maximal degree in co-relation 2877. Up to 177 conditions per place. [2023-09-01 13:26:45,516 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 85 selfloop transitions, 69 changer transitions 8/162 dead transitions. [2023-09-01 13:26:45,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 162 transitions, 1906 flow [2023-09-01 13:26:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 13:26:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 13:26:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 987 transitions. [2023-09-01 13:26:45,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2023-09-01 13:26:45,519 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 987 transitions. [2023-09-01 13:26:45,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 987 transitions. [2023-09-01 13:26:45,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:45,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 987 transitions. [2023-09-01 13:26:45,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 58.05882352941177) internal successors, (987), 17 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:45,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:45,525 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:45,526 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 1164 flow. Second operand 17 states and 987 transitions. [2023-09-01 13:26:45,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 162 transitions, 1906 flow [2023-09-01 13:26:45,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 162 transitions, 1674 flow, removed 105 selfloop flow, removed 3 redundant places. [2023-09-01 13:26:45,541 INFO L231 Difference]: Finished difference. Result has 108 places, 117 transitions, 1294 flow [2023-09-01 13:26:45,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1294, PETRI_PLACES=108, PETRI_TRANSITIONS=117} [2023-09-01 13:26:45,542 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-09-01 13:26:45,542 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 117 transitions, 1294 flow [2023-09-01 13:26:45,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:45,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:45,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:45,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:45,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 13:26:45,749 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:45,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:45,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1755297934, now seen corresponding path program 7 times [2023-09-01 13:26:45,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:45,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601096891] [2023-09-01 13:26:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:45,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:45,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:45,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601096891] [2023-09-01 13:26:45,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601096891] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:45,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749262932] [2023-09-01 13:26:45,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:26:45,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:45,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:45,832 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:45,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:26:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:45,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 13:26:45,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:45,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:45,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749262932] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:45,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:45,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-09-01 13:26:45,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332085641] [2023-09-01 13:26:45,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:45,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:26:45,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:45,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:26:45,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:26:45,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2023-09-01 13:26:45,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 117 transitions, 1294 flow. Second operand has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:45,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:45,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2023-09-01 13:26:45,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:46,162 INFO L130 PetriNetUnfolder]: 525/1068 cut-off events. [2023-09-01 13:26:46,162 INFO L131 PetriNetUnfolder]: For 6835/6846 co-relation queries the response was YES. [2023-09-01 13:26:46,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5774 conditions, 1068 events. 525/1068 cut-off events. For 6835/6846 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6186 event pairs, 57 based on Foata normal form. 30/1096 useless extension candidates. Maximal degree in co-relation 5470. Up to 464 conditions per place. [2023-09-01 13:26:46,172 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 124 selfloop transitions, 58 changer transitions 47/236 dead transitions. [2023-09-01 13:26:46,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 236 transitions, 2948 flow [2023-09-01 13:26:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:26:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:26:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 356 transitions. [2023-09-01 13:26:46,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650793650793651 [2023-09-01 13:26:46,173 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 356 transitions. [2023-09-01 13:26:46,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 356 transitions. [2023-09-01 13:26:46,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:46,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 356 transitions. [2023-09-01 13:26:46,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:46,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:46,176 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:46,177 INFO L175 Difference]: Start difference. First operand has 108 places, 117 transitions, 1294 flow. Second operand 5 states and 356 transitions. [2023-09-01 13:26:46,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 236 transitions, 2948 flow [2023-09-01 13:26:46,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 236 transitions, 2774 flow, removed 68 selfloop flow, removed 3 redundant places. [2023-09-01 13:26:46,204 INFO L231 Difference]: Finished difference. Result has 111 places, 154 transitions, 1950 flow [2023-09-01 13:26:46,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1950, PETRI_PLACES=111, PETRI_TRANSITIONS=154} [2023-09-01 13:26:46,205 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2023-09-01 13:26:46,205 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 154 transitions, 1950 flow [2023-09-01 13:26:46,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:46,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:46,206 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:46,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:46,410 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,SelfDestructingSolverStorable13 [2023-09-01 13:26:46,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:46,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:46,411 INFO L85 PathProgramCache]: Analyzing trace with hash 717592001, now seen corresponding path program 8 times [2023-09-01 13:26:46,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:46,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963150551] [2023-09-01 13:26:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:46,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:46,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:46,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963150551] [2023-09-01 13:26:46,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963150551] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:46,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303313983] [2023-09-01 13:26:46,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:26:46,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:46,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:46,494 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:46,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:26:46,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:26:46,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:46,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:26:46,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:46,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:46,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303313983] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:46,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:46,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 13:26:46,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445248760] [2023-09-01 13:26:46,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:46,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:26:46,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:46,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:26:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:26:46,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:46,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 154 transitions, 1950 flow. Second operand has 15 states, 15 states have (on average 54.86666666666667) internal successors, (823), 15 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:46,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:46,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:46,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:47,472 INFO L130 PetriNetUnfolder]: 680/1466 cut-off events. [2023-09-01 13:26:47,472 INFO L131 PetriNetUnfolder]: For 12423/12423 co-relation queries the response was YES. [2023-09-01 13:26:47,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8575 conditions, 1466 events. 680/1466 cut-off events. For 12423/12423 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9563 event pairs, 15 based on Foata normal form. 24/1490 useless extension candidates. Maximal degree in co-relation 8303. Up to 331 conditions per place. [2023-09-01 13:26:47,486 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 152 selfloop transitions, 156 changer transitions 21/329 dead transitions. [2023-09-01 13:26:47,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 329 transitions, 4265 flow [2023-09-01 13:26:47,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 13:26:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 13:26:47,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1923 transitions. [2023-09-01 13:26:47,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624819624819625 [2023-09-01 13:26:47,492 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1923 transitions. [2023-09-01 13:26:47,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1923 transitions. [2023-09-01 13:26:47,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:47,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1923 transitions. [2023-09-01 13:26:47,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.27272727272727) internal successors, (1923), 33 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:47,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 126.0) internal successors, (4284), 34 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:47,506 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 126.0) internal successors, (4284), 34 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:47,506 INFO L175 Difference]: Start difference. First operand has 111 places, 154 transitions, 1950 flow. Second operand 33 states and 1923 transitions. [2023-09-01 13:26:47,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 329 transitions, 4265 flow [2023-09-01 13:26:47,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 329 transitions, 4097 flow, removed 62 selfloop flow, removed 1 redundant places. [2023-09-01 13:26:47,554 INFO L231 Difference]: Finished difference. Result has 155 places, 224 transitions, 3489 flow [2023-09-01 13:26:47,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3489, PETRI_PLACES=155, PETRI_TRANSITIONS=224} [2023-09-01 13:26:47,554 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-09-01 13:26:47,555 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 224 transitions, 3489 flow [2023-09-01 13:26:47,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.86666666666667) internal successors, (823), 15 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:47,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:47,555 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:47,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:47,762 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,SelfDestructingSolverStorable14 [2023-09-01 13:26:47,762 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:47,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash 694726189, now seen corresponding path program 9 times [2023-09-01 13:26:47,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:47,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501997656] [2023-09-01 13:26:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:47,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:47,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501997656] [2023-09-01 13:26:47,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501997656] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384672905] [2023-09-01 13:26:47,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:26:47,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:47,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:47,841 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) [2023-09-01 13:26:47,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:26:47,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:26:47,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:47,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:26:47,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:47,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:48,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384672905] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:48,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:48,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-09-01 13:26:48,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786435984] [2023-09-01 13:26:48,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:48,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:26:48,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:26:48,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:26:48,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:48,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 224 transitions, 3489 flow. Second operand has 14 states, 14 states have (on average 54.857142857142854) internal successors, (768), 14 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:48,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:48,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:48,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:48,524 INFO L130 PetriNetUnfolder]: 767/1617 cut-off events. [2023-09-01 13:26:48,524 INFO L131 PetriNetUnfolder]: For 23775/23775 co-relation queries the response was YES. [2023-09-01 13:26:48,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11155 conditions, 1617 events. 767/1617 cut-off events. For 23775/23775 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10612 event pairs, 95 based on Foata normal form. 36/1653 useless extension candidates. Maximal degree in co-relation 10864. Up to 1257 conditions per place. [2023-09-01 13:26:48,541 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 239 selfloop transitions, 50 changer transitions 24/313 dead transitions. [2023-09-01 13:26:48,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 313 transitions, 5327 flow [2023-09-01 13:26:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:26:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:26:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 537 transitions. [2023-09-01 13:26:48,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2023-09-01 13:26:48,543 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 537 transitions. [2023-09-01 13:26:48,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 537 transitions. [2023-09-01 13:26:48,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:48,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 537 transitions. [2023-09-01 13:26:48,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 59.666666666666664) internal successors, (537), 9 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:48,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 126.0) internal successors, (1260), 10 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:48,546 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 126.0) internal successors, (1260), 10 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:48,546 INFO L175 Difference]: Start difference. First operand has 155 places, 224 transitions, 3489 flow. Second operand 9 states and 537 transitions. [2023-09-01 13:26:48,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 313 transitions, 5327 flow [2023-09-01 13:26:48,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 313 transitions, 4341 flow, removed 418 selfloop flow, removed 12 redundant places. [2023-09-01 13:26:48,669 INFO L231 Difference]: Finished difference. Result has 153 places, 252 transitions, 3402 flow [2023-09-01 13:26:48,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3402, PETRI_PLACES=153, PETRI_TRANSITIONS=252} [2023-09-01 13:26:48,670 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-09-01 13:26:48,671 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 252 transitions, 3402 flow [2023-09-01 13:26:48,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.857142857142854) internal successors, (768), 14 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:48,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:48,671 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:48,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:48,877 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,SelfDestructingSolverStorable15 [2023-09-01 13:26:48,877 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:48,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:48,877 INFO L85 PathProgramCache]: Analyzing trace with hash -462692187, now seen corresponding path program 10 times [2023-09-01 13:26:48,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:48,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930994464] [2023-09-01 13:26:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:48,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:48,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:48,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930994464] [2023-09-01 13:26:48,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930994464] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:48,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566316797] [2023-09-01 13:26:48,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:26:48,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:48,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:48,961 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) [2023-09-01 13:26:48,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:26:49,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:26:49,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:49,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:26:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:49,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:49,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566316797] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:49,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:49,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 13:26:49,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978021658] [2023-09-01 13:26:49,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:49,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:26:49,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:26:49,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:26:49,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:49,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 252 transitions, 3402 flow. Second operand has 16 states, 16 states have (on average 54.9375) internal successors, (879), 16 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:49,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:49,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:49,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:49,830 INFO L130 PetriNetUnfolder]: 934/1910 cut-off events. [2023-09-01 13:26:49,830 INFO L131 PetriNetUnfolder]: For 27065/27065 co-relation queries the response was YES. [2023-09-01 13:26:49,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12391 conditions, 1910 events. 934/1910 cut-off events. For 27065/27065 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12701 event pairs, 81 based on Foata normal form. 78/1988 useless extension candidates. Maximal degree in co-relation 12100. Up to 1501 conditions per place. [2023-09-01 13:26:49,856 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 271 selfloop transitions, 90 changer transitions 3/364 dead transitions. [2023-09-01 13:26:49,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 364 transitions, 5451 flow [2023-09-01 13:26:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 13:26:49,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 13:26:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 828 transitions. [2023-09-01 13:26:49,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2023-09-01 13:26:49,858 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 828 transitions. [2023-09-01 13:26:49,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 828 transitions. [2023-09-01 13:26:49,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:49,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 828 transitions. [2023-09-01 13:26:49,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 59.142857142857146) internal successors, (828), 14 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:49,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:49,863 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:49,863 INFO L175 Difference]: Start difference. First operand has 153 places, 252 transitions, 3402 flow. Second operand 14 states and 828 transitions. [2023-09-01 13:26:49,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 364 transitions, 5451 flow [2023-09-01 13:26:49,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 364 transitions, 5377 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-09-01 13:26:49,957 INFO L231 Difference]: Finished difference. Result has 167 places, 300 transitions, 4482 flow [2023-09-01 13:26:49,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4482, PETRI_PLACES=167, PETRI_TRANSITIONS=300} [2023-09-01 13:26:49,958 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 147 predicate places. [2023-09-01 13:26:49,958 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 300 transitions, 4482 flow [2023-09-01 13:26:49,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.9375) internal successors, (879), 16 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:49,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:49,958 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:49,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-09-01 13:26:50,158 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,SelfDestructingSolverStorable16 [2023-09-01 13:26:50,159 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:50,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:50,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2059593163, now seen corresponding path program 11 times [2023-09-01 13:26:50,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:50,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631737570] [2023-09-01 13:26:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:50,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:50,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:50,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631737570] [2023-09-01 13:26:50,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631737570] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:50,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695271813] [2023-09-01 13:26:50,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:26:50,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:50,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:50,257 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) [2023-09-01 13:26:50,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 13:26:50,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 13:26:50,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:50,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:26:50,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:50,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:50,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695271813] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:50,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:50,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 13:26:50,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892115782] [2023-09-01 13:26:50,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:50,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:26:50,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:50,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:26:50,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:26:50,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:50,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 300 transitions, 4482 flow. Second operand has 15 states, 15 states have (on average 54.8) internal successors, (822), 15 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:50,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:50,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:50,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:51,247 INFO L130 PetriNetUnfolder]: 898/1821 cut-off events. [2023-09-01 13:26:51,248 INFO L131 PetriNetUnfolder]: For 29203/29203 co-relation queries the response was YES. [2023-09-01 13:26:51,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12625 conditions, 1821 events. 898/1821 cut-off events. For 29203/29203 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11848 event pairs, 45 based on Foata normal form. 62/1883 useless extension candidates. Maximal degree in co-relation 12330. Up to 592 conditions per place. [2023-09-01 13:26:51,262 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 178 selfloop transitions, 189 changer transitions 1/368 dead transitions. [2023-09-01 13:26:51,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 368 transitions, 5690 flow [2023-09-01 13:26:51,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 13:26:51,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 13:26:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1294 transitions. [2023-09-01 13:26:51,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668109668109668 [2023-09-01 13:26:51,265 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1294 transitions. [2023-09-01 13:26:51,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1294 transitions. [2023-09-01 13:26:51,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:51,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1294 transitions. [2023-09-01 13:26:51,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.81818181818182) internal successors, (1294), 22 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:51,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 126.0) internal successors, (2898), 23 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:51,271 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 126.0) internal successors, (2898), 23 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:51,271 INFO L175 Difference]: Start difference. First operand has 167 places, 300 transitions, 4482 flow. Second operand 22 states and 1294 transitions. [2023-09-01 13:26:51,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 368 transitions, 5690 flow [2023-09-01 13:26:51,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 368 transitions, 5453 flow, removed 100 selfloop flow, removed 7 redundant places. [2023-09-01 13:26:51,394 INFO L231 Difference]: Finished difference. Result has 182 places, 297 transitions, 4752 flow [2023-09-01 13:26:51,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=4150, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4752, PETRI_PLACES=182, PETRI_TRANSITIONS=297} [2023-09-01 13:26:51,395 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 162 predicate places. [2023-09-01 13:26:51,395 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 297 transitions, 4752 flow [2023-09-01 13:26:51,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.8) internal successors, (822), 15 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:51,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:51,396 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:51,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:51,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:51,601 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:51,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:51,601 INFO L85 PathProgramCache]: Analyzing trace with hash 306499919, now seen corresponding path program 12 times [2023-09-01 13:26:51,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:51,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133068316] [2023-09-01 13:26:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:51,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:51,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:51,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133068316] [2023-09-01 13:26:51,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133068316] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:51,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731088056] [2023-09-01 13:26:51,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:26:51,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:51,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:51,676 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) [2023-09-01 13:26:51,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:26:51,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:26:51,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:51,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:26:51,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:51,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:51,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731088056] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:51,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:51,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-09-01 13:26:51,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983339245] [2023-09-01 13:26:51,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:51,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:26:51,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:51,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:26:51,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:26:51,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:51,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 297 transitions, 4752 flow. Second operand has 15 states, 15 states have (on average 55.06666666666667) internal successors, (826), 15 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:51,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:51,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:51,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:52,699 INFO L130 PetriNetUnfolder]: 1322/2652 cut-off events. [2023-09-01 13:26:52,699 INFO L131 PetriNetUnfolder]: For 42197/42197 co-relation queries the response was YES. [2023-09-01 13:26:52,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19147 conditions, 2652 events. 1322/2652 cut-off events. For 42197/42197 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18444 event pairs, 73 based on Foata normal form. 74/2726 useless extension candidates. Maximal degree in co-relation 18852. Up to 1100 conditions per place. [2023-09-01 13:26:52,726 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 245 selfloop transitions, 274 changer transitions 8/527 dead transitions. [2023-09-01 13:26:52,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 527 transitions, 9054 flow [2023-09-01 13:26:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 13:26:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 13:26:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1239 transitions. [2023-09-01 13:26:52,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2023-09-01 13:26:52,730 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1239 transitions. [2023-09-01 13:26:52,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1239 transitions. [2023-09-01 13:26:52,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:52,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1239 transitions. [2023-09-01 13:26:52,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 59.0) internal successors, (1239), 21 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:52,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:52,737 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:52,737 INFO L175 Difference]: Start difference. First operand has 182 places, 297 transitions, 4752 flow. Second operand 21 states and 1239 transitions. [2023-09-01 13:26:52,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 527 transitions, 9054 flow [2023-09-01 13:26:52,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 527 transitions, 8656 flow, removed 67 selfloop flow, removed 16 redundant places. [2023-09-01 13:26:52,992 INFO L231 Difference]: Finished difference. Result has 194 places, 431 transitions, 7829 flow [2023-09-01 13:26:52,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=4519, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7829, PETRI_PLACES=194, PETRI_TRANSITIONS=431} [2023-09-01 13:26:52,992 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-09-01 13:26:52,992 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 431 transitions, 7829 flow [2023-09-01 13:26:52,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.06666666666667) internal successors, (826), 15 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:52,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:52,993 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:52,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:53,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:53,194 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:53,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:53,194 INFO L85 PathProgramCache]: Analyzing trace with hash 824419987, now seen corresponding path program 13 times [2023-09-01 13:26:53,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:53,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191025967] [2023-09-01 13:26:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:53,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:53,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:53,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191025967] [2023-09-01 13:26:53,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191025967] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:53,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269974721] [2023-09-01 13:26:53,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:26:53,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:53,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:53,289 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) [2023-09-01 13:26:53,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:26:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:53,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:26:53,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:53,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:53,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269974721] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:53,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:53,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-09-01 13:26:53,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118484936] [2023-09-01 13:26:53,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:53,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:26:53,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:53,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:26:53,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:26:53,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:53,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 431 transitions, 7829 flow. Second operand has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:53,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:53,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:53,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:54,359 INFO L130 PetriNetUnfolder]: 1429/2857 cut-off events. [2023-09-01 13:26:54,360 INFO L131 PetriNetUnfolder]: For 62333/62333 co-relation queries the response was YES. [2023-09-01 13:26:54,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22775 conditions, 2857 events. 1429/2857 cut-off events. For 62333/62333 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 19981 event pairs, 422 based on Foata normal form. 104/2961 useless extension candidates. Maximal degree in co-relation 22294. Up to 2077 conditions per place. [2023-09-01 13:26:54,424 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 424 selfloop transitions, 133 changer transitions 14/571 dead transitions. [2023-09-01 13:26:54,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 571 transitions, 10771 flow [2023-09-01 13:26:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 13:26:54,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 13:26:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1254 transitions. [2023-09-01 13:26:54,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47392290249433106 [2023-09-01 13:26:54,436 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1254 transitions. [2023-09-01 13:26:54,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1254 transitions. [2023-09-01 13:26:54,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:54,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1254 transitions. [2023-09-01 13:26:54,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:54,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:54,442 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:54,442 INFO L175 Difference]: Start difference. First operand has 194 places, 431 transitions, 7829 flow. Second operand 21 states and 1254 transitions. [2023-09-01 13:26:54,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 571 transitions, 10771 flow [2023-09-01 13:26:54,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 571 transitions, 10358 flow, removed 180 selfloop flow, removed 8 redundant places. [2023-09-01 13:26:54,770 INFO L231 Difference]: Finished difference. Result has 216 places, 482 transitions, 9144 flow [2023-09-01 13:26:54,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=7416, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9144, PETRI_PLACES=216, PETRI_TRANSITIONS=482} [2023-09-01 13:26:54,771 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 196 predicate places. [2023-09-01 13:26:54,771 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 482 transitions, 9144 flow [2023-09-01 13:26:54,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:54,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:54,771 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:54,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-09-01 13:26:54,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:54,972 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:54,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:54,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1134645313, now seen corresponding path program 14 times [2023-09-01 13:26:54,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:54,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061113930] [2023-09-01 13:26:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:54,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:55,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:55,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061113930] [2023-09-01 13:26:55,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061113930] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:55,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096784371] [2023-09-01 13:26:55,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:26:55,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:55,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:55,061 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) [2023-09-01 13:26:55,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 13:26:55,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:26:55,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:26:55,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:55,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:55,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096784371] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:55,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:55,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-09-01 13:26:55,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195229584] [2023-09-01 13:26:55,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:55,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:26:55,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:26:55,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:26:55,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:55,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 482 transitions, 9144 flow. Second operand has 17 states, 17 states have (on average 54.76470588235294) internal successors, (931), 17 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:55,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:55,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:55,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:56,278 INFO L130 PetriNetUnfolder]: 1464/2908 cut-off events. [2023-09-01 13:26:56,278 INFO L131 PetriNetUnfolder]: For 69173/69173 co-relation queries the response was YES. [2023-09-01 13:26:56,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23923 conditions, 2908 events. 1464/2908 cut-off events. For 69173/69173 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20342 event pairs, 155 based on Foata normal form. 6/2914 useless extension candidates. Maximal degree in co-relation 23182. Up to 922 conditions per place. [2023-09-01 13:26:56,307 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 298 selfloop transitions, 271 changer transitions 11/580 dead transitions. [2023-09-01 13:26:56,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 580 transitions, 11436 flow [2023-09-01 13:26:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 13:26:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 13:26:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1499 transitions. [2023-09-01 13:26:56,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45757020757020755 [2023-09-01 13:26:56,317 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1499 transitions. [2023-09-01 13:26:56,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1499 transitions. [2023-09-01 13:26:56,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:56,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1499 transitions. [2023-09-01 13:26:56,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.65384615384615) internal successors, (1499), 26 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:56,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 126.0) internal successors, (3402), 27 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:56,330 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 126.0) internal successors, (3402), 27 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:56,330 INFO L175 Difference]: Start difference. First operand has 216 places, 482 transitions, 9144 flow. Second operand 26 states and 1499 transitions. [2023-09-01 13:26:56,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 580 transitions, 11436 flow [2023-09-01 13:26:56,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 580 transitions, 10269 flow, removed 579 selfloop flow, removed 3 redundant places. [2023-09-01 13:26:56,844 INFO L231 Difference]: Finished difference. Result has 242 places, 515 transitions, 9316 flow [2023-09-01 13:26:56,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=8199, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9316, PETRI_PLACES=242, PETRI_TRANSITIONS=515} [2023-09-01 13:26:56,845 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-09-01 13:26:56,845 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 515 transitions, 9316 flow [2023-09-01 13:26:56,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.76470588235294) internal successors, (931), 17 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:56,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:56,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:56,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:57,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:57,046 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:57,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:57,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1355573420, now seen corresponding path program 15 times [2023-09-01 13:26:57,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:57,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318815575] [2023-09-01 13:26:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:57,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:57,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:57,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318815575] [2023-09-01 13:26:57,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318815575] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:57,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699001395] [2023-09-01 13:26:57,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:26:57,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:57,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:57,150 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) [2023-09-01 13:26:57,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 13:26:57,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:26:57,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:57,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 13:26:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:57,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:57,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699001395] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:57,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:57,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-09-01 13:26:57,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956814400] [2023-09-01 13:26:57,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:57,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 13:26:57,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 13:26:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-09-01 13:26:57,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2023-09-01 13:26:57,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 515 transitions, 9316 flow. Second operand has 6 states, 6 states have (on average 64.83333333333333) internal successors, (389), 6 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:57,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:57,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2023-09-01 13:26:57,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:58,256 INFO L130 PetriNetUnfolder]: 2182/4290 cut-off events. [2023-09-01 13:26:58,256 INFO L131 PetriNetUnfolder]: For 92299/92309 co-relation queries the response was YES. [2023-09-01 13:26:58,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34579 conditions, 4290 events. 2182/4290 cut-off events. For 92299/92309 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 32229 event pairs, 185 based on Foata normal form. 35/4323 useless extension candidates. Maximal degree in co-relation 33385. Up to 2162 conditions per place. [2023-09-01 13:26:58,299 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 469 selfloop transitions, 286 changer transitions 101/864 dead transitions. [2023-09-01 13:26:58,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 864 transitions, 16916 flow [2023-09-01 13:26:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:26:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:26:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2023-09-01 13:26:58,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2023-09-01 13:26:58,302 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2023-09-01 13:26:58,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2023-09-01 13:26:58,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:58,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2023-09-01 13:26:58,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:58,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:58,305 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:58,305 INFO L175 Difference]: Start difference. First operand has 242 places, 515 transitions, 9316 flow. Second operand 6 states and 429 transitions. [2023-09-01 13:26:58,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 864 transitions, 16916 flow [2023-09-01 13:26:59,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 864 transitions, 16372 flow, removed 222 selfloop flow, removed 8 redundant places. [2023-09-01 13:26:59,032 INFO L231 Difference]: Finished difference. Result has 242 places, 684 transitions, 13471 flow [2023-09-01 13:26:59,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=9037, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13471, PETRI_PLACES=242, PETRI_TRANSITIONS=684} [2023-09-01 13:26:59,032 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-09-01 13:26:59,032 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 684 transitions, 13471 flow [2023-09-01 13:26:59,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.83333333333333) internal successors, (389), 6 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:59,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:59,033 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:59,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:59,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:59,238 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:59,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:59,238 INFO L85 PathProgramCache]: Analyzing trace with hash 937724473, now seen corresponding path program 16 times [2023-09-01 13:26:59,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:59,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989119147] [2023-09-01 13:26:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:59,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:59,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:59,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989119147] [2023-09-01 13:26:59,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989119147] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:59,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452176433] [2023-09-01 13:26:59,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:26:59,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:59,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:59,345 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) [2023-09-01 13:26:59,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 13:26:59,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:26:59,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:59,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:26:59,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:59,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:59,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452176433] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:59,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:59,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-09-01 13:26:59,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621479765] [2023-09-01 13:26:59,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:59,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:26:59,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:59,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:26:59,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:26:59,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:26:59,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 684 transitions, 13471 flow. Second operand has 17 states, 17 states have (on average 54.88235294117647) internal successors, (933), 17 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:59,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:59,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:26:59,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:01,005 INFO L130 PetriNetUnfolder]: 2484/4916 cut-off events. [2023-09-01 13:27:01,006 INFO L131 PetriNetUnfolder]: For 122289/122289 co-relation queries the response was YES. [2023-09-01 13:27:01,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42195 conditions, 4916 events. 2484/4916 cut-off events. For 122289/122289 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38076 event pairs, 185 based on Foata normal form. 50/4966 useless extension candidates. Maximal degree in co-relation 40527. Up to 3712 conditions per place. [2023-09-01 13:27:01,055 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 697 selfloop transitions, 187 changer transitions 49/933 dead transitions. [2023-09-01 13:27:01,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 933 transitions, 19844 flow [2023-09-01 13:27:01,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:27:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:27:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 660 transitions. [2023-09-01 13:27:01,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-09-01 13:27:01,057 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 660 transitions. [2023-09-01 13:27:01,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 660 transitions. [2023-09-01 13:27:01,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:01,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 660 transitions. [2023-09-01 13:27:01,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 60.0) internal successors, (660), 11 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:01,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:01,061 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:01,061 INFO L175 Difference]: Start difference. First operand has 242 places, 684 transitions, 13471 flow. Second operand 11 states and 660 transitions. [2023-09-01 13:27:01,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 933 transitions, 19844 flow [2023-09-01 13:27:01,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 933 transitions, 19424 flow, removed 210 selfloop flow, removed 0 redundant places. [2023-09-01 13:27:01,929 INFO L231 Difference]: Finished difference. Result has 258 places, 808 transitions, 16838 flow [2023-09-01 13:27:01,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=13109, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16838, PETRI_PLACES=258, PETRI_TRANSITIONS=808} [2023-09-01 13:27:01,930 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2023-09-01 13:27:01,930 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 808 transitions, 16838 flow [2023-09-01 13:27:01,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.88235294117647) internal successors, (933), 17 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:01,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:01,931 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:01,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-09-01 13:27:02,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:02,134 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:02,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash 778832195, now seen corresponding path program 17 times [2023-09-01 13:27:02,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:02,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267363875] [2023-09-01 13:27:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:02,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:02,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267363875] [2023-09-01 13:27:02,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267363875] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:02,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008512582] [2023-09-01 13:27:02,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:27:02,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:02,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:02,242 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) [2023-09-01 13:27:02,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 13:27:02,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 13:27:02,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:02,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:02,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:02,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:02,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008512582] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:02,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:02,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-09-01 13:27:02,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826306469] [2023-09-01 13:27:02,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:02,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:27:02,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:27:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:27:02,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:27:02,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 808 transitions, 16838 flow. Second operand has 19 states, 19 states have (on average 54.63157894736842) internal successors, (1038), 19 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:02,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:02,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:27:02,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:04,289 INFO L130 PetriNetUnfolder]: 2839/5577 cut-off events. [2023-09-01 13:27:04,289 INFO L131 PetriNetUnfolder]: For 152962/152962 co-relation queries the response was YES. [2023-09-01 13:27:04,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49100 conditions, 5577 events. 2839/5577 cut-off events. For 152962/152962 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 43575 event pairs, 215 based on Foata normal form. 84/5661 useless extension candidates. Maximal degree in co-relation 47417. Up to 4193 conditions per place. [2023-09-01 13:27:04,348 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 763 selfloop transitions, 252 changer transitions 16/1031 dead transitions. [2023-09-01 13:27:04,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1031 transitions, 22755 flow [2023-09-01 13:27:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 13:27:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 13:27:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1008 transitions. [2023-09-01 13:27:04,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2023-09-01 13:27:04,350 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1008 transitions. [2023-09-01 13:27:04,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1008 transitions. [2023-09-01 13:27:04,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:04,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1008 transitions. [2023-09-01 13:27:04,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 59.294117647058826) internal successors, (1008), 17 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:04,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:04,355 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:04,355 INFO L175 Difference]: Start difference. First operand has 258 places, 808 transitions, 16838 flow. Second operand 17 states and 1008 transitions. [2023-09-01 13:27:04,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1031 transitions, 22755 flow [2023-09-01 13:27:05,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 1031 transitions, 22534 flow, removed 93 selfloop flow, removed 4 redundant places. [2023-09-01 13:27:05,736 INFO L231 Difference]: Finished difference. Result has 276 places, 908 transitions, 19905 flow [2023-09-01 13:27:05,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=16691, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19905, PETRI_PLACES=276, PETRI_TRANSITIONS=908} [2023-09-01 13:27:05,737 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-09-01 13:27:05,737 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 908 transitions, 19905 flow [2023-09-01 13:27:05,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.63157894736842) internal successors, (1038), 19 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:05,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:05,737 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:05,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:05,937 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,SelfDestructingSolverStorable23 [2023-09-01 13:27:05,938 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:05,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1597199923, now seen corresponding path program 18 times [2023-09-01 13:27:05,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:05,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478500319] [2023-09-01 13:27:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:05,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:06,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:06,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478500319] [2023-09-01 13:27:06,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478500319] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:06,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993302872] [2023-09-01 13:27:06,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:27:06,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:06,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:06,027 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) [2023-09-01 13:27:06,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 13:27:06,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-09-01 13:27:06,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:06,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:06,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:06,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:06,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993302872] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:06,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:06,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-09-01 13:27:06,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865425689] [2023-09-01 13:27:06,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:06,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:27:06,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:06,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:27:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:27:06,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:27:06,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 908 transitions, 19905 flow. Second operand has 18 states, 18 states have (on average 54.666666666666664) internal successors, (984), 18 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:06,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:06,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:27:06,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:09,011 INFO L130 PetriNetUnfolder]: 3334/6619 cut-off events. [2023-09-01 13:27:09,012 INFO L131 PetriNetUnfolder]: For 214686/214686 co-relation queries the response was YES. [2023-09-01 13:27:09,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61929 conditions, 6619 events. 3334/6619 cut-off events. For 214686/214686 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 53876 event pairs, 71 based on Foata normal form. 28/6647 useless extension candidates. Maximal degree in co-relation 60241. Up to 1804 conditions per place. [2023-09-01 13:27:09,070 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 323 selfloop transitions, 876 changer transitions 45/1244 dead transitions. [2023-09-01 13:27:09,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1244 transitions, 28036 flow [2023-09-01 13:27:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 13:27:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 13:27:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2847 transitions. [2023-09-01 13:27:09,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611273080660836 [2023-09-01 13:27:09,074 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2847 transitions. [2023-09-01 13:27:09,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2847 transitions. [2023-09-01 13:27:09,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:09,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2847 transitions. [2023-09-01 13:27:09,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 58.10204081632653) internal successors, (2847), 49 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:09,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 126.0) internal successors, (6300), 50 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:09,217 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 126.0) internal successors, (6300), 50 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:09,217 INFO L175 Difference]: Start difference. First operand has 276 places, 908 transitions, 19905 flow. Second operand 49 states and 2847 transitions. [2023-09-01 13:27:09,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1244 transitions, 28036 flow [2023-09-01 13:27:11,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1244 transitions, 27515 flow, removed 235 selfloop flow, removed 5 redundant places. [2023-09-01 13:27:11,129 INFO L231 Difference]: Finished difference. Result has 328 places, 1079 transitions, 26074 flow [2023-09-01 13:27:11,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=19498, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=730, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=26074, PETRI_PLACES=328, PETRI_TRANSITIONS=1079} [2023-09-01 13:27:11,129 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 308 predicate places. [2023-09-01 13:27:11,129 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 1079 transitions, 26074 flow [2023-09-01 13:27:11,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.666666666666664) internal successors, (984), 18 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:11,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:11,130 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:11,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:11,330 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,SelfDestructingSolverStorable24 [2023-09-01 13:27:11,330 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:11,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1546373287, now seen corresponding path program 19 times [2023-09-01 13:27:11,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:11,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251710930] [2023-09-01 13:27:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:11,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:11,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:11,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251710930] [2023-09-01 13:27:11,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251710930] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:11,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262859478] [2023-09-01 13:27:11,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:27:11,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:11,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:11,429 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) [2023-09-01 13:27:11,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 13:27:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:11,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:11,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:11,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:11,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262859478] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:11,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:11,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-09-01 13:27:11,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821730157] [2023-09-01 13:27:11,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:11,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:27:11,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:11,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:27:11,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:27:11,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:27:11,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 1079 transitions, 26074 flow. Second operand has 18 states, 18 states have (on average 54.833333333333336) internal successors, (987), 18 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:11,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:11,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:27:11,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:14,699 INFO L130 PetriNetUnfolder]: 3740/7309 cut-off events. [2023-09-01 13:27:14,699 INFO L131 PetriNetUnfolder]: For 300889/300889 co-relation queries the response was YES. [2023-09-01 13:27:14,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73417 conditions, 7309 events. 3740/7309 cut-off events. For 300889/300889 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 59672 event pairs, 207 based on Foata normal form. 206/7515 useless extension candidates. Maximal degree in co-relation 71604. Up to 3448 conditions per place. [2023-09-01 13:27:14,773 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 690 selfloop transitions, 666 changer transitions 15/1371 dead transitions. [2023-09-01 13:27:14,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1371 transitions, 34330 flow [2023-09-01 13:27:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 13:27:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 13:27:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1764 transitions. [2023-09-01 13:27:14,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-09-01 13:27:14,775 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1764 transitions. [2023-09-01 13:27:14,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1764 transitions. [2023-09-01 13:27:14,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:14,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1764 transitions. [2023-09-01 13:27:14,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.8) internal successors, (1764), 30 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:14,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:14,782 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:14,782 INFO L175 Difference]: Start difference. First operand has 328 places, 1079 transitions, 26074 flow. Second operand 30 states and 1764 transitions. [2023-09-01 13:27:14,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1371 transitions, 34330 flow [2023-09-01 13:27:18,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1371 transitions, 30677 flow, removed 1449 selfloop flow, removed 17 redundant places. [2023-09-01 13:27:18,134 INFO L231 Difference]: Finished difference. Result has 345 places, 1233 transitions, 28990 flow [2023-09-01 13:27:18,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=22899, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=28990, PETRI_PLACES=345, PETRI_TRANSITIONS=1233} [2023-09-01 13:27:18,135 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 325 predicate places. [2023-09-01 13:27:18,136 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1233 transitions, 28990 flow [2023-09-01 13:27:18,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.833333333333336) internal successors, (987), 18 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:18,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:18,136 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:18,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:18,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 13:27:18,342 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:18,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash 672632607, now seen corresponding path program 20 times [2023-09-01 13:27:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:18,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359308101] [2023-09-01 13:27:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:18,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:18,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359308101] [2023-09-01 13:27:18,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359308101] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:18,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136344668] [2023-09-01 13:27:18,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:27:18,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:18,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:18,453 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) [2023-09-01 13:27:18,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 13:27:18,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:27:18,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:18,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:18,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:18,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:18,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136344668] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:18,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:18,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-09-01 13:27:18,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177226526] [2023-09-01 13:27:18,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:27:18,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:18,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:27:18,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:27:18,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:27:18,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1233 transitions, 28990 flow. Second operand has 18 states, 18 states have (on average 54.833333333333336) internal successors, (987), 18 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:18,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:18,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:27:18,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:22,187 INFO L130 PetriNetUnfolder]: 3694/7225 cut-off events. [2023-09-01 13:27:22,187 INFO L131 PetriNetUnfolder]: For 263741/263741 co-relation queries the response was YES. [2023-09-01 13:27:22,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70732 conditions, 7225 events. 3694/7225 cut-off events. For 263741/263741 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 58818 event pairs, 101 based on Foata normal form. 60/7285 useless extension candidates. Maximal degree in co-relation 68916. Up to 2048 conditions per place. [2023-09-01 13:27:22,259 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 423 selfloop transitions, 919 changer transitions 1/1343 dead transitions. [2023-09-01 13:27:22,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1343 transitions, 32618 flow [2023-09-01 13:27:22,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 13:27:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 13:27:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2050 transitions. [2023-09-01 13:27:22,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46485260770975056 [2023-09-01 13:27:22,262 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2050 transitions. [2023-09-01 13:27:22,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2050 transitions. [2023-09-01 13:27:22,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:22,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2050 transitions. [2023-09-01 13:27:22,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 58.57142857142857) internal successors, (2050), 35 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 126.0) internal successors, (4536), 36 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,269 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 126.0) internal successors, (4536), 36 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,269 INFO L175 Difference]: Start difference. First operand has 345 places, 1233 transitions, 28990 flow. Second operand 35 states and 2050 transitions. [2023-09-01 13:27:22,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1343 transitions, 32618 flow [2023-09-01 13:27:25,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1343 transitions, 31888 flow, removed 198 selfloop flow, removed 13 redundant places. [2023-09-01 13:27:25,538 INFO L231 Difference]: Finished difference. Result has 367 places, 1234 transitions, 30706 flow [2023-09-01 13:27:25,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=28114, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=907, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=30706, PETRI_PLACES=367, PETRI_TRANSITIONS=1234} [2023-09-01 13:27:25,539 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 347 predicate places. [2023-09-01 13:27:25,539 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1234 transitions, 30706 flow [2023-09-01 13:27:25,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.833333333333336) internal successors, (987), 18 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:25,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:25,540 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:25,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-09-01 13:27:25,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:25,746 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:25,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:25,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1182775093, now seen corresponding path program 21 times [2023-09-01 13:27:25,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:25,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840150326] [2023-09-01 13:27:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:25,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:25,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:25,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840150326] [2023-09-01 13:27:25,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840150326] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:25,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177845103] [2023-09-01 13:27:25,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:27:25,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:25,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:25,849 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) [2023-09-01 13:27:25,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 13:27:25,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:27:25,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:25,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:25,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:26,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:27:26,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177845103] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:26,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:26,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-09-01 13:27:26,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359379135] [2023-09-01 13:27:26,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:26,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:27:26,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:27:26,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:27:26,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:27:26,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1234 transitions, 30706 flow. Second operand has 19 states, 19 states have (on average 54.8421052631579) internal successors, (1042), 19 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:26,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:26,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:27:26,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:29,469 INFO L130 PetriNetUnfolder]: 4156/8089 cut-off events. [2023-09-01 13:27:29,469 INFO L131 PetriNetUnfolder]: For 313538/313538 co-relation queries the response was YES. [2023-09-01 13:27:29,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82105 conditions, 8089 events. 4156/8089 cut-off events. For 313538/313538 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 67099 event pairs, 287 based on Foata normal form. 70/8159 useless extension candidates. Maximal degree in co-relation 80288. Up to 5956 conditions per place. [2023-09-01 13:27:29,556 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1100 selfloop transitions, 400 changer transitions 13/1513 dead transitions. [2023-09-01 13:27:29,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1513 transitions, 39593 flow [2023-09-01 13:27:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 13:27:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 13:27:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1182 transitions. [2023-09-01 13:27:29,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2023-09-01 13:27:29,557 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1182 transitions. [2023-09-01 13:27:29,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1182 transitions. [2023-09-01 13:27:29,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:29,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1182 transitions. [2023-09-01 13:27:29,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 59.1) internal successors, (1182), 20 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:29,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:29,562 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:29,562 INFO L175 Difference]: Start difference. First operand has 367 places, 1234 transitions, 30706 flow. Second operand 20 states and 1182 transitions. [2023-09-01 13:27:29,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1513 transitions, 39593 flow [2023-09-01 13:27:33,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1513 transitions, 38437 flow, removed 95 selfloop flow, removed 28 redundant places. [2023-09-01 13:27:33,475 INFO L231 Difference]: Finished difference. Result has 367 places, 1362 transitions, 34706 flow [2023-09-01 13:27:33,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=29714, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=34706, PETRI_PLACES=367, PETRI_TRANSITIONS=1362} [2023-09-01 13:27:33,476 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 347 predicate places. [2023-09-01 13:27:33,477 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1362 transitions, 34706 flow [2023-09-01 13:27:33,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.8421052631579) internal successors, (1042), 19 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:33,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:33,477 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:33,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:33,681 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,SelfDestructingSolverStorable27 [2023-09-01 13:27:33,682 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:33,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:33,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1739013303, now seen corresponding path program 22 times [2023-09-01 13:27:33,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:33,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786680940] [2023-09-01 13:27:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:33,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:33,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:33,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786680940] [2023-09-01 13:27:33,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786680940] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:33,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960343434] [2023-09-01 13:27:33,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:27:33,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:33,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:33,780 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) [2023-09-01 13:27:33,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 13:27:33,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:27:33,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:33,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:33,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:33,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960343434] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:33,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:33,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2023-09-01 13:27:33,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739041205] [2023-09-01 13:27:33,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:33,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:27:33,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:27:33,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:27:34,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:27:34,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1362 transitions, 34706 flow. Second operand has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:34,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:34,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:27:34,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:38,185 INFO L130 PetriNetUnfolder]: 4560/8863 cut-off events. [2023-09-01 13:27:38,185 INFO L131 PetriNetUnfolder]: For 343867/343867 co-relation queries the response was YES. [2023-09-01 13:27:38,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92152 conditions, 8863 events. 4560/8863 cut-off events. For 343867/343867 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 74796 event pairs, 231 based on Foata normal form. 56/8919 useless extension candidates. Maximal degree in co-relation 90940. Up to 5093 conditions per place. [2023-09-01 13:27:38,282 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 902 selfloop transitions, 762 changer transitions 18/1682 dead transitions. [2023-09-01 13:27:38,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1682 transitions, 44593 flow [2023-09-01 13:27:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 13:27:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 13:27:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1476 transitions. [2023-09-01 13:27:38,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2023-09-01 13:27:38,284 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1476 transitions. [2023-09-01 13:27:38,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1476 transitions. [2023-09-01 13:27:38,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:38,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1476 transitions. [2023-09-01 13:27:38,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 59.04) internal successors, (1476), 25 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:38,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 126.0) internal successors, (3276), 26 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:38,289 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 126.0) internal successors, (3276), 26 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:38,289 INFO L175 Difference]: Start difference. First operand has 367 places, 1362 transitions, 34706 flow. Second operand 25 states and 1476 transitions. [2023-09-01 13:27:38,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1682 transitions, 44593 flow [2023-09-01 13:27:42,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1682 transitions, 44322 flow, removed 105 selfloop flow, removed 7 redundant places. [2023-09-01 13:27:42,822 INFO L231 Difference]: Finished difference. Result has 391 places, 1520 transitions, 41276 flow [2023-09-01 13:27:42,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=34471, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=616, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=41276, PETRI_PLACES=391, PETRI_TRANSITIONS=1520} [2023-09-01 13:27:42,824 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 371 predicate places. [2023-09-01 13:27:42,824 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1520 transitions, 41276 flow [2023-09-01 13:27:42,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:42,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:42,824 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:42,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-09-01 13:27:43,027 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,SelfDestructingSolverStorable28 [2023-09-01 13:27:43,028 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:43,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:43,028 INFO L85 PathProgramCache]: Analyzing trace with hash -378475203, now seen corresponding path program 23 times [2023-09-01 13:27:43,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:43,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719646304] [2023-09-01 13:27:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:43,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:43,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:43,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719646304] [2023-09-01 13:27:43,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719646304] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:43,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033287524] [2023-09-01 13:27:43,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:27:43,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:43,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:43,113 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) [2023-09-01 13:27:43,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 13:27:43,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 13:27:43,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:43,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:43,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:43,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:43,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033287524] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:43,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:43,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-09-01 13:27:43,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067325772] [2023-09-01 13:27:43,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:43,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:27:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:27:43,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:27:43,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:27:43,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1520 transitions, 41276 flow. Second operand has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:43,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:43,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:27:43,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:47,915 INFO L130 PetriNetUnfolder]: 4794/9325 cut-off events. [2023-09-01 13:27:47,915 INFO L131 PetriNetUnfolder]: For 437003/437003 co-relation queries the response was YES. [2023-09-01 13:27:47,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101177 conditions, 9325 events. 4794/9325 cut-off events. For 437003/437003 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 79305 event pairs, 123 based on Foata normal form. 160/9485 useless extension candidates. Maximal degree in co-relation 99780. Up to 2638 conditions per place. [2023-09-01 13:27:48,025 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 555 selfloop transitions, 1191 changer transitions 17/1763 dead transitions. [2023-09-01 13:27:48,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1763 transitions, 49308 flow [2023-09-01 13:27:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 13:27:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 13:27:48,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1584 transitions. [2023-09-01 13:27:48,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2023-09-01 13:27:48,027 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1584 transitions. [2023-09-01 13:27:48,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1584 transitions. [2023-09-01 13:27:48,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:48,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1584 transitions. [2023-09-01 13:27:48,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 58.666666666666664) internal successors, (1584), 27 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:48,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 126.0) internal successors, (3528), 28 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:48,133 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 126.0) internal successors, (3528), 28 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:48,133 INFO L175 Difference]: Start difference. First operand has 391 places, 1520 transitions, 41276 flow. Second operand 27 states and 1584 transitions. [2023-09-01 13:27:48,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1763 transitions, 49308 flow [2023-09-01 13:27:53,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1763 transitions, 47812 flow, removed 349 selfloop flow, removed 9 redundant places. [2023-09-01 13:27:53,805 INFO L231 Difference]: Finished difference. Result has 412 places, 1620 transitions, 46601 flow [2023-09-01 13:27:53,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=39850, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=46601, PETRI_PLACES=412, PETRI_TRANSITIONS=1620} [2023-09-01 13:27:53,806 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-09-01 13:27:53,806 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1620 transitions, 46601 flow [2023-09-01 13:27:53,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:53,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:53,806 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:53,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-09-01 13:27:54,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:54,007 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:54,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:54,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1543577845, now seen corresponding path program 24 times [2023-09-01 13:27:54,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:54,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093455491] [2023-09-01 13:27:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:54,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:54,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093455491] [2023-09-01 13:27:54,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093455491] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:54,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307240871] [2023-09-01 13:27:54,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:27:54,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:54,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:54,113 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) [2023-09-01 13:27:54,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 13:27:54,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:27:54,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:54,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:54,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:54,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:54,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307240871] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:54,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:54,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-09-01 13:27:54,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62546691] [2023-09-01 13:27:54,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:54,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:27:54,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:54,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:27:54,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-09-01 13:27:54,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:27:54,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1620 transitions, 46601 flow. Second operand has 23 states, 23 states have (on average 54.69565217391305) internal successors, (1258), 23 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:54,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:54,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:27:54,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:28:01,790 INFO L130 PetriNetUnfolder]: 7192/13685 cut-off events. [2023-09-01 13:28:01,790 INFO L131 PetriNetUnfolder]: For 603463/603463 co-relation queries the response was YES. [2023-09-01 13:28:01,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159847 conditions, 13685 events. 7192/13685 cut-off events. For 603463/603463 co-relation queries the response was YES. Maximal size of possible extension queue 1087. Compared 120476 event pairs, 311 based on Foata normal form. 96/13781 useless extension candidates. Maximal degree in co-relation 158012. Up to 7156 conditions per place. [2023-09-01 13:28:01,962 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1398 selfloop transitions, 1222 changer transitions 28/2648 dead transitions. [2023-09-01 13:28:01,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 2648 transitions, 81246 flow [2023-09-01 13:28:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 13:28:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 13:28:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1776 transitions. [2023-09-01 13:28:01,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46984126984126984 [2023-09-01 13:28:01,964 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1776 transitions. [2023-09-01 13:28:01,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1776 transitions. [2023-09-01 13:28:01,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:28:01,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1776 transitions. [2023-09-01 13:28:01,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 59.2) internal successors, (1776), 30 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:01,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:01,970 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:01,970 INFO L175 Difference]: Start difference. First operand has 412 places, 1620 transitions, 46601 flow. Second operand 30 states and 1776 transitions. [2023-09-01 13:28:01,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 2648 transitions, 81246 flow [2023-09-01 13:28:13,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 2648 transitions, 80012 flow, removed 359 selfloop flow, removed 16 redundant places. [2023-09-01 13:28:13,908 INFO L231 Difference]: Finished difference. Result has 440 places, 2398 transitions, 75751 flow [2023-09-01 13:28:13,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=45775, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=75751, PETRI_PLACES=440, PETRI_TRANSITIONS=2398} [2023-09-01 13:28:13,910 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 420 predicate places. [2023-09-01 13:28:13,910 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 2398 transitions, 75751 flow [2023-09-01 13:28:13,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.69565217391305) internal successors, (1258), 23 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:13,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:28:13,911 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:28:13,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 13:28:14,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:14,116 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:28:14,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:28:14,117 INFO L85 PathProgramCache]: Analyzing trace with hash 827009771, now seen corresponding path program 25 times [2023-09-01 13:28:14,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:28:14,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418135645] [2023-09-01 13:28:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:28:14,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:28:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:28:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:14,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:28:14,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418135645] [2023-09-01 13:28:14,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418135645] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:28:14,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093085612] [2023-09-01 13:28:14,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:28:14,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:14,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:28:14,209 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) [2023-09-01 13:28:14,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 13:28:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:28:14,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:28:14,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:28:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:14,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:28:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:14,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093085612] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:28:14,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:28:14,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-09-01 13:28:14,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709440878] [2023-09-01 13:28:14,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:28:14,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:28:14,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:28:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:28:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:28:14,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:28:14,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 2398 transitions, 75751 flow. Second operand has 19 states, 19 states have (on average 54.8421052631579) internal successors, (1042), 19 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:14,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:28:14,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:28:14,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:28:26,017 INFO L130 PetriNetUnfolder]: 8823/16847 cut-off events. [2023-09-01 13:28:26,017 INFO L131 PetriNetUnfolder]: For 927633/927633 co-relation queries the response was YES. [2023-09-01 13:28:26,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205083 conditions, 16847 events. 8823/16847 cut-off events. For 927633/927633 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 153765 event pairs, 215 based on Foata normal form. 210/17057 useless extension candidates. Maximal degree in co-relation 203250. Up to 5130 conditions per place. [2023-09-01 13:28:26,256 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 850 selfloop transitions, 2287 changer transitions 34/3171 dead transitions. [2023-09-01 13:28:26,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 3171 transitions, 102319 flow [2023-09-01 13:28:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 13:28:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 13:28:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1828 transitions. [2023-09-01 13:28:26,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679979518689196 [2023-09-01 13:28:26,258 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1828 transitions. [2023-09-01 13:28:26,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1828 transitions. [2023-09-01 13:28:26,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:28:26,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1828 transitions. [2023-09-01 13:28:26,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 58.96774193548387) internal successors, (1828), 31 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:26,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:26,264 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:26,264 INFO L175 Difference]: Start difference. First operand has 440 places, 2398 transitions, 75751 flow. Second operand 31 states and 1828 transitions. [2023-09-01 13:28:26,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 3171 transitions, 102319 flow [2023-09-01 13:28:44,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 3171 transitions, 100733 flow, removed 767 selfloop flow, removed 5 redundant places. [2023-09-01 13:28:44,889 INFO L231 Difference]: Finished difference. Result has 476 places, 2952 transitions, 99816 flow [2023-09-01 13:28:44,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=74399, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=99816, PETRI_PLACES=476, PETRI_TRANSITIONS=2952} [2023-09-01 13:28:44,890 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 456 predicate places. [2023-09-01 13:28:44,891 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 2952 transitions, 99816 flow [2023-09-01 13:28:44,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.8421052631579) internal successors, (1042), 19 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:44,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:28:44,891 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:28:44,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-09-01 13:28:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:45,092 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:28:45,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:28:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash 552340077, now seen corresponding path program 26 times [2023-09-01 13:28:45,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:28:45,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550939660] [2023-09-01 13:28:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:28:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:28:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:28:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:28:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550939660] [2023-09-01 13:28:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550939660] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:28:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124682903] [2023-09-01 13:28:45,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:28:45,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:28:45,197 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) [2023-09-01 13:28:45,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 13:28:45,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:28:45,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:28:45,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:28:45,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:28:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:45,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:28:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:45,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124682903] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:28:45,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:28:45,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-09-01 13:28:45,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674759663] [2023-09-01 13:28:45,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:28:45,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 13:28:45,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:28:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 13:28:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-09-01 13:28:45,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:28:45,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 2952 transitions, 99816 flow. Second operand has 25 states, 25 states have (on average 54.44) internal successors, (1361), 25 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:45,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:28:45,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:28:45,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:28:59,282 INFO L130 PetriNetUnfolder]: 8983/17153 cut-off events. [2023-09-01 13:28:59,282 INFO L131 PetriNetUnfolder]: For 1004046/1004046 co-relation queries the response was YES. [2023-09-01 13:28:59,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219236 conditions, 17153 events. 8983/17153 cut-off events. For 1004046/1004046 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 156556 event pairs, 3096 based on Foata normal form. 136/17289 useless extension candidates. Maximal degree in co-relation 217186. Up to 15357 conditions per place. [2023-09-01 13:28:59,551 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 2833 selfloop transitions, 320 changer transitions 43/3196 dead transitions. [2023-09-01 13:28:59,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 3196 transitions, 109711 flow [2023-09-01 13:28:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 13:28:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 13:28:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1846 transitions. [2023-09-01 13:28:59,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726062467997952 [2023-09-01 13:28:59,554 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1846 transitions. [2023-09-01 13:28:59,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1846 transitions. [2023-09-01 13:28:59,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:28:59,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1846 transitions. [2023-09-01 13:28:59,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 59.54838709677419) internal successors, (1846), 31 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:59,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:59,560 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:59,560 INFO L175 Difference]: Start difference. First operand has 476 places, 2952 transitions, 99816 flow. Second operand 31 states and 1846 transitions. [2023-09-01 13:28:59,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 3196 transitions, 109711 flow [2023-09-01 13:29:25,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 3196 transitions, 108232 flow, removed 632 selfloop flow, removed 12 redundant places. [2023-09-01 13:29:26,061 INFO L231 Difference]: Finished difference. Result has 506 places, 3033 transitions, 101263 flow [2023-09-01 13:29:26,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=98337, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=101263, PETRI_PLACES=506, PETRI_TRANSITIONS=3033} [2023-09-01 13:29:26,063 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-09-01 13:29:26,063 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 3033 transitions, 101263 flow [2023-09-01 13:29:26,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.44) internal successors, (1361), 25 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:26,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:29:26,064 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:29:26,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-09-01 13:29:26,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:29:26,264 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:29:26,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:29:26,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1370707805, now seen corresponding path program 27 times [2023-09-01 13:29:26,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:29:26,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549413362] [2023-09-01 13:29:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:29:26,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:29:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:29:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:29:26,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:29:26,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549413362] [2023-09-01 13:29:26,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549413362] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:29:26,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986679058] [2023-09-01 13:29:26,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:29:26,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:29:26,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:29:26,365 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) [2023-09-01 13:29:26,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 13:29:26,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-09-01 13:29:26,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:29:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:29:26,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:29:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:29:26,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:29:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:29:26,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986679058] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:29:26,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:29:26,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2023-09-01 13:29:26,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135932547] [2023-09-01 13:29:26,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:29:26,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:29:26,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:29:26,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:29:26,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:29:26,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:29:26,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 3033 transitions, 101263 flow. Second operand has 21 states, 21 states have (on average 54.666666666666664) internal successors, (1148), 21 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:26,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:29:26,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:29:26,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:29:42,517 INFO L130 PetriNetUnfolder]: 9044/17266 cut-off events. [2023-09-01 13:29:42,517 INFO L131 PetriNetUnfolder]: For 982340/982340 co-relation queries the response was YES. [2023-09-01 13:29:42,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221286 conditions, 17266 events. 9044/17266 cut-off events. For 982340/982340 co-relation queries the response was YES. Maximal size of possible extension queue 1422. Compared 157883 event pairs, 1047 based on Foata normal form. 6/17272 useless extension candidates. Maximal degree in co-relation 219328. Up to 6051 conditions per place. [2023-09-01 13:29:42,785 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1887 selfloop transitions, 1293 changer transitions 19/3199 dead transitions. [2023-09-01 13:29:42,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 3199 transitions, 110179 flow [2023-09-01 13:29:42,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 13:29:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 13:29:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2125 transitions. [2023-09-01 13:29:42,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45581295581295583 [2023-09-01 13:29:42,787 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2125 transitions. [2023-09-01 13:29:42,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2125 transitions. [2023-09-01 13:29:42,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:29:42,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2125 transitions. [2023-09-01 13:29:42,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.432432432432435) internal successors, (2125), 37 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:42,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 126.0) internal successors, (4788), 38 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:42,791 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 126.0) internal successors, (4788), 38 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:42,791 INFO L175 Difference]: Start difference. First operand has 506 places, 3033 transitions, 101263 flow. Second operand 37 states and 2125 transitions. [2023-09-01 13:29:42,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 3199 transitions, 110179 flow [2023-09-01 13:30:09,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 3199 transitions, 107760 flow, removed 683 selfloop flow, removed 8 redundant places. [2023-09-01 13:30:09,121 INFO L231 Difference]: Finished difference. Result has 538 places, 3104 transitions, 103243 flow [2023-09-01 13:30:09,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=99106, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=103243, PETRI_PLACES=538, PETRI_TRANSITIONS=3104} [2023-09-01 13:30:09,123 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 518 predicate places. [2023-09-01 13:30:09,123 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 3104 transitions, 103243 flow [2023-09-01 13:30:09,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.666666666666664) internal successors, (1148), 21 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:09,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:30:09,123 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:30:09,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-09-01 13:30:09,323 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,SelfDestructingSolverStorable33 [2023-09-01 13:30:09,324 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:30:09,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:30:09,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1617405810, now seen corresponding path program 28 times [2023-09-01 13:30:09,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:30:09,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441895177] [2023-09-01 13:30:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:30:09,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:30:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:30:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:30:09,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:30:09,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441895177] [2023-09-01 13:30:09,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441895177] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:30:09,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829670401] [2023-09-01 13:30:09,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:30:09,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:30:09,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:30:09,432 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) [2023-09-01 13:30:09,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 13:30:09,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:30:09,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:30:09,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 13:30:09,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:30:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:30:09,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:30:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:30:09,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829670401] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:30:09,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:30:09,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2023-09-01 13:30:09,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272180835] [2023-09-01 13:30:09,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:30:09,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:30:09,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:30:09,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:30:09,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:30:09,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2023-09-01 13:30:09,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 3104 transitions, 103243 flow. Second operand has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 12 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:09,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:30:09,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2023-09-01 13:30:09,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:30:30,853 INFO L130 PetriNetUnfolder]: 12403/23554 cut-off events. [2023-09-01 13:30:30,854 INFO L131 PetriNetUnfolder]: For 1435159/1435169 co-relation queries the response was YES. [2023-09-01 13:30:31,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304414 conditions, 23554 events. 12403/23554 cut-off events. For 1435159/1435169 co-relation queries the response was YES. Maximal size of possible extension queue 1902. Compared 224381 event pairs, 868 based on Foata normal form. 40/23592 useless extension candidates. Maximal degree in co-relation 301635. Up to 13343 conditions per place. [2023-09-01 13:30:31,359 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 2525 selfloop transitions, 1684 changer transitions 255/4473 dead transitions. [2023-09-01 13:30:31,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 4473 transitions, 152255 flow [2023-09-01 13:30:31,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:30:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:30:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 502 transitions. [2023-09-01 13:30:31,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691609977324263 [2023-09-01 13:30:31,360 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 502 transitions. [2023-09-01 13:30:31,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 502 transitions. [2023-09-01 13:30:31,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:30:31,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 502 transitions. [2023-09-01 13:30:31,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:31,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:31,362 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:31,363 INFO L175 Difference]: Start difference. First operand has 538 places, 3104 transitions, 103243 flow. Second operand 7 states and 502 transitions. [2023-09-01 13:30:31,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 4473 transitions, 152255 flow [2023-09-01 13:31:12,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 4473 transitions, 150505 flow, removed 500 selfloop flow, removed 13 redundant places. [2023-09-01 13:31:12,262 INFO L231 Difference]: Finished difference. Result has 535 places, 4047 transitions, 139725 flow [2023-09-01 13:31:12,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=102268, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=722, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139725, PETRI_PLACES=535, PETRI_TRANSITIONS=4047} [2023-09-01 13:31:12,265 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 515 predicate places. [2023-09-01 13:31:12,265 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 4047 transitions, 139725 flow [2023-09-01 13:31:12,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 12 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:31:12,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:31:12,266 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:31:12,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 13:31:12,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:31:12,472 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:31:12,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:31:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1426821311, now seen corresponding path program 29 times [2023-09-01 13:31:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:31:12,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28273434] [2023-09-01 13:31:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:31:12,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:31:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:31:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:31:12,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:31:12,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28273434] [2023-09-01 13:31:12,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28273434] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:31:12,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500708361] [2023-09-01 13:31:12,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:31:12,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:31:12,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:31:12,591 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) [2023-09-01 13:31:12,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 13:31:12,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 13:31:12,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:31:12,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 13:31:12,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:31:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:31:12,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:31:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:31:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500708361] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:31:12,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:31:12,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-09-01 13:31:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184710373] [2023-09-01 13:31:12,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:31:12,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:31:12,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:31:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:31:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:31:12,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:31:12,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 4047 transitions, 139725 flow. Second operand has 20 states, 20 states have (on average 54.75) internal successors, (1095), 20 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:31:12,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:31:12,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:31:12,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:31:44,962 INFO L130 PetriNetUnfolder]: 14625/27800 cut-off events. [2023-09-01 13:31:44,963 INFO L131 PetriNetUnfolder]: For 1781125/1781125 co-relation queries the response was YES. [2023-09-01 13:31:45,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376816 conditions, 27800 events. 14625/27800 cut-off events. For 1781125/1781125 co-relation queries the response was YES. Maximal size of possible extension queue 2164. Compared 270041 event pairs, 1153 based on Foata normal form. 80/27880 useless extension candidates. Maximal degree in co-relation 373213. Up to 22727 conditions per place. [2023-09-01 13:31:45,542 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 4191 selfloop transitions, 877 changer transitions 69/5137 dead transitions. [2023-09-01 13:31:45,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 5137 transitions, 187665 flow [2023-09-01 13:31:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:31:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:31:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 778 transitions. [2023-09-01 13:31:45,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47496947496947495 [2023-09-01 13:31:45,544 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 778 transitions. [2023-09-01 13:31:45,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 778 transitions. [2023-09-01 13:31:45,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:31:45,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 778 transitions. [2023-09-01 13:31:45,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:31:45,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:31:45,546 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:31:45,546 INFO L175 Difference]: Start difference. First operand has 535 places, 4047 transitions, 139725 flow. Second operand 13 states and 778 transitions. [2023-09-01 13:31:45,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 5137 transitions, 187665 flow [2023-09-01 13:32:47,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 5137 transitions, 185601 flow, removed 965 selfloop flow, removed 2 redundant places. [2023-09-01 13:32:47,781 INFO L231 Difference]: Finished difference. Result has 552 places, 4769 transitions, 171341 flow [2023-09-01 13:32:47,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=137738, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=171341, PETRI_PLACES=552, PETRI_TRANSITIONS=4769} [2023-09-01 13:32:47,784 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 532 predicate places. [2023-09-01 13:32:47,784 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 4769 transitions, 171341 flow [2023-09-01 13:32:47,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.75) internal successors, (1095), 20 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:47,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:32:47,784 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:32:47,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 13:32:47,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:32:47,985 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:32:47,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:32:47,985 INFO L85 PathProgramCache]: Analyzing trace with hash -2068517451, now seen corresponding path program 30 times [2023-09-01 13:32:47,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:32:47,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90878298] [2023-09-01 13:32:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:32:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:32:48,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:32:48,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90878298] [2023-09-01 13:32:48,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90878298] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:32:48,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420477059] [2023-09-01 13:32:48,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:32:48,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:32:48,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:32:48,133 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) [2023-09-01 13:32:48,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 13:32:48,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 13:32:48,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:32:48,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 13:32:48,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:32:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:32:48,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:32:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:32:48,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420477059] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:32:48,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:32:48,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2023-09-01 13:32:48,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277623560] [2023-09-01 13:32:48,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:32:48,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:32:48,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:32:48,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:32:48,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:32:48,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:32:48,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 4769 transitions, 171341 flow. Second operand has 22 states, 22 states have (on average 54.54545454545455) internal successors, (1200), 22 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:48,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:32:48,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:32:48,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:33:32,414 INFO L130 PetriNetUnfolder]: 16093/30512 cut-off events. [2023-09-01 13:33:32,414 INFO L131 PetriNetUnfolder]: For 2000119/2000119 co-relation queries the response was YES. [2023-09-01 13:33:32,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419588 conditions, 30512 events. 16093/30512 cut-off events. For 2000119/2000119 co-relation queries the response was YES. Maximal size of possible extension queue 2260. Compared 298375 event pairs, 1155 based on Foata normal form. 80/30592 useless extension candidates. Maximal degree in co-relation 416209. Up to 23369 conditions per place. [2023-09-01 13:33:33,047 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 4211 selfloop transitions, 1280 changer transitions 20/5511 dead transitions. [2023-09-01 13:33:33,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 5511 transitions, 205790 flow [2023-09-01 13:33:33,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 13:33:33,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 13:33:33,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1185 transitions. [2023-09-01 13:33:33,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2023-09-01 13:33:33,048 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1185 transitions. [2023-09-01 13:33:33,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1185 transitions. [2023-09-01 13:33:33,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:33:33,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1185 transitions. [2023-09-01 13:33:33,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 59.25) internal successors, (1185), 20 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:33,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:33,051 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:33,051 INFO L175 Difference]: Start difference. First operand has 552 places, 4769 transitions, 171341 flow. Second operand 20 states and 1185 transitions. [2023-09-01 13:33:33,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 5511 transitions, 205790 flow [2023-09-01 13:34:48,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 5511 transitions, 205416 flow, removed 168 selfloop flow, removed 4 redundant places. [2023-09-01 13:34:48,913 INFO L231 Difference]: Finished difference. Result has 573 places, 5167 transitions, 191064 flow [2023-09-01 13:34:48,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=171057, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=938, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=191064, PETRI_PLACES=573, PETRI_TRANSITIONS=5167} [2023-09-01 13:34:48,916 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 553 predicate places. [2023-09-01 13:34:48,916 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 5167 transitions, 191064 flow [2023-09-01 13:34:48,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.54545454545455) internal successors, (1200), 22 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:48,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:34:48,917 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:34:48,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 13:34:49,117 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,SelfDestructingSolverStorable36 [2023-09-01 13:34:49,117 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:34:49,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:34:49,118 INFO L85 PathProgramCache]: Analyzing trace with hash 78564277, now seen corresponding path program 31 times [2023-09-01 13:34:49,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:34:49,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439885148] [2023-09-01 13:34:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:34:49,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:34:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:34:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:34:49,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:34:49,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439885148] [2023-09-01 13:34:49,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439885148] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:34:49,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177580610] [2023-09-01 13:34:49,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:34:49,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:34:49,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:34:49,237 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) [2023-09-01 13:34:49,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 13:34:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:34:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 13:34:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:34:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:34:49,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:34:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:34:49,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177580610] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:34:49,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:34:49,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2023-09-01 13:34:49,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775971474] [2023-09-01 13:34:49,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:34:49,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:34:49,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:34:49,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:34:49,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:34:49,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:34:49,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 5167 transitions, 191064 flow. Second operand has 21 states, 21 states have (on average 54.57142857142857) internal successors, (1146), 21 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:49,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:34:49,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:34:49,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:35:43,212 INFO L130 PetriNetUnfolder]: 16914/32172 cut-off events. [2023-09-01 13:35:43,212 INFO L131 PetriNetUnfolder]: For 2431623/2431623 co-relation queries the response was YES. [2023-09-01 13:35:43,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450992 conditions, 32172 events. 16914/32172 cut-off events. For 2431623/2431623 co-relation queries the response was YES. Maximal size of possible extension queue 2400. Compared 318567 event pairs, 243 based on Foata normal form. 166/32338 useless extension candidates. Maximal degree in co-relation 447421. Up to 9888 conditions per place. [2023-09-01 13:35:44,131 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1103 selfloop transitions, 4682 changer transitions 65/5850 dead transitions. [2023-09-01 13:35:44,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 5850 transitions, 219720 flow [2023-09-01 13:35:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-09-01 13:35:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-09-01 13:35:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3015 transitions. [2023-09-01 13:35:44,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469187675070028 [2023-09-01 13:35:44,133 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3015 transitions. [2023-09-01 13:35:44,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3015 transitions. [2023-09-01 13:35:44,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:35:44,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3015 transitions. [2023-09-01 13:35:44,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 59.11764705882353) internal successors, (3015), 51 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:44,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 126.0) internal successors, (6552), 52 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:44,141 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 126.0) internal successors, (6552), 52 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:44,141 INFO L175 Difference]: Start difference. First operand has 573 places, 5167 transitions, 191064 flow. Second operand 51 states and 3015 transitions. [2023-09-01 13:35:44,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 5850 transitions, 219720 flow [2023-09-01 13:37:10,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 5850 transitions, 218315 flow, removed 646 selfloop flow, removed 6 redundant places. [2023-09-01 13:37:10,618 INFO L231 Difference]: Finished difference. Result has 631 places, 5476 transitions, 216145 flow [2023-09-01 13:37:10,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=189765, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=216145, PETRI_PLACES=631, PETRI_TRANSITIONS=5476} [2023-09-01 13:37:10,621 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 611 predicate places. [2023-09-01 13:37:10,621 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 5476 transitions, 216145 flow [2023-09-01 13:37:10,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.57142857142857) internal successors, (1146), 21 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:10,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:37:10,622 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:37:10,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-09-01 13:37:10,822 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,SelfDestructingSolverStorable37 [2023-09-01 13:37:10,822 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:37:10,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:37:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash 938033453, now seen corresponding path program 32 times [2023-09-01 13:37:10,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:37:10,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860311524] [2023-09-01 13:37:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:37:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:37:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:37:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:37:10,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:37:10,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860311524] [2023-09-01 13:37:10,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860311524] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:37:10,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023426387] [2023-09-01 13:37:10,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:37:10,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:37:10,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:37:10,941 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) [2023-09-01 13:37:10,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 13:37:11,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:37:11,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:37:11,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 13:37:11,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:37:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:37:11,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:37:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:37:11,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023426387] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:37:11,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:37:11,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2023-09-01 13:37:11,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015643425] [2023-09-01 13:37:11,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:37:11,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:37:11,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:37:11,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:37:11,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:37:11,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:37:11,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 5476 transitions, 216145 flow. Second operand has 21 states, 21 states have (on average 54.57142857142857) internal successors, (1146), 21 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:11,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:37:11,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:37:11,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:38:03,002 INFO L130 PetriNetUnfolder]: 16865/32031 cut-off events. [2023-09-01 13:38:03,002 INFO L131 PetriNetUnfolder]: For 2626644/2626644 co-relation queries the response was YES. [2023-09-01 13:38:03,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476366 conditions, 32031 events. 16865/32031 cut-off events. For 2626644/2626644 co-relation queries the response was YES. Maximal size of possible extension queue 2405. Compared 316434 event pairs, 139 based on Foata normal form. 20/32051 useless extension candidates. Maximal degree in co-relation 472781. Up to 9892 conditions per place. [2023-09-01 13:38:03,701 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 679 selfloop transitions, 5083 changer transitions 64/5826 dead transitions. [2023-09-01 13:38:03,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 5826 transitions, 234614 flow [2023-09-01 13:38:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-09-01 13:38:03,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-09-01 13:38:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3684 transitions. [2023-09-01 13:38:03,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568452380952381 [2023-09-01 13:38:03,704 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3684 transitions. [2023-09-01 13:38:03,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3684 transitions. [2023-09-01 13:38:03,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:38:03,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3684 transitions. [2023-09-01 13:38:03,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 57.5625) internal successors, (3684), 64 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:03,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 126.0) internal successors, (8190), 65 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:03,714 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 126.0) internal successors, (8190), 65 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:03,714 INFO L175 Difference]: Start difference. First operand has 631 places, 5476 transitions, 216145 flow. Second operand 64 states and 3684 transitions. [2023-09-01 13:38:03,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 5826 transitions, 234614 flow [2023-09-01 13:39:35,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 5826 transitions, 226284 flow, removed 2642 selfloop flow, removed 27 redundant places. [2023-09-01 13:39:35,491 INFO L231 Difference]: Finished difference. Result has 668 places, 5594 transitions, 221386 flow [2023-09-01 13:39:35,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=207855, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4970, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=221386, PETRI_PLACES=668, PETRI_TRANSITIONS=5594} [2023-09-01 13:39:35,496 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 648 predicate places. [2023-09-01 13:39:35,496 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 5594 transitions, 221386 flow [2023-09-01 13:39:35,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.57142857142857) internal successors, (1146), 21 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:39:35,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:39:35,497 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:39:35,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 13:39:35,701 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,SelfDestructingSolverStorable38 [2023-09-01 13:39:35,701 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:39:35,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:39:35,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1006144169, now seen corresponding path program 33 times [2023-09-01 13:39:35,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:39:35,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130610214] [2023-09-01 13:39:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:39:35,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:39:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:39:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:39:35,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:39:35,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130610214] [2023-09-01 13:39:35,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130610214] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:39:35,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9197733] [2023-09-01 13:39:35,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:39:35,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:39:35,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:39:35,817 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) [2023-09-01 13:39:35,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 13:39:35,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 13:39:35,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:39:35,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 13:39:35,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:39:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:39:36,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:39:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:39:36,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9197733] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:39:36,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:39:36,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 22 [2023-09-01 13:39:36,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258079778] [2023-09-01 13:39:36,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:39:36,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:39:36,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:39:36,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:39:36,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:39:36,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-09-01 13:39:36,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 5594 transitions, 221386 flow. Second operand has 22 states, 22 states have (on average 54.72727272727273) internal successors, (1204), 22 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:39:36,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:39:36,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-09-01 13:39:36,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15