./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:20:11,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:20:11,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:20:11,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:20:11,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:20:11,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:20:11,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:20:11,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:20:11,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:20:11,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:20:11,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:20:11,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:20:11,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:20:11,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:20:11,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:20:11,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:20:11,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:20:11,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:20:11,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:20:11,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:20:11,220 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:20:11,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:20:11,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:20:11,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:20:11,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:20:11,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:20:11,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:20:11,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:20:11,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:20:11,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:20:11,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:20:11,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:20:11,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:20:11,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:20:11,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:20:11,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:20:11,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:20:11,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:20:11,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:20:11,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:20:11,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:20:11,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:20:11,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:20:11,283 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:20:11,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:20:11,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:20:11,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:20:11,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:20:11,286 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:20:11,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:20:11,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:20:11,287 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:20:11,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:20:11,288 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:20:11,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:20:11,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:20:11,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:20:11,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:20:11,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:20:11,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:20:11,289 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:20:11,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:20:11,289 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:20:11,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:20:11,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:20:11,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:20:11,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:20:11,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:20:11,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:20:11,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:20:11,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:20:11,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:20:11,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:20:11,292 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:20:11,292 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:20:11,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:20:11,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 [2022-07-22 21:20:11,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:20:11,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:20:11,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:20:11,573 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:20:11,574 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:20:11,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2022-07-22 21:20:11,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260f45d58/4bbf685b0056439897149ef1b50ac66c/FLAGe99df2401 [2022-07-22 21:20:12,133 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:20:12,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2022-07-22 21:20:12,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260f45d58/4bbf685b0056439897149ef1b50ac66c/FLAGe99df2401 [2022-07-22 21:20:12,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260f45d58/4bbf685b0056439897149ef1b50ac66c [2022-07-22 21:20:12,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:20:12,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:20:12,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:20:12,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:20:12,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:20:12,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:12,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d696446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12, skipping insertion in model container [2022-07-22 21:20:12,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:12,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:20:12,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:20:12,763 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:20:12,893 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2022-07-22 21:20:12,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:20:12,910 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:20:12,930 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:20:12,950 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2022-07-22 21:20:12,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:20:12,993 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:20:12,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12 WrapperNode [2022-07-22 21:20:12,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:20:12,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:20:12,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:20:12,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:20:13,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:13,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:13,050 INFO L137 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2022-07-22 21:20:13,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:20:13,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:20:13,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:20:13,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:20:13,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:13,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:13,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:13,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:13,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:13,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:13,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:13,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:20:13,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:20:13,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:20:13,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:20:13,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12" (1/1) ... [2022-07-22 21:20:13,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:20:13,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:20:13,149 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) [2022-07-22 21:20:13,161 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 [2022-07-22 21:20:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-22 21:20:13,193 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-22 21:20:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:20:13,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:20:13,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:20:13,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:20:13,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:20:13,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:20:13,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:20:13,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:20:13,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:20:13,198 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:20:13,326 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:20:13,328 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:20:13,413 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:20:13,425 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:20:13,425 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 21:20:13,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:20:13 BoogieIcfgContainer [2022-07-22 21:20:13,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:20:13,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:20:13,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:20:13,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:20:13,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:20:12" (1/3) ... [2022-07-22 21:20:13,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a5c54cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:20:13, skipping insertion in model container [2022-07-22 21:20:13,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:20:12" (2/3) ... [2022-07-22 21:20:13,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a5c54cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:20:13, skipping insertion in model container [2022-07-22 21:20:13,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:20:13" (3/3) ... [2022-07-22 21:20:13,435 INFO L111 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2022-07-22 21:20:13,439 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:20:13,447 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:20:13,448 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:20:13,448 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:20:13,474 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:20:13,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 42 transitions, 89 flow [2022-07-22 21:20:13,544 INFO L129 PetriNetUnfolder]: 2/53 cut-off events. [2022-07-22 21:20:13,544 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:20:13,547 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 53 events. 2/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 28. Up to 4 conditions per place. [2022-07-22 21:20:13,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 42 transitions, 89 flow [2022-07-22 21:20:13,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 42 transitions, 89 flow [2022-07-22 21:20:13,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:20:13,568 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69978f20, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@469ebd9b [2022-07-22 21:20:13,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:20:13,579 INFO L129 PetriNetUnfolder]: 2/47 cut-off events. [2022-07-22 21:20:13,579 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:20:13,579 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:13,580 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:13,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:20:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:13,585 INFO L85 PathProgramCache]: Analyzing trace with hash -717287360, now seen corresponding path program 1 times [2022-07-22 21:20:13,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:13,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548962250] [2022-07-22 21:20:13,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:13,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:20:13,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:13,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548962250] [2022-07-22 21:20:13,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548962250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:13,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:13,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:20:13,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027541081] [2022-07-22 21:20:13,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:13,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:13,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:13,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:13,845 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 42 [2022-07-22 21:20:13,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:13,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:13,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 42 [2022-07-22 21:20:13,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:13,900 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2022-07-22 21:20:13,902 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:20:13,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 38 events. 0/38 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 6/44 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-22 21:20:13,903 INFO L132 encePairwiseOnDemand]: 38/42 looper letters, 6 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2022-07-22 21:20:13,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 87 flow [2022-07-22 21:20:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:20:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:20:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2022-07-22 21:20:13,913 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2022-07-22 21:20:13,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2022-07-22 21:20:13,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2022-07-22 21:20:13,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:13,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2022-07-22 21:20:13,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:13,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:13,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:13,925 INFO L186 Difference]: Start difference. First operand has 44 places, 42 transitions, 89 flow. Second operand 3 states and 108 transitions. [2022-07-22 21:20:13,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 87 flow [2022-07-22 21:20:13,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 87 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:13,929 INFO L242 Difference]: Finished difference. Result has 39 places, 34 transitions, 75 flow [2022-07-22 21:20:13,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2022-07-22 21:20:13,933 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2022-07-22 21:20:13,933 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 75 flow [2022-07-22 21:20:13,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:13,933 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:13,933 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:13,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:20:13,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:20:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash 527068737, now seen corresponding path program 1 times [2022-07-22 21:20:13,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:13,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023645169] [2022-07-22 21:20:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:13,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:20:13,962 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:20:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:20:13,992 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:20:13,993 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:20:13,994 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-22 21:20:13,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-22 21:20:13,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-22 21:20:13,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:20:13,997 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:20:13,999 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:20:13,999 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:20:14,011 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:20:14,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 57 places, 53 transitions, 118 flow [2022-07-22 21:20:14,025 INFO L129 PetriNetUnfolder]: 3/77 cut-off events. [2022-07-22 21:20:14,025 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:20:14,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 3/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 54. Up to 6 conditions per place. [2022-07-22 21:20:14,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 53 transitions, 118 flow [2022-07-22 21:20:14,027 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 118 flow [2022-07-22 21:20:14,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:20:14,030 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69978f20, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@469ebd9b [2022-07-22 21:20:14,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:20:14,041 INFO L129 PetriNetUnfolder]: 2/48 cut-off events. [2022-07-22 21:20:14,042 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:20:14,042 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:14,043 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:14,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:20:14,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash -297621323, now seen corresponding path program 1 times [2022-07-22 21:20:14,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:14,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26751790] [2022-07-22 21:20:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:14,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:20:14,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:14,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26751790] [2022-07-22 21:20:14,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26751790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:14,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:14,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:20:14,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522533232] [2022-07-22 21:20:14,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:14,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:14,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:14,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:14,090 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 53 [2022-07-22 21:20:14,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:14,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 53 [2022-07-22 21:20:14,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:14,148 INFO L129 PetriNetUnfolder]: 19/117 cut-off events. [2022-07-22 21:20:14,151 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-22 21:20:14,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 117 events. 19/117 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 348 event pairs, 10 based on Foata normal form. 35/137 useless extension candidates. Maximal degree in co-relation 119. Up to 37 conditions per place. [2022-07-22 21:20:14,154 INFO L132 encePairwiseOnDemand]: 47/53 looper letters, 14 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2022-07-22 21:20:14,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 153 flow [2022-07-22 21:20:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:20:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:20:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2022-07-22 21:20:14,160 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8742138364779874 [2022-07-22 21:20:14,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2022-07-22 21:20:14,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2022-07-22 21:20:14,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:14,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2022-07-22 21:20:14,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,166 INFO L186 Difference]: Start difference. First operand has 57 places, 53 transitions, 118 flow. Second operand 3 states and 139 transitions. [2022-07-22 21:20:14,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 153 flow [2022-07-22 21:20:14,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 151 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:14,171 INFO L242 Difference]: Finished difference. Result has 55 places, 48 transitions, 124 flow [2022-07-22 21:20:14,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2022-07-22 21:20:14,174 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-07-22 21:20:14,174 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 124 flow [2022-07-22 21:20:14,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,175 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:14,175 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:14,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:20:14,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:20:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:14,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1916139092, now seen corresponding path program 1 times [2022-07-22 21:20:14,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:14,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037647850] [2022-07-22 21:20:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:14,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:20:14,229 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:20:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:20:14,263 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:20:14,267 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:20:14,268 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-22 21:20:14,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-22 21:20:14,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-22 21:20:14,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-22 21:20:14,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:20:14,270 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:20:14,270 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:20:14,271 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:20:14,296 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:20:14,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2022-07-22 21:20:14,325 INFO L129 PetriNetUnfolder]: 4/101 cut-off events. [2022-07-22 21:20:14,329 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:20:14,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 101 events. 4/101 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2022-07-22 21:20:14,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 64 transitions, 149 flow [2022-07-22 21:20:14,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 64 transitions, 149 flow [2022-07-22 21:20:14,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:20:14,337 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69978f20, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@469ebd9b [2022-07-22 21:20:14,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:20:14,349 INFO L129 PetriNetUnfolder]: 2/49 cut-off events. [2022-07-22 21:20:14,349 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:20:14,350 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:14,350 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:14,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:20:14,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash 833747371, now seen corresponding path program 1 times [2022-07-22 21:20:14,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:14,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015523542] [2022-07-22 21:20:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:20:14,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:14,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015523542] [2022-07-22 21:20:14,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015523542] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:14,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:14,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:20:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540003797] [2022-07-22 21:20:14,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:14,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:14,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:14,394 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 64 [2022-07-22 21:20:14,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:14,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 64 [2022-07-22 21:20:14,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:14,508 INFO L129 PetriNetUnfolder]: 203/539 cut-off events. [2022-07-22 21:20:14,508 INFO L130 PetriNetUnfolder]: For 193/193 co-relation queries the response was YES. [2022-07-22 21:20:14,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 539 events. 203/539 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3188 event pairs, 124 based on Foata normal form. 160/601 useless extension candidates. Maximal degree in co-relation 680. Up to 259 conditions per place. [2022-07-22 21:20:14,517 INFO L132 encePairwiseOnDemand]: 57/64 looper letters, 21 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2022-07-22 21:20:14,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 215 flow [2022-07-22 21:20:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:20:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:20:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2022-07-22 21:20:14,523 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.875 [2022-07-22 21:20:14,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2022-07-22 21:20:14,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2022-07-22 21:20:14,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:14,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2022-07-22 21:20:14,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,533 INFO L186 Difference]: Start difference. First operand has 70 places, 64 transitions, 149 flow. Second operand 3 states and 168 transitions. [2022-07-22 21:20:14,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 215 flow [2022-07-22 21:20:14,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 207 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:14,536 INFO L242 Difference]: Finished difference. Result has 68 places, 60 transitions, 159 flow [2022-07-22 21:20:14,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2022-07-22 21:20:14,543 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, -2 predicate places. [2022-07-22 21:20:14,543 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 159 flow [2022-07-22 21:20:14,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,544 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:14,544 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:14,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:20:14,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:20:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:14,545 INFO L85 PathProgramCache]: Analyzing trace with hash 681039901, now seen corresponding path program 1 times [2022-07-22 21:20:14,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:14,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009709427] [2022-07-22 21:20:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:20:14,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:14,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009709427] [2022-07-22 21:20:14,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009709427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:14,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:14,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:20:14,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766700528] [2022-07-22 21:20:14,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:14,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:14,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:14,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:14,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:14,614 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 64 [2022-07-22 21:20:14,614 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:14,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 64 [2022-07-22 21:20:14,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:14,738 INFO L129 PetriNetUnfolder]: 222/629 cut-off events. [2022-07-22 21:20:14,738 INFO L130 PetriNetUnfolder]: For 339/339 co-relation queries the response was YES. [2022-07-22 21:20:14,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 629 events. 222/629 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3959 event pairs, 113 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 1347. Up to 292 conditions per place. [2022-07-22 21:20:14,747 INFO L132 encePairwiseOnDemand]: 59/64 looper letters, 23 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2022-07-22 21:20:14,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 260 flow [2022-07-22 21:20:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:20:14,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:20:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2022-07-22 21:20:14,749 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8489583333333334 [2022-07-22 21:20:14,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2022-07-22 21:20:14,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2022-07-22 21:20:14,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:14,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2022-07-22 21:20:14,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,752 INFO L186 Difference]: Start difference. First operand has 68 places, 60 transitions, 159 flow. Second operand 3 states and 163 transitions. [2022-07-22 21:20:14,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 260 flow [2022-07-22 21:20:14,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 70 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:20:14,759 INFO L242 Difference]: Finished difference. Result has 70 places, 64 transitions, 199 flow [2022-07-22 21:20:14,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2022-07-22 21:20:14,762 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2022-07-22 21:20:14,762 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 199 flow [2022-07-22 21:20:14,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,763 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:14,763 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:14,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:20:14,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:20:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash -932714154, now seen corresponding path program 1 times [2022-07-22 21:20:14,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:14,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808950201] [2022-07-22 21:20:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:14,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:20:14,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808950201] [2022-07-22 21:20:14,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808950201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:14,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:14,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:14,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759562831] [2022-07-22 21:20:14,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:14,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:20:14,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:14,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:20:14,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:20:14,866 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 64 [2022-07-22 21:20:14,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:14,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 64 [2022-07-22 21:20:14,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:15,129 INFO L129 PetriNetUnfolder]: 464/1205 cut-off events. [2022-07-22 21:20:15,130 INFO L130 PetriNetUnfolder]: For 794/794 co-relation queries the response was YES. [2022-07-22 21:20:15,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3084 conditions, 1205 events. 464/1205 cut-off events. For 794/794 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8708 event pairs, 91 based on Foata normal form. 10/1068 useless extension candidates. Maximal degree in co-relation 3004. Up to 282 conditions per place. [2022-07-22 21:20:15,145 INFO L132 encePairwiseOnDemand]: 55/64 looper letters, 50 selfloop transitions, 23 changer transitions 0/112 dead transitions. [2022-07-22 21:20:15,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 573 flow [2022-07-22 21:20:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:20:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:20:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 371 transitions. [2022-07-22 21:20:15,147 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.828125 [2022-07-22 21:20:15,147 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 371 transitions. [2022-07-22 21:20:15,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 371 transitions. [2022-07-22 21:20:15,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:15,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 371 transitions. [2022-07-22 21:20:15,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,151 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,151 INFO L186 Difference]: Start difference. First operand has 70 places, 64 transitions, 199 flow. Second operand 7 states and 371 transitions. [2022-07-22 21:20:15,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 573 flow [2022-07-22 21:20:15,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 112 transitions, 541 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:20:15,161 INFO L242 Difference]: Finished difference. Result has 78 places, 83 transitions, 387 flow [2022-07-22 21:20:15,162 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2022-07-22 21:20:15,163 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2022-07-22 21:20:15,164 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 387 flow [2022-07-22 21:20:15,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,167 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:15,167 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:15,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:20:15,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:20:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:15,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1486133546, now seen corresponding path program 2 times [2022-07-22 21:20:15,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:15,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132877109] [2022-07-22 21:20:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:15,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:20:15,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:15,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132877109] [2022-07-22 21:20:15,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132877109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:15,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:15,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:15,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007617969] [2022-07-22 21:20:15,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:15,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:20:15,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:15,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:20:15,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:20:15,218 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 64 [2022-07-22 21:20:15,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:15,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 64 [2022-07-22 21:20:15,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:15,443 INFO L129 PetriNetUnfolder]: 441/1220 cut-off events. [2022-07-22 21:20:15,443 INFO L130 PetriNetUnfolder]: For 1541/1541 co-relation queries the response was YES. [2022-07-22 21:20:15,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3624 conditions, 1220 events. 441/1220 cut-off events. For 1541/1541 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9189 event pairs, 114 based on Foata normal form. 20/1129 useless extension candidates. Maximal degree in co-relation 3538. Up to 241 conditions per place. [2022-07-22 21:20:15,458 INFO L132 encePairwiseOnDemand]: 55/64 looper letters, 52 selfloop transitions, 26 changer transitions 0/117 dead transitions. [2022-07-22 21:20:15,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 117 transitions, 734 flow [2022-07-22 21:20:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:20:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:20:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 322 transitions. [2022-07-22 21:20:15,459 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8385416666666666 [2022-07-22 21:20:15,460 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 322 transitions. [2022-07-22 21:20:15,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 322 transitions. [2022-07-22 21:20:15,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:15,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 322 transitions. [2022-07-22 21:20:15,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,462 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,462 INFO L186 Difference]: Start difference. First operand has 78 places, 83 transitions, 387 flow. Second operand 6 states and 322 transitions. [2022-07-22 21:20:15,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 117 transitions, 734 flow [2022-07-22 21:20:15,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 732 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:15,469 INFO L242 Difference]: Finished difference. Result has 87 places, 92 transitions, 574 flow [2022-07-22 21:20:15,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=574, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2022-07-22 21:20:15,470 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 17 predicate places. [2022-07-22 21:20:15,470 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 574 flow [2022-07-22 21:20:15,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,471 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:15,471 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:15,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:20:15,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:20:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash -468720811, now seen corresponding path program 1 times [2022-07-22 21:20:15,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:15,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591273088] [2022-07-22 21:20:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:15,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:20:15,486 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:20:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:20:15,500 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:20:15,500 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:20:15,500 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-22 21:20:15,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:20:15,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-22 21:20:15,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:20:15,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:20:15,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:20:15,501 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-07-22 21:20:15,502 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:20:15,502 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:20:15,516 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:20:15,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 182 flow [2022-07-22 21:20:15,525 INFO L129 PetriNetUnfolder]: 5/125 cut-off events. [2022-07-22 21:20:15,525 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:20:15,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 125 events. 5/125 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 109. Up to 10 conditions per place. [2022-07-22 21:20:15,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 75 transitions, 182 flow [2022-07-22 21:20:15,527 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 75 transitions, 182 flow [2022-07-22 21:20:15,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:20:15,528 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69978f20, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@469ebd9b [2022-07-22 21:20:15,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:20:15,531 INFO L129 PetriNetUnfolder]: 2/46 cut-off events. [2022-07-22 21:20:15,531 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:20:15,531 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:15,531 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:15,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:20:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:15,532 INFO L85 PathProgramCache]: Analyzing trace with hash -456275018, now seen corresponding path program 1 times [2022-07-22 21:20:15,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:15,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895249317] [2022-07-22 21:20:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:15,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:20:15,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:15,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895249317] [2022-07-22 21:20:15,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895249317] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:15,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:15,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:20:15,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629634116] [2022-07-22 21:20:15,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:15,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:15,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:15,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:15,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:15,554 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 75 [2022-07-22 21:20:15,555 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:15,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 75 [2022-07-22 21:20:15,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:15,845 INFO L129 PetriNetUnfolder]: 1344/2642 cut-off events. [2022-07-22 21:20:15,846 INFO L130 PetriNetUnfolder]: For 1446/1446 co-relation queries the response was YES. [2022-07-22 21:20:15,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5424 conditions, 2642 events. 1344/2642 cut-off events. For 1446/1446 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19123 event pairs, 870 based on Foata normal form. 669/2762 useless extension candidates. Maximal degree in co-relation 3515. Up to 1494 conditions per place. [2022-07-22 21:20:15,880 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 28 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2022-07-22 21:20:15,880 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 281 flow [2022-07-22 21:20:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:20:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:20:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2022-07-22 21:20:15,882 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8755555555555555 [2022-07-22 21:20:15,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2022-07-22 21:20:15,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2022-07-22 21:20:15,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:15,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2022-07-22 21:20:15,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2022-07-22 21:20:15,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,886 INFO L186 Difference]: Start difference. First operand has 83 places, 75 transitions, 182 flow. Second operand 3 states and 197 transitions. [2022-07-22 21:20:15,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 281 flow [2022-07-22 21:20:15,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 263 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:15,891 INFO L242 Difference]: Finished difference. Result has 81 places, 72 transitions, 194 flow [2022-07-22 21:20:15,891 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2022-07-22 21:20:15,892 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, -2 predicate places. [2022-07-22 21:20:15,892 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 194 flow [2022-07-22 21:20:15,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,893 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:15,893 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:15,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:20:15,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:20:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:15,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1917209497, now seen corresponding path program 1 times [2022-07-22 21:20:15,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:15,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108728640] [2022-07-22 21:20:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:15,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:20:15,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:15,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108728640] [2022-07-22 21:20:15,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108728640] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:15,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:15,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:20:15,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495069260] [2022-07-22 21:20:15,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:15,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:15,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:15,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:15,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:15,953 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 75 [2022-07-22 21:20:15,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:15,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:15,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 75 [2022-07-22 21:20:15,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:16,360 INFO L129 PetriNetUnfolder]: 1768/3569 cut-off events. [2022-07-22 21:20:16,361 INFO L130 PetriNetUnfolder]: For 2165/2165 co-relation queries the response was YES. [2022-07-22 21:20:16,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8437 conditions, 3569 events. 1768/3569 cut-off events. For 2165/2165 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27703 event pairs, 936 based on Foata normal form. 0/3024 useless extension candidates. Maximal degree in co-relation 8372. Up to 2004 conditions per place. [2022-07-22 21:20:16,417 INFO L132 encePairwiseOnDemand]: 69/75 looper letters, 31 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2022-07-22 21:20:16,418 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 87 transitions, 336 flow [2022-07-22 21:20:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:20:16,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:20:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2022-07-22 21:20:16,420 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8533333333333334 [2022-07-22 21:20:16,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2022-07-22 21:20:16,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2022-07-22 21:20:16,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:16,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2022-07-22 21:20:16,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:16,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:16,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:16,422 INFO L186 Difference]: Start difference. First operand has 81 places, 72 transitions, 194 flow. Second operand 3 states and 192 transitions. [2022-07-22 21:20:16,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 87 transitions, 336 flow [2022-07-22 21:20:16,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:20:16,431 INFO L242 Difference]: Finished difference. Result has 83 places, 78 transitions, 252 flow [2022-07-22 21:20:16,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2022-07-22 21:20:16,433 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 0 predicate places. [2022-07-22 21:20:16,433 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 252 flow [2022-07-22 21:20:16,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:16,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:16,433 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:16,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:20:16,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:20:16,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash -870085120, now seen corresponding path program 1 times [2022-07-22 21:20:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:16,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468585231] [2022-07-22 21:20:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:16,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:20:16,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:16,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468585231] [2022-07-22 21:20:16,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468585231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:16,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:16,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:16,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598696754] [2022-07-22 21:20:16,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:16,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:20:16,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:16,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:20:16,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:20:16,537 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-07-22 21:20:16,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:16,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:16,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-07-22 21:20:16,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:17,373 INFO L129 PetriNetUnfolder]: 3702/7308 cut-off events. [2022-07-22 21:20:17,374 INFO L130 PetriNetUnfolder]: For 5960/7310 co-relation queries the response was YES. [2022-07-22 21:20:17,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19270 conditions, 7308 events. 3702/7308 cut-off events. For 5960/7310 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 61789 event pairs, 920 based on Foata normal form. 76/6186 useless extension candidates. Maximal degree in co-relation 19189. Up to 1986 conditions per place. [2022-07-22 21:20:17,501 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 73 selfloop transitions, 29 changer transitions 0/148 dead transitions. [2022-07-22 21:20:17,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 148 transitions, 787 flow [2022-07-22 21:20:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:20:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:20:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 444 transitions. [2022-07-22 21:20:17,503 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8457142857142858 [2022-07-22 21:20:17,504 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 444 transitions. [2022-07-22 21:20:17,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 444 transitions. [2022-07-22 21:20:17,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:17,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 444 transitions. [2022-07-22 21:20:17,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.42857142857143) internal successors, (444), 7 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:17,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:17,507 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:17,507 INFO L186 Difference]: Start difference. First operand has 83 places, 78 transitions, 252 flow. Second operand 7 states and 444 transitions. [2022-07-22 21:20:17,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 148 transitions, 787 flow [2022-07-22 21:20:17,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 148 transitions, 745 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:20:17,523 INFO L242 Difference]: Finished difference. Result has 91 places, 101 transitions, 484 flow [2022-07-22 21:20:17,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=484, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2022-07-22 21:20:17,524 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 8 predicate places. [2022-07-22 21:20:17,524 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 484 flow [2022-07-22 21:20:17,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:17,525 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:17,525 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:17,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:20:17,526 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:20:17,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:17,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1324378714, now seen corresponding path program 2 times [2022-07-22 21:20:17,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:17,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778198574] [2022-07-22 21:20:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:17,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:20:17,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:17,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778198574] [2022-07-22 21:20:17,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778198574] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:17,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:17,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:17,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130161690] [2022-07-22 21:20:17,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:17,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:20:17,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:17,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:20:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:20:17,576 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-07-22 21:20:17,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 484 flow. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:17,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:17,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-07-22 21:20:17,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:18,490 INFO L129 PetriNetUnfolder]: 3687/7430 cut-off events. [2022-07-22 21:20:18,490 INFO L130 PetriNetUnfolder]: For 10210/10252 co-relation queries the response was YES. [2022-07-22 21:20:18,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 7430 events. 3687/7430 cut-off events. For 10210/10252 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 64618 event pairs, 894 based on Foata normal form. 90/6553 useless extension candidates. Maximal degree in co-relation 12426. Up to 1800 conditions per place. [2022-07-22 21:20:18,598 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 73 selfloop transitions, 35 changer transitions 0/154 dead transitions. [2022-07-22 21:20:18,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 154 transitions, 993 flow [2022-07-22 21:20:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:20:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:20:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 384 transitions. [2022-07-22 21:20:18,600 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8533333333333334 [2022-07-22 21:20:18,600 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 384 transitions. [2022-07-22 21:20:18,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 384 transitions. [2022-07-22 21:20:18,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:18,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 384 transitions. [2022-07-22 21:20:18,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:18,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:18,603 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:18,603 INFO L186 Difference]: Start difference. First operand has 91 places, 101 transitions, 484 flow. Second operand 6 states and 384 transitions. [2022-07-22 21:20:18,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 154 transitions, 993 flow [2022-07-22 21:20:18,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 154 transitions, 989 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:18,632 INFO L242 Difference]: Finished difference. Result has 100 places, 114 transitions, 745 flow [2022-07-22 21:20:18,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=745, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2022-07-22 21:20:18,634 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 17 predicate places. [2022-07-22 21:20:18,634 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 745 flow [2022-07-22 21:20:18,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:18,634 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:18,634 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:18,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:20:18,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:20:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:18,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1405795873, now seen corresponding path program 1 times [2022-07-22 21:20:18,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:18,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083394586] [2022-07-22 21:20:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:18,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 21:20:18,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:18,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083394586] [2022-07-22 21:20:18,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083394586] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:18,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:18,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:20:18,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203712512] [2022-07-22 21:20:18,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:18,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:18,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:18,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:18,675 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 75 [2022-07-22 21:20:18,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 745 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:18,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:18,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 75 [2022-07-22 21:20:18,675 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:19,828 INFO L129 PetriNetUnfolder]: 4582/9914 cut-off events. [2022-07-22 21:20:19,829 INFO L130 PetriNetUnfolder]: For 32085/32829 co-relation queries the response was YES. [2022-07-22 21:20:19,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34614 conditions, 9914 events. 4582/9914 cut-off events. For 32085/32829 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 97835 event pairs, 1950 based on Foata normal form. 96/8902 useless extension candidates. Maximal degree in co-relation 34536. Up to 5307 conditions per place. [2022-07-22 21:20:19,987 INFO L132 encePairwiseOnDemand]: 69/75 looper letters, 72 selfloop transitions, 34 changer transitions 0/157 dead transitions. [2022-07-22 21:20:19,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 157 transitions, 1392 flow [2022-07-22 21:20:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:20:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:20:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2022-07-22 21:20:19,989 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8488888888888889 [2022-07-22 21:20:19,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 191 transitions. [2022-07-22 21:20:19,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 191 transitions. [2022-07-22 21:20:19,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:19,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 191 transitions. [2022-07-22 21:20:19,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:19,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:19,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:19,991 INFO L186 Difference]: Start difference. First operand has 100 places, 114 transitions, 745 flow. Second operand 3 states and 191 transitions. [2022-07-22 21:20:19,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 157 transitions, 1392 flow [2022-07-22 21:20:20,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 157 transitions, 1368 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:20,079 INFO L242 Difference]: Finished difference. Result has 104 places, 136 transitions, 1163 flow [2022-07-22 21:20:20,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1163, PETRI_PLACES=104, PETRI_TRANSITIONS=136} [2022-07-22 21:20:20,080 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 21 predicate places. [2022-07-22 21:20:20,080 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 136 transitions, 1163 flow [2022-07-22 21:20:20,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:20,080 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:20,080 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:20,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:20:20,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:20:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash -399567784, now seen corresponding path program 1 times [2022-07-22 21:20:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:20,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43640782] [2022-07-22 21:20:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 21:20:20,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:20,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43640782] [2022-07-22 21:20:20,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43640782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:20,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:20,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481839055] [2022-07-22 21:20:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:20,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:20:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:20:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:20:20,115 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-07-22 21:20:20,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 136 transitions, 1163 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:20,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:20,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-07-22 21:20:20,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:22,139 INFO L129 PetriNetUnfolder]: 7882/17707 cut-off events. [2022-07-22 21:20:22,140 INFO L130 PetriNetUnfolder]: For 78129/130534 co-relation queries the response was YES. [2022-07-22 21:20:22,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66790 conditions, 17707 events. 7882/17707 cut-off events. For 78129/130534 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 192392 event pairs, 1768 based on Foata normal form. 698/16886 useless extension candidates. Maximal degree in co-relation 66692. Up to 4126 conditions per place. [2022-07-22 21:20:22,362 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 133 selfloop transitions, 113 changer transitions 0/294 dead transitions. [2022-07-22 21:20:22,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 294 transitions, 3422 flow [2022-07-22 21:20:22,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:20:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:20:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 438 transitions. [2022-07-22 21:20:22,364 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8342857142857143 [2022-07-22 21:20:22,364 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 438 transitions. [2022-07-22 21:20:22,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 438 transitions. [2022-07-22 21:20:22,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:22,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 438 transitions. [2022-07-22 21:20:22,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.57142857142857) internal successors, (438), 7 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:22,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:22,369 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:22,369 INFO L186 Difference]: Start difference. First operand has 104 places, 136 transitions, 1163 flow. Second operand 7 states and 438 transitions. [2022-07-22 21:20:22,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 294 transitions, 3422 flow [2022-07-22 21:20:22,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 294 transitions, 3266 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:20:22,613 INFO L242 Difference]: Finished difference. Result has 112 places, 225 transitions, 2725 flow [2022-07-22 21:20:22,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2725, PETRI_PLACES=112, PETRI_TRANSITIONS=225} [2022-07-22 21:20:22,614 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 29 predicate places. [2022-07-22 21:20:22,615 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 225 transitions, 2725 flow [2022-07-22 21:20:22,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:22,615 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:22,615 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:22,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:20:22,615 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:20:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash -186041482, now seen corresponding path program 2 times [2022-07-22 21:20:22,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:22,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941430350] [2022-07-22 21:20:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:22,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 21:20:22,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:22,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941430350] [2022-07-22 21:20:22,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941430350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:22,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:22,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:22,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147317089] [2022-07-22 21:20:22,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:22,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:20:22,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:22,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:20:22,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:20:22,671 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-07-22 21:20:22,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 225 transitions, 2725 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:22,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:22,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-07-22 21:20:22,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:24,815 INFO L129 PetriNetUnfolder]: 7684/17574 cut-off events. [2022-07-22 21:20:24,815 INFO L130 PetriNetUnfolder]: For 88913/92449 co-relation queries the response was YES. [2022-07-22 21:20:24,993 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73900 conditions, 17574 events. 7684/17574 cut-off events. For 88913/92449 co-relation queries the response was YES. Maximal size of possible extension queue 1239. Compared 193992 event pairs, 1575 based on Foata normal form. 370/16558 useless extension candidates. Maximal degree in co-relation 73796. Up to 4041 conditions per place. [2022-07-22 21:20:25,115 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 122 selfloop transitions, 140 changer transitions 0/310 dead transitions. [2022-07-22 21:20:25,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 310 transitions, 4160 flow [2022-07-22 21:20:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:20:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:20:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 381 transitions. [2022-07-22 21:20:25,117 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8466666666666667 [2022-07-22 21:20:25,117 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 381 transitions. [2022-07-22 21:20:25,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 381 transitions. [2022-07-22 21:20:25,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:25,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 381 transitions. [2022-07-22 21:20:25,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:25,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:25,120 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:25,120 INFO L186 Difference]: Start difference. First operand has 112 places, 225 transitions, 2725 flow. Second operand 6 states and 381 transitions. [2022-07-22 21:20:25,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 310 transitions, 4160 flow [2022-07-22 21:20:25,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 310 transitions, 4144 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:25,543 INFO L242 Difference]: Finished difference. Result has 121 places, 261 transitions, 3846 flow [2022-07-22 21:20:25,544 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3846, PETRI_PLACES=121, PETRI_TRANSITIONS=261} [2022-07-22 21:20:25,544 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 38 predicate places. [2022-07-22 21:20:25,545 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 261 transitions, 3846 flow [2022-07-22 21:20:25,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:25,545 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:25,545 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:25,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:20:25,546 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:20:25,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash 429602850, now seen corresponding path program 1 times [2022-07-22 21:20:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:25,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703070396] [2022-07-22 21:20:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:25,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 21:20:25,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:25,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703070396] [2022-07-22 21:20:25,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703070396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:25,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:25,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:25,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828723157] [2022-07-22 21:20:25,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:25,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:20:25,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:25,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:20:25,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:20:25,619 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-07-22 21:20:25,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 261 transitions, 3846 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:25,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:25,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-07-22 21:20:25,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:29,570 INFO L129 PetriNetUnfolder]: 11080/25867 cut-off events. [2022-07-22 21:20:29,570 INFO L130 PetriNetUnfolder]: For 175846/176115 co-relation queries the response was YES. [2022-07-22 21:20:29,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121436 conditions, 25867 events. 11080/25867 cut-off events. For 175846/176115 co-relation queries the response was YES. Maximal size of possible extension queue 1969. Compared 307095 event pairs, 1849 based on Foata normal form. 236/24162 useless extension candidates. Maximal degree in co-relation 121343. Up to 6382 conditions per place. [2022-07-22 21:20:29,944 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 227 selfloop transitions, 195 changer transitions 0/471 dead transitions. [2022-07-22 21:20:29,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 471 transitions, 7720 flow [2022-07-22 21:20:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:20:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:20:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 436 transitions. [2022-07-22 21:20:29,946 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8304761904761905 [2022-07-22 21:20:29,946 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 436 transitions. [2022-07-22 21:20:29,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 436 transitions. [2022-07-22 21:20:29,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:29,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 436 transitions. [2022-07-22 21:20:29,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:29,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:29,949 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:29,949 INFO L186 Difference]: Start difference. First operand has 121 places, 261 transitions, 3846 flow. Second operand 7 states and 436 transitions. [2022-07-22 21:20:29,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 471 transitions, 7720 flow [2022-07-22 21:20:31,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 471 transitions, 7656 flow, removed 32 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:31,229 INFO L242 Difference]: Finished difference. Result has 131 places, 388 transitions, 6700 flow [2022-07-22 21:20:31,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3820, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6700, PETRI_PLACES=131, PETRI_TRANSITIONS=388} [2022-07-22 21:20:31,230 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 48 predicate places. [2022-07-22 21:20:31,230 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 388 transitions, 6700 flow [2022-07-22 21:20:31,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:31,230 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:31,231 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:31,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:20:31,231 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:20:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash -21483038, now seen corresponding path program 2 times [2022-07-22 21:20:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:31,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287896873] [2022-07-22 21:20:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:31,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 21:20:31,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:31,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287896873] [2022-07-22 21:20:31,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287896873] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:31,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:31,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:31,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117849212] [2022-07-22 21:20:31,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:31,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:20:31,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:31,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:20:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:20:31,286 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-07-22 21:20:31,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 388 transitions, 6700 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:31,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:31,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-07-22 21:20:31,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:35,134 INFO L129 PetriNetUnfolder]: 10904/26440 cut-off events. [2022-07-22 21:20:35,134 INFO L130 PetriNetUnfolder]: For 223226/223305 co-relation queries the response was YES. [2022-07-22 21:20:35,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135081 conditions, 26440 events. 10904/26440 cut-off events. For 223226/223305 co-relation queries the response was YES. Maximal size of possible extension queue 2149. Compared 323414 event pairs, 2117 based on Foata normal form. 236/24630 useless extension candidates. Maximal degree in co-relation 134983. Up to 5758 conditions per place. [2022-07-22 21:20:35,600 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 241 selfloop transitions, 225 changer transitions 0/515 dead transitions. [2022-07-22 21:20:35,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 515 transitions, 9548 flow [2022-07-22 21:20:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:20:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:20:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 378 transitions. [2022-07-22 21:20:35,602 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.84 [2022-07-22 21:20:35,602 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 378 transitions. [2022-07-22 21:20:35,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 378 transitions. [2022-07-22 21:20:35,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:35,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 378 transitions. [2022-07-22 21:20:35,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.0) internal successors, (378), 6 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:35,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:35,605 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:35,605 INFO L186 Difference]: Start difference. First operand has 131 places, 388 transitions, 6700 flow. Second operand 6 states and 378 transitions. [2022-07-22 21:20:35,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 515 transitions, 9548 flow [2022-07-22 21:20:36,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 515 transitions, 9536 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:36,961 INFO L242 Difference]: Finished difference. Result has 140 places, 447 transitions, 8716 flow [2022-07-22 21:20:36,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8716, PETRI_PLACES=140, PETRI_TRANSITIONS=447} [2022-07-22 21:20:36,962 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 57 predicate places. [2022-07-22 21:20:36,962 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 447 transitions, 8716 flow [2022-07-22 21:20:36,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:36,963 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:36,963 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:36,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 21:20:36,963 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:20:36,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash -791742585, now seen corresponding path program 1 times [2022-07-22 21:20:36,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:36,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175114721] [2022-07-22 21:20:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:20:36,985 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:20:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:20:36,998 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:20:36,998 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:20:36,998 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-22 21:20:36,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-22 21:20:36,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-22 21:20:36,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:20:36,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:20:36,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:20:36,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 21:20:36,999 INFO L356 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1] [2022-07-22 21:20:37,000 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:20:37,000 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:20:37,014 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:20:37,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 86 transitions, 217 flow [2022-07-22 21:20:37,027 INFO L129 PetriNetUnfolder]: 6/149 cut-off events. [2022-07-22 21:20:37,028 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:20:37,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 149 events. 6/149 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 264 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 138. Up to 12 conditions per place. [2022-07-22 21:20:37,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 86 transitions, 217 flow [2022-07-22 21:20:37,030 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 86 transitions, 217 flow [2022-07-22 21:20:37,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:20:37,032 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69978f20, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@469ebd9b [2022-07-22 21:20:37,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:20:37,034 INFO L129 PetriNetUnfolder]: 2/47 cut-off events. [2022-07-22 21:20:37,034 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:20:37,034 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:37,034 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:37,034 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:20:37,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:37,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1615531528, now seen corresponding path program 1 times [2022-07-22 21:20:37,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:37,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237342099] [2022-07-22 21:20:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:37,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:20:37,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:37,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237342099] [2022-07-22 21:20:37,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237342099] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:37,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:37,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:20:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303565252] [2022-07-22 21:20:37,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:37,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:37,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:37,058 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 86 [2022-07-22 21:20:37,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:37,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:37,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 86 [2022-07-22 21:20:37,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:38,051 INFO L129 PetriNetUnfolder]: 7474/12642 cut-off events. [2022-07-22 21:20:38,051 INFO L130 PetriNetUnfolder]: For 9085/9085 co-relation queries the response was YES. [2022-07-22 21:20:38,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26655 conditions, 12642 events. 7474/12642 cut-off events. For 9085/9085 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 101084 event pairs, 5008 based on Foata normal form. 2714/12500 useless extension candidates. Maximal degree in co-relation 17174. Up to 7750 conditions per place. [2022-07-22 21:20:38,161 INFO L132 encePairwiseOnDemand]: 77/86 looper letters, 35 selfloop transitions, 6 changer transitions 0/96 dead transitions. [2022-07-22 21:20:38,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 96 transitions, 351 flow [2022-07-22 21:20:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:20:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:20:38,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2022-07-22 21:20:38,163 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.875968992248062 [2022-07-22 21:20:38,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2022-07-22 21:20:38,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2022-07-22 21:20:38,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:38,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2022-07-22 21:20:38,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:38,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:38,164 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:38,165 INFO L186 Difference]: Start difference. First operand has 96 places, 86 transitions, 217 flow. Second operand 3 states and 226 transitions. [2022-07-22 21:20:38,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 96 transitions, 351 flow [2022-07-22 21:20:38,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 96 transitions, 319 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:38,167 INFO L242 Difference]: Finished difference. Result has 94 places, 84 transitions, 229 flow [2022-07-22 21:20:38,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=94, PETRI_TRANSITIONS=84} [2022-07-22 21:20:38,168 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -2 predicate places. [2022-07-22 21:20:38,168 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 84 transitions, 229 flow [2022-07-22 21:20:38,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:38,169 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:38,169 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:38,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:20:38,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:20:38,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:38,170 INFO L85 PathProgramCache]: Analyzing trace with hash -275840951, now seen corresponding path program 1 times [2022-07-22 21:20:38,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:38,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7064815] [2022-07-22 21:20:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:38,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:20:38,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:38,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7064815] [2022-07-22 21:20:38,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7064815] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:38,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:38,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:20:38,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124016105] [2022-07-22 21:20:38,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:38,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:38,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:38,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:38,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:38,195 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 86 [2022-07-22 21:20:38,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 84 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:38,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:38,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 86 [2022-07-22 21:20:38,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:39,566 INFO L129 PetriNetUnfolder]: 10409/18022 cut-off events. [2022-07-22 21:20:39,566 INFO L130 PetriNetUnfolder]: For 11040/11040 co-relation queries the response was YES. [2022-07-22 21:20:39,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43118 conditions, 18022 events. 10409/18022 cut-off events. For 11040/11040 co-relation queries the response was YES. Maximal size of possible extension queue 1055. Compared 154270 event pairs, 5778 based on Foata normal form. 0/14837 useless extension candidates. Maximal degree in co-relation 43052. Up to 10999 conditions per place. [2022-07-22 21:20:39,736 INFO L132 encePairwiseOnDemand]: 79/86 looper letters, 39 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2022-07-22 21:20:39,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 104 transitions, 412 flow [2022-07-22 21:20:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:20:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:20:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2022-07-22 21:20:39,737 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8565891472868217 [2022-07-22 21:20:39,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2022-07-22 21:20:39,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2022-07-22 21:20:39,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:39,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2022-07-22 21:20:39,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:39,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:39,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:39,739 INFO L186 Difference]: Start difference. First operand has 94 places, 84 transitions, 229 flow. Second operand 3 states and 221 transitions. [2022-07-22 21:20:39,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 104 transitions, 412 flow [2022-07-22 21:20:39,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 104 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:20:39,778 INFO L242 Difference]: Finished difference. Result has 96 places, 92 transitions, 305 flow [2022-07-22 21:20:39,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=96, PETRI_TRANSITIONS=92} [2022-07-22 21:20:39,778 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 0 predicate places. [2022-07-22 21:20:39,778 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 92 transitions, 305 flow [2022-07-22 21:20:39,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:39,778 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:39,778 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:39,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 21:20:39,779 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:20:39,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:39,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1502870282, now seen corresponding path program 1 times [2022-07-22 21:20:39,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:39,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752197025] [2022-07-22 21:20:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:39,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:20:39,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:39,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752197025] [2022-07-22 21:20:39,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752197025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:39,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:39,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249208215] [2022-07-22 21:20:39,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:39,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:20:39,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:20:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:20:39,807 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 86 [2022-07-22 21:20:39,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 92 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:39,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:39,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 86 [2022-07-22 21:20:39,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:42,786 INFO L129 PetriNetUnfolder]: 21834/36235 cut-off events. [2022-07-22 21:20:42,786 INFO L130 PetriNetUnfolder]: For 27039/27039 co-relation queries the response was YES. [2022-07-22 21:20:42,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98544 conditions, 36235 events. 21834/36235 cut-off events. For 27039/27039 co-relation queries the response was YES. Maximal size of possible extension queue 1931. Compared 320405 event pairs, 3234 based on Foata normal form. 170/29762 useless extension candidates. Maximal degree in co-relation 98462. Up to 10933 conditions per place. [2022-07-22 21:20:43,157 INFO L132 encePairwiseOnDemand]: 75/86 looper letters, 96 selfloop transitions, 35 changer transitions 0/184 dead transitions. [2022-07-22 21:20:43,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 184 transitions, 1001 flow [2022-07-22 21:20:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:20:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:20:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 517 transitions. [2022-07-22 21:20:43,159 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8588039867109635 [2022-07-22 21:20:43,159 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 517 transitions. [2022-07-22 21:20:43,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 517 transitions. [2022-07-22 21:20:43,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:43,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 517 transitions. [2022-07-22 21:20:43,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.85714285714286) internal successors, (517), 7 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:43,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:43,161 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:43,161 INFO L186 Difference]: Start difference. First operand has 96 places, 92 transitions, 305 flow. Second operand 7 states and 517 transitions. [2022-07-22 21:20:43,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 184 transitions, 1001 flow [2022-07-22 21:20:43,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 184 transitions, 949 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:20:43,365 INFO L242 Difference]: Finished difference. Result has 104 places, 119 transitions, 581 flow [2022-07-22 21:20:43,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=581, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2022-07-22 21:20:43,366 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 8 predicate places. [2022-07-22 21:20:43,366 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 581 flow [2022-07-22 21:20:43,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:43,366 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:43,367 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:43,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 21:20:43,367 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:20:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:43,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1097776560, now seen corresponding path program 2 times [2022-07-22 21:20:43,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:43,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117860150] [2022-07-22 21:20:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:43,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:20:43,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:43,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117860150] [2022-07-22 21:20:43,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117860150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:43,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:43,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:43,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326774048] [2022-07-22 21:20:43,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:43,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:20:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:20:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:20:43,419 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 86 [2022-07-22 21:20:43,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 581 flow. Second operand has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:43,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:43,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 86 [2022-07-22 21:20:43,420 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:46,529 INFO L129 PetriNetUnfolder]: 22143/38290 cut-off events. [2022-07-22 21:20:46,529 INFO L130 PetriNetUnfolder]: For 53115/53199 co-relation queries the response was YES. [2022-07-22 21:20:46,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116105 conditions, 38290 events. 22143/38290 cut-off events. For 53115/53199 co-relation queries the response was YES. Maximal size of possible extension queue 2094. Compared 356946 event pairs, 5832 based on Foata normal form. 349/32666 useless extension candidates. Maximal degree in co-relation 67760. Up to 10158 conditions per place. [2022-07-22 21:20:47,230 INFO L132 encePairwiseOnDemand]: 75/86 looper letters, 94 selfloop transitions, 43 changer transitions 0/190 dead transitions. [2022-07-22 21:20:47,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 190 transitions, 1240 flow [2022-07-22 21:20:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:20:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:20:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 446 transitions. [2022-07-22 21:20:47,232 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8643410852713178 [2022-07-22 21:20:47,232 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 446 transitions. [2022-07-22 21:20:47,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 446 transitions. [2022-07-22 21:20:47,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:47,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 446 transitions. [2022-07-22 21:20:47,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:47,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:47,235 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:47,235 INFO L186 Difference]: Start difference. First operand has 104 places, 119 transitions, 581 flow. Second operand 6 states and 446 transitions. [2022-07-22 21:20:47,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 190 transitions, 1240 flow [2022-07-22 21:20:47,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 190 transitions, 1234 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:47,400 INFO L242 Difference]: Finished difference. Result has 113 places, 135 transitions, 902 flow [2022-07-22 21:20:47,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=902, PETRI_PLACES=113, PETRI_TRANSITIONS=135} [2022-07-22 21:20:47,401 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 17 predicate places. [2022-07-22 21:20:47,401 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 135 transitions, 902 flow [2022-07-22 21:20:47,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:47,401 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:47,401 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:47,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 21:20:47,401 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:20:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:47,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2018012865, now seen corresponding path program 1 times [2022-07-22 21:20:47,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:47,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936265614] [2022-07-22 21:20:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:47,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 21:20:47,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:47,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936265614] [2022-07-22 21:20:47,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936265614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:47,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:47,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:20:47,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389514785] [2022-07-22 21:20:47,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:47,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:47,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:47,427 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 86 [2022-07-22 21:20:47,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 135 transitions, 902 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:47,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:47,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 86 [2022-07-22 21:20:47,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:52,518 INFO L129 PetriNetUnfolder]: 31761/57095 cut-off events. [2022-07-22 21:20:52,518 INFO L130 PetriNetUnfolder]: For 197038/201168 co-relation queries the response was YES. [2022-07-22 21:20:53,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199148 conditions, 57095 events. 31761/57095 cut-off events. For 197038/201168 co-relation queries the response was YES. Maximal size of possible extension queue 3391. Compared 592942 event pairs, 14416 based on Foata normal form. 510/49462 useless extension candidates. Maximal degree in co-relation 199069. Up to 34159 conditions per place. [2022-07-22 21:20:53,576 INFO L132 encePairwiseOnDemand]: 79/86 looper letters, 90 selfloop transitions, 45 changer transitions 0/193 dead transitions. [2022-07-22 21:20:53,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 193 transitions, 1764 flow [2022-07-22 21:20:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:20:53,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:20:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 220 transitions. [2022-07-22 21:20:53,578 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8527131782945736 [2022-07-22 21:20:53,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 220 transitions. [2022-07-22 21:20:53,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 220 transitions. [2022-07-22 21:20:53,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:53,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 220 transitions. [2022-07-22 21:20:53,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:53,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:53,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:53,580 INFO L186 Difference]: Start difference. First operand has 113 places, 135 transitions, 902 flow. Second operand 3 states and 220 transitions. [2022-07-22 21:20:53,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 193 transitions, 1764 flow [2022-07-22 21:20:54,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 193 transitions, 1740 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:54,331 INFO L242 Difference]: Finished difference. Result has 117 places, 169 transitions, 1534 flow [2022-07-22 21:20:54,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1534, PETRI_PLACES=117, PETRI_TRANSITIONS=169} [2022-07-22 21:20:54,332 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 21 predicate places. [2022-07-22 21:20:54,332 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 169 transitions, 1534 flow [2022-07-22 21:20:54,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:54,332 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:54,332 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:20:54,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 21:20:54,332 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:20:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:54,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2050136410, now seen corresponding path program 1 times [2022-07-22 21:20:54,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:54,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874462854] [2022-07-22 21:20:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:54,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 21:20:54,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:54,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874462854] [2022-07-22 21:20:54,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874462854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:54,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:54,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:54,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906612067] [2022-07-22 21:20:54,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:54,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:20:54,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:54,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:20:54,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:20:54,365 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 86 [2022-07-22 21:20:54,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 169 transitions, 1534 flow. Second operand has 5 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) [2022-07-22 21:20:54,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:54,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 86 [2022-07-22 21:20:54,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand