./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/weaver/popl20-figure1-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:33:26,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:33:26,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:33:27,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:33:27,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:33:27,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:33:27,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:33:27,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:33:27,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:33:27,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:33:27,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:33:27,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:33:27,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:33:27,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:33:27,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:33:27,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:33:27,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:33:27,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:33:27,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:33:27,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:33:27,044 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:33:27,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:33:27,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:33:27,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:33:27,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:33:27,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:33:27,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:33:27,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:33:27,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:33:27,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:33:27,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:33:27,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:33:27,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:33:27,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:33:27,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:33:27,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:33:27,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:33:27,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:33:27,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:33:27,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:33:27,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:33:27,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:33:27,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:33:27,084 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:33:27,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:33:27,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:33:27,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:33:27,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:33:27,086 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:33:27,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:33:27,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:33:27,087 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:33:27,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:33:27,088 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:33:27,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:33:27,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:33:27,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:33:27,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:33:27,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:33:27,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:33:27,089 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:33:27,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:33:27,089 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:33:27,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:33:27,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:33:27,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:33:27,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:33:27,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:33:27,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:33:27,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:33:27,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:33:27,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:33:27,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:33:27,091 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:33:27,091 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:33:27,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:33:27,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-07-19 21:33:27,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:33:27,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:33:27,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:33:27,309 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:33:27,309 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:33:27,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-07-19 21:33:27,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bedd2bc5/756f46d29bbd4f85bab22269cc75ded9/FLAGaa65aecc2 [2022-07-19 21:33:27,755 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:33:27,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-07-19 21:33:27,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bedd2bc5/756f46d29bbd4f85bab22269cc75ded9/FLAGaa65aecc2 [2022-07-19 21:33:28,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bedd2bc5/756f46d29bbd4f85bab22269cc75ded9 [2022-07-19 21:33:28,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:33:28,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:33:28,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:33:28,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:33:28,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:33:28,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48619255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28, skipping insertion in model container [2022-07-19 21:33:28,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:33:28,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:33:28,346 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/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-07-19 21:33:28,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:33:28,354 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:33:28,379 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/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-07-19 21:33:28,384 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:33:28,393 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:33:28,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28 WrapperNode [2022-07-19 21:33:28,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:33:28,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:33:28,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:33:28,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:33:28,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,420 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2022-07-19 21:33:28,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:33:28,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:33:28,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:33:28,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:33:28,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:33:28,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:33:28,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:33:28,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:33:28,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28" (1/1) ... [2022-07-19 21:33:28,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:33:28,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:28,477 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) [2022-07-19 21:33:28,504 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 [2022-07-19 21:33:28,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:33:28,525 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:33:28,525 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:33:28,525 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:33:28,525 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:33:28,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:33:28,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:33:28,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:33:28,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:33:28,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:33:28,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:33:28,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:33:28,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:33:28,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:33:28,528 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:33:28,594 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:33:28,595 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:33:28,781 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:33:28,804 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:33:28,804 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:33:28,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:33:28 BoogieIcfgContainer [2022-07-19 21:33:28,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:33:28,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:33:28,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:33:28,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:33:28,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:33:28" (1/3) ... [2022-07-19 21:33:28,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131972d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:33:28, skipping insertion in model container [2022-07-19 21:33:28,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:28" (2/3) ... [2022-07-19 21:33:28,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131972d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:33:28, skipping insertion in model container [2022-07-19 21:33:28,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:33:28" (3/3) ... [2022-07-19 21:33:28,812 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-07-19 21:33:28,816 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:33:28,822 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:33:28,822 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:33:28,822 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:33:28,880 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:33:28,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2022-07-19 21:33:28,970 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2022-07-19 21:33:28,970 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:33:28,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-07-19 21:33:28,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2022-07-19 21:33:28,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2022-07-19 21:33:28,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:33:28,997 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@30e3a7f5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7c1c0c8d [2022-07-19 21:33:28,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:33:29,022 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2022-07-19 21:33:29,022 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:33:29,023 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:29,023 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, 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] [2022-07-19 21:33:29,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:29,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1515800342, now seen corresponding path program 1 times [2022-07-19 21:33:29,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:29,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194302999] [2022-07-19 21:33:29,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:29,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:29,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:29,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194302999] [2022-07-19 21:33:29,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194302999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:29,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:29,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:33:29,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474964848] [2022-07-19 21:33:29,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:29,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:33:29,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:29,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:33:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:33:29,237 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2022-07-19 21:33:29,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:29,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:29,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2022-07-19 21:33:29,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:29,292 INFO L129 PetriNetUnfolder]: 11/107 cut-off events. [2022-07-19 21:33:29,293 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-19 21:33:29,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-07-19 21:33:29,295 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2022-07-19 21:33:29,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2022-07-19 21:33:29,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:33:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:33:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2022-07-19 21:33:29,305 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2022-07-19 21:33:29,306 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2022-07-19 21:33:29,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2022-07-19 21:33:29,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:29,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2022-07-19 21:33:29,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 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) [2022-07-19 21:33:29,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 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) [2022-07-19 21:33:29,322 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 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) [2022-07-19 21:33:29,323 INFO L186 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2022-07-19 21:33:29,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2022-07-19 21:33:29,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:33:29,331 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2022-07-19 21:33:29,333 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2022-07-19 21:33:29,338 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-07-19 21:33:29,338 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2022-07-19 21:33:29,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:29,339 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:29,339 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, 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] [2022-07-19 21:33:29,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:33:29,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:29,341 INFO L85 PathProgramCache]: Analyzing trace with hash -79113043, now seen corresponding path program 1 times [2022-07-19 21:33:29,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:29,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861456207] [2022-07-19 21:33:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:29,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:29,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:29,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861456207] [2022-07-19 21:33:29,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861456207] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:29,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:29,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:33:29,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201788995] [2022-07-19 21:33:29,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:29,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:33:29,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:29,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:33:29,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:33:29,911 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-19 21:33:29,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:29,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:29,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-19 21:33:29,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:30,340 INFO L129 PetriNetUnfolder]: 67/248 cut-off events. [2022-07-19 21:33:30,341 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-19 21:33:30,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 248 events. 67/248 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 942 event pairs, 34 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 417. Up to 102 conditions per place. [2022-07-19 21:33:30,343 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 11 changer transitions 6/103 dead transitions. [2022-07-19 21:33:30,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 337 flow [2022-07-19 21:33:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:33:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:33:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 698 transitions. [2022-07-19 21:33:30,346 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653558052434457 [2022-07-19 21:33:30,346 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 698 transitions. [2022-07-19 21:33:30,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 698 transitions. [2022-07-19 21:33:30,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:30,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 698 transitions. [2022-07-19 21:33:30,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.166666666666664) internal successors, (698), 12 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:30,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:30,352 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:30,352 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 698 transitions. [2022-07-19 21:33:30,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 337 flow [2022-07-19 21:33:30,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:33:30,356 INFO L242 Difference]: Finished difference. Result has 92 places, 79 transitions, 213 flow [2022-07-19 21:33:30,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2022-07-19 21:33:30,357 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2022-07-19 21:33:30,357 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 213 flow [2022-07-19 21:33:30,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:30,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:30,358 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, 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] [2022-07-19 21:33:30,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:33:30,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:30,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:30,358 INFO L85 PathProgramCache]: Analyzing trace with hash -675229343, now seen corresponding path program 2 times [2022-07-19 21:33:30,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:30,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115750666] [2022-07-19 21:33:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:30,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:30,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:30,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115750666] [2022-07-19 21:33:30,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115750666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:30,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:30,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:33:30,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554710885] [2022-07-19 21:33:30,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:30,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:33:30,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:30,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:33:30,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:33:30,635 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-19 21:33:30,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:30,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:30,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-19 21:33:30,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:30,944 INFO L129 PetriNetUnfolder]: 68/263 cut-off events. [2022-07-19 21:33:30,944 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-07-19 21:33:30,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 263 events. 68/263 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1102 event pairs, 35 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 530. Up to 102 conditions per place. [2022-07-19 21:33:30,946 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2022-07-19 21:33:30,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 429 flow [2022-07-19 21:33:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:33:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:33:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2022-07-19 21:33:30,948 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2022-07-19 21:33:30,949 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2022-07-19 21:33:30,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2022-07-19 21:33:30,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:30,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2022-07-19 21:33:30,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:30,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:30,953 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:30,953 INFO L186 Difference]: Start difference. First operand has 92 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2022-07-19 21:33:30,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 429 flow [2022-07-19 21:33:30,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-07-19 21:33:30,957 INFO L242 Difference]: Finished difference. Result has 100 places, 80 transitions, 247 flow [2022-07-19 21:33:30,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2022-07-19 21:33:30,959 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2022-07-19 21:33:30,959 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 247 flow [2022-07-19 21:33:30,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:30,960 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:30,960 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, 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] [2022-07-19 21:33:30,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:33:30,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1001813793, now seen corresponding path program 3 times [2022-07-19 21:33:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:30,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329721099] [2022-07-19 21:33:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:31,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:31,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329721099] [2022-07-19 21:33:31,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329721099] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:31,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:31,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:33:31,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819065516] [2022-07-19 21:33:31,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:31,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:33:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:33:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:33:31,276 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-19 21:33:31,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:31,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:31,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-19 21:33:31,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:31,595 INFO L129 PetriNetUnfolder]: 72/296 cut-off events. [2022-07-19 21:33:31,595 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-07-19 21:33:31,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 296 events. 72/296 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1336 event pairs, 37 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 652. Up to 105 conditions per place. [2022-07-19 21:33:31,598 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2022-07-19 21:33:31,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 519 flow [2022-07-19 21:33:31,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:33:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:33:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2022-07-19 21:33:31,600 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2022-07-19 21:33:31,600 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2022-07-19 21:33:31,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2022-07-19 21:33:31,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:31,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2022-07-19 21:33:31,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.666666666666664) internal successors, (704), 12 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:31,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:31,607 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:31,607 INFO L186 Difference]: Start difference. First operand has 100 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2022-07-19 21:33:31,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 519 flow [2022-07-19 21:33:31,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-07-19 21:33:31,614 INFO L242 Difference]: Finished difference. Result has 104 places, 84 transitions, 301 flow [2022-07-19 21:33:31,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=301, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2022-07-19 21:33:31,616 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2022-07-19 21:33:31,616 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 301 flow [2022-07-19 21:33:31,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:31,619 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:31,619 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, 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] [2022-07-19 21:33:31,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:33:31,620 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:31,620 INFO L85 PathProgramCache]: Analyzing trace with hash 269524785, now seen corresponding path program 4 times [2022-07-19 21:33:31,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:31,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094518958] [2022-07-19 21:33:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:31,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:31,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:31,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094518958] [2022-07-19 21:33:31,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094518958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:31,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:31,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:33:31,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69565359] [2022-07-19 21:33:31,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:31,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:33:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:31,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:33:31,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:33:31,965 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-19 21:33:31,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 301 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:31,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:31,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-19 21:33:31,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:32,273 INFO L129 PetriNetUnfolder]: 71/301 cut-off events. [2022-07-19 21:33:32,274 INFO L130 PetriNetUnfolder]: For 225/234 co-relation queries the response was YES. [2022-07-19 21:33:32,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 301 events. 71/301 cut-off events. For 225/234 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1386 event pairs, 40 based on Foata normal form. 3/298 useless extension candidates. Maximal degree in co-relation 674. Up to 105 conditions per place. [2022-07-19 21:33:32,275 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2022-07-19 21:33:32,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 559 flow [2022-07-19 21:33:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:33:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:33:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2022-07-19 21:33:32,287 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2022-07-19 21:33:32,287 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2022-07-19 21:33:32,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2022-07-19 21:33:32,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:32,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2022-07-19 21:33:32,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.583333333333336) internal successors, (703), 12 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:32,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:32,291 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:32,292 INFO L186 Difference]: Start difference. First operand has 104 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2022-07-19 21:33:32,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 559 flow [2022-07-19 21:33:32,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2022-07-19 21:33:32,297 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 352 flow [2022-07-19 21:33:32,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2022-07-19 21:33:32,299 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2022-07-19 21:33:32,299 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 352 flow [2022-07-19 21:33:32,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:32,300 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:32,300 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, 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] [2022-07-19 21:33:32,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:33:32,301 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:32,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:32,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1546636013, now seen corresponding path program 5 times [2022-07-19 21:33:32,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:32,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250860666] [2022-07-19 21:33:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:32,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:32,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:32,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250860666] [2022-07-19 21:33:32,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250860666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:32,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:32,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:33:32,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263476091] [2022-07-19 21:33:32,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:32,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:33:32,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:32,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:33:32,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:33:32,615 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-19 21:33:32,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 352 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:32,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:32,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-19 21:33:32,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:32,895 INFO L129 PetriNetUnfolder]: 71/283 cut-off events. [2022-07-19 21:33:32,896 INFO L130 PetriNetUnfolder]: For 320/332 co-relation queries the response was YES. [2022-07-19 21:33:32,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 283 events. 71/283 cut-off events. For 320/332 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1259 event pairs, 34 based on Foata normal form. 4/282 useless extension candidates. Maximal degree in co-relation 676. Up to 105 conditions per place. [2022-07-19 21:33:32,898 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2022-07-19 21:33:32,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 563 flow [2022-07-19 21:33:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:33:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:33:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2022-07-19 21:33:32,900 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2022-07-19 21:33:32,900 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2022-07-19 21:33:32,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2022-07-19 21:33:32,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:32,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2022-07-19 21:33:32,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:32,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:32,904 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:32,904 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2022-07-19 21:33:32,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 563 flow [2022-07-19 21:33:32,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-07-19 21:33:32,910 INFO L242 Difference]: Finished difference. Result has 115 places, 86 transitions, 368 flow [2022-07-19 21:33:32,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=115, PETRI_TRANSITIONS=86} [2022-07-19 21:33:32,912 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2022-07-19 21:33:32,912 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 86 transitions, 368 flow [2022-07-19 21:33:32,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:32,912 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:32,913 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, 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] [2022-07-19 21:33:32,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:33:32,913 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:32,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1009642839, now seen corresponding path program 6 times [2022-07-19 21:33:32,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:32,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919625204] [2022-07-19 21:33:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:32,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:33,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919625204] [2022-07-19 21:33:33,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919625204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:33,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:33,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:33:33,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072866195] [2022-07-19 21:33:33,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:33,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:33:33,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:33:33,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:33:33,213 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-19 21:33:33,213 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 86 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:33,213 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:33,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-19 21:33:33,214 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:33,487 INFO L129 PetriNetUnfolder]: 68/250 cut-off events. [2022-07-19 21:33:33,487 INFO L130 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2022-07-19 21:33:33,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 250 events. 68/250 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 981 event pairs, 34 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 620. Up to 105 conditions per place. [2022-07-19 21:33:33,489 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2022-07-19 21:33:33,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 102 transitions, 547 flow [2022-07-19 21:33:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:33:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:33:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2022-07-19 21:33:33,491 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2022-07-19 21:33:33,491 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2022-07-19 21:33:33,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2022-07-19 21:33:33,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:33,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2022-07-19 21:33:33,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.5) internal successors, (690), 12 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:33,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:33,494 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:33,494 INFO L186 Difference]: Start difference. First operand has 115 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2022-07-19 21:33:33,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 102 transitions, 547 flow [2022-07-19 21:33:33,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-07-19 21:33:33,497 INFO L242 Difference]: Finished difference. Result has 114 places, 85 transitions, 350 flow [2022-07-19 21:33:33,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=114, PETRI_TRANSITIONS=85} [2022-07-19 21:33:33,498 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2022-07-19 21:33:33,498 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 85 transitions, 350 flow [2022-07-19 21:33:33,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:33,499 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:33,499 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, 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, 1, 1, 1, 1] [2022-07-19 21:33:33,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:33:33,499 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash 239848237, now seen corresponding path program 1 times [2022-07-19 21:33:33,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:33,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987902756] [2022-07-19 21:33:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:33,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:33,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:33,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987902756] [2022-07-19 21:33:33,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987902756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:33,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662148316] [2022-07-19 21:33:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:33,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:33,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:33,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:33,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:33:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:33,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:33:33,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:34,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:34,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662148316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:34,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:34,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-19 21:33:34,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028779493] [2022-07-19 21:33:34,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:34,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 21:33:34,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:34,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 21:33:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 21:33:34,735 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:33:34,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 85 transitions, 350 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:34,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:34,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:33:34,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:36,313 INFO L129 PetriNetUnfolder]: 168/599 cut-off events. [2022-07-19 21:33:36,313 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-19 21:33:36,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1325 conditions, 599 events. 168/599 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3330 event pairs, 9 based on Foata normal form. 13/612 useless extension candidates. Maximal degree in co-relation 1304. Up to 111 conditions per place. [2022-07-19 21:33:36,317 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2022-07-19 21:33:36,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 251 transitions, 1334 flow [2022-07-19 21:33:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 21:33:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-19 21:33:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2022-07-19 21:33:36,322 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2022-07-19 21:33:36,322 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2022-07-19 21:33:36,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2022-07-19 21:33:36,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:36,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2022-07-19 21:33:36,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:36,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:36,333 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:36,333 INFO L186 Difference]: Start difference. First operand has 114 places, 85 transitions, 350 flow. Second operand 48 states and 2702 transitions. [2022-07-19 21:33:36,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 251 transitions, 1334 flow [2022-07-19 21:33:36,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1228 flow, removed 24 selfloop flow, removed 16 redundant places. [2022-07-19 21:33:36,338 INFO L242 Difference]: Finished difference. Result has 152 places, 152 transitions, 752 flow [2022-07-19 21:33:36,338 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=752, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2022-07-19 21:33:36,339 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2022-07-19 21:33:36,339 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 752 flow [2022-07-19 21:33:36,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:36,340 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:36,340 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, 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, 1, 1, 1, 1] [2022-07-19 21:33:36,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:36,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:36,557 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:36,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2139285437, now seen corresponding path program 2 times [2022-07-19 21:33:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:36,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466249025] [2022-07-19 21:33:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:36,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:36,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:36,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466249025] [2022-07-19 21:33:36,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466249025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:36,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154231844] [2022-07-19 21:33:36,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:33:36,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:36,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:36,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:36,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:33:36,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:33:36,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:33:36,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:37,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:37,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154231844] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:37,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:37,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-19 21:33:37,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852401503] [2022-07-19 21:33:37,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:37,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 21:33:37,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:37,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 21:33:37,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 21:33:37,666 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:33:37,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 752 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:37,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:37,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:33:37,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:39,435 INFO L129 PetriNetUnfolder]: 226/775 cut-off events. [2022-07-19 21:33:39,435 INFO L130 PetriNetUnfolder]: For 686/686 co-relation queries the response was YES. [2022-07-19 21:33:39,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2177 conditions, 775 events. 226/775 cut-off events. For 686/686 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4712 event pairs, 13 based on Foata normal form. 1/775 useless extension candidates. Maximal degree in co-relation 2152. Up to 211 conditions per place. [2022-07-19 21:33:39,440 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 99 selfloop transitions, 159 changer transitions 6/306 dead transitions. [2022-07-19 21:33:39,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 306 transitions, 2042 flow [2022-07-19 21:33:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 21:33:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-19 21:33:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3061 transitions. [2022-07-19 21:33:39,443 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6253319713993871 [2022-07-19 21:33:39,443 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3061 transitions. [2022-07-19 21:33:39,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3061 transitions. [2022-07-19 21:33:39,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:39,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3061 transitions. [2022-07-19 21:33:39,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 55.654545454545456) internal successors, (3061), 55 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:39,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 89.0) internal successors, (4984), 56 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:39,453 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 89.0) internal successors, (4984), 56 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:39,453 INFO L186 Difference]: Start difference. First operand has 152 places, 152 transitions, 752 flow. Second operand 55 states and 3061 transitions. [2022-07-19 21:33:39,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 306 transitions, 2042 flow [2022-07-19 21:33:39,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 306 transitions, 1875 flow, removed 69 selfloop flow, removed 9 redundant places. [2022-07-19 21:33:39,462 INFO L242 Difference]: Finished difference. Result has 204 places, 241 transitions, 1570 flow [2022-07-19 21:33:39,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1570, PETRI_PLACES=204, PETRI_TRANSITIONS=241} [2022-07-19 21:33:39,463 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 125 predicate places. [2022-07-19 21:33:39,463 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 241 transitions, 1570 flow [2022-07-19 21:33:39,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:39,464 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:39,464 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, 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, 1, 1, 1, 1] [2022-07-19 21:33:39,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 21:33:39,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 21:33:39,680 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1975222373, now seen corresponding path program 3 times [2022-07-19 21:33:39,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:39,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190138793] [2022-07-19 21:33:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:39,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:39,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:39,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190138793] [2022-07-19 21:33:39,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190138793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:39,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428352520] [2022-07-19 21:33:39,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:33:39,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:39,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:39,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:39,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:33:40,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:33:40,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:40,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:33:40,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:40,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:40,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428352520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:40,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:40,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-19 21:33:40,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959936894] [2022-07-19 21:33:40,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:40,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 21:33:40,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 21:33:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 21:33:40,746 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:33:40,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 241 transitions, 1570 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:40,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:40,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:33:40,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:42,003 INFO L129 PetriNetUnfolder]: 279/963 cut-off events. [2022-07-19 21:33:42,003 INFO L130 PetriNetUnfolder]: For 1582/1582 co-relation queries the response was YES. [2022-07-19 21:33:42,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3264 conditions, 963 events. 279/963 cut-off events. For 1582/1582 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6380 event pairs, 20 based on Foata normal form. 1/950 useless extension candidates. Maximal degree in co-relation 3231. Up to 292 conditions per place. [2022-07-19 21:33:42,011 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 133 selfloop transitions, 188 changer transitions 6/369 dead transitions. [2022-07-19 21:33:42,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 369 transitions, 3081 flow [2022-07-19 21:33:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 21:33:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-19 21:33:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2022-07-19 21:33:42,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2022-07-19 21:33:42,014 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2022-07-19 21:33:42,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2022-07-19 21:33:42,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:42,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2022-07-19 21:33:42,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.05128205128205) internal successors, (2186), 39 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:42,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:42,020 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:42,020 INFO L186 Difference]: Start difference. First operand has 204 places, 241 transitions, 1570 flow. Second operand 39 states and 2186 transitions. [2022-07-19 21:33:42,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 369 transitions, 3081 flow [2022-07-19 21:33:42,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 369 transitions, 2820 flow, removed 74 selfloop flow, removed 18 redundant places. [2022-07-19 21:33:42,036 INFO L242 Difference]: Finished difference. Result has 232 places, 299 transitions, 2385 flow [2022-07-19 21:33:42,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2385, PETRI_PLACES=232, PETRI_TRANSITIONS=299} [2022-07-19 21:33:42,037 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 153 predicate places. [2022-07-19 21:33:42,037 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 299 transitions, 2385 flow [2022-07-19 21:33:42,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:42,038 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:42,038 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, 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, 1, 1, 1, 1] [2022-07-19 21:33:42,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 21:33:42,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:42,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:42,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:42,275 INFO L85 PathProgramCache]: Analyzing trace with hash -6530063, now seen corresponding path program 4 times [2022-07-19 21:33:42,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:42,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228576596] [2022-07-19 21:33:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:42,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:42,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:42,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228576596] [2022-07-19 21:33:42,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228576596] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:42,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250444818] [2022-07-19 21:33:42,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:33:42,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:42,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:42,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:42,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:33:42,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:33:42,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:42,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:33:42,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:42,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:43,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250444818] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:43,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:43,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-19 21:33:43,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322800712] [2022-07-19 21:33:43,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:43,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 21:33:43,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:43,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 21:33:43,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 21:33:43,267 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:33:43,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 299 transitions, 2385 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:43,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:43,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:33:43,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:46,451 INFO L129 PetriNetUnfolder]: 364/1329 cut-off events. [2022-07-19 21:33:46,451 INFO L130 PetriNetUnfolder]: For 3205/3207 co-relation queries the response was YES. [2022-07-19 21:33:46,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4795 conditions, 1329 events. 364/1329 cut-off events. For 3205/3207 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9960 event pairs, 21 based on Foata normal form. 3/1311 useless extension candidates. Maximal degree in co-relation 4758. Up to 194 conditions per place. [2022-07-19 21:33:46,461 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 168 selfloop transitions, 308 changer transitions 6/524 dead transitions. [2022-07-19 21:33:46,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 524 transitions, 4927 flow [2022-07-19 21:33:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-19 21:33:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-19 21:33:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4518 transitions. [2022-07-19 21:33:46,472 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6267166042446941 [2022-07-19 21:33:46,472 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4518 transitions. [2022-07-19 21:33:46,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4518 transitions. [2022-07-19 21:33:46,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:46,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4518 transitions. [2022-07-19 21:33:46,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.77777777777778) internal successors, (4518), 81 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:46,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:46,498 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:46,498 INFO L186 Difference]: Start difference. First operand has 232 places, 299 transitions, 2385 flow. Second operand 81 states and 4518 transitions. [2022-07-19 21:33:46,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 524 transitions, 4927 flow [2022-07-19 21:33:46,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 524 transitions, 4790 flow, removed 62 selfloop flow, removed 8 redundant places. [2022-07-19 21:33:46,520 INFO L242 Difference]: Finished difference. Result has 315 places, 399 transitions, 4004 flow [2022-07-19 21:33:46,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=4004, PETRI_PLACES=315, PETRI_TRANSITIONS=399} [2022-07-19 21:33:46,521 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 236 predicate places. [2022-07-19 21:33:46,521 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 399 transitions, 4004 flow [2022-07-19 21:33:46,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:46,522 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:46,522 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, 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, 1, 1, 1, 1] [2022-07-19 21:33:46,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:46,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:46,735 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:46,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:46,736 INFO L85 PathProgramCache]: Analyzing trace with hash 820807317, now seen corresponding path program 5 times [2022-07-19 21:33:46,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:46,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325143650] [2022-07-19 21:33:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:46,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:46,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:46,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325143650] [2022-07-19 21:33:46,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325143650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:46,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732017455] [2022-07-19 21:33:46,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:33:46,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:46,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:46,991 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:47,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:33:47,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:33:47,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:33:47,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:47,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:47,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732017455] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:47,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:47,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-19 21:33:47,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912201892] [2022-07-19 21:33:47,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:47,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 21:33:47,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 21:33:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 21:33:47,642 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:33:47,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 399 transitions, 4004 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:47,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:47,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:33:47,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:50,584 INFO L129 PetriNetUnfolder]: 387/1376 cut-off events. [2022-07-19 21:33:50,584 INFO L130 PetriNetUnfolder]: For 6525/6527 co-relation queries the response was YES. [2022-07-19 21:33:50,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 1376 events. 387/1376 cut-off events. For 6525/6527 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10409 event pairs, 22 based on Foata normal form. 3/1361 useless extension candidates. Maximal degree in co-relation 6005. Up to 215 conditions per place. [2022-07-19 21:33:50,599 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 180 selfloop transitions, 328 changer transitions 6/556 dead transitions. [2022-07-19 21:33:50,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 556 transitions, 6290 flow [2022-07-19 21:33:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-19 21:33:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-19 21:33:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4528 transitions. [2022-07-19 21:33:50,604 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6281037591899015 [2022-07-19 21:33:50,604 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4528 transitions. [2022-07-19 21:33:50,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4528 transitions. [2022-07-19 21:33:50,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:50,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4528 transitions. [2022-07-19 21:33:50,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.901234567901234) internal successors, (4528), 81 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,617 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,617 INFO L186 Difference]: Start difference. First operand has 315 places, 399 transitions, 4004 flow. Second operand 81 states and 4528 transitions. [2022-07-19 21:33:50,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 556 transitions, 6290 flow [2022-07-19 21:33:50,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 556 transitions, 5986 flow, removed 82 selfloop flow, removed 19 redundant places. [2022-07-19 21:33:50,654 INFO L242 Difference]: Finished difference. Result has 381 places, 434 transitions, 4948 flow [2022-07-19 21:33:50,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=4948, PETRI_PLACES=381, PETRI_TRANSITIONS=434} [2022-07-19 21:33:50,655 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 302 predicate places. [2022-07-19 21:33:50,655 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 434 transitions, 4948 flow [2022-07-19 21:33:50,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,656 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:50,656 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, 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, 1, 1, 1, 1] [2022-07-19 21:33:50,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:50,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 21:33:50,871 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash -609410941, now seen corresponding path program 6 times [2022-07-19 21:33:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:50,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017609790] [2022-07-19 21:33:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:50,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:51,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017609790] [2022-07-19 21:33:51,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017609790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:51,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136087000] [2022-07-19 21:33:51,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:33:51,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:51,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:51,137 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:51,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:33:51,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:33:51,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:51,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:33:51,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136087000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:51,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:51,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-19 21:33:51,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647832552] [2022-07-19 21:33:51,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:51,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 21:33:51,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:51,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 21:33:51,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 21:33:51,966 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:33:51,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 434 transitions, 4948 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:51,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:33:51,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:53,598 INFO L129 PetriNetUnfolder]: 514/1746 cut-off events. [2022-07-19 21:33:53,598 INFO L130 PetriNetUnfolder]: For 12376/12378 co-relation queries the response was YES. [2022-07-19 21:33:53,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8693 conditions, 1746 events. 514/1746 cut-off events. For 12376/12378 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13916 event pairs, 25 based on Foata normal form. 1/1741 useless extension candidates. Maximal degree in co-relation 8636. Up to 483 conditions per place. [2022-07-19 21:33:53,614 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 222 selfloop transitions, 332 changer transitions 6/602 dead transitions. [2022-07-19 21:33:53,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 602 transitions, 7994 flow [2022-07-19 21:33:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 21:33:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-19 21:33:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2185 transitions. [2022-07-19 21:33:53,616 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6295015845577643 [2022-07-19 21:33:53,616 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2185 transitions. [2022-07-19 21:33:53,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2185 transitions. [2022-07-19 21:33:53,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:53,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2185 transitions. [2022-07-19 21:33:53,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.02564102564103) internal successors, (2185), 39 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,622 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,622 INFO L186 Difference]: Start difference. First operand has 381 places, 434 transitions, 4948 flow. Second operand 39 states and 2185 transitions. [2022-07-19 21:33:53,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 602 transitions, 7994 flow [2022-07-19 21:33:53,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 602 transitions, 7223 flow, removed 117 selfloop flow, removed 56 redundant places. [2022-07-19 21:33:53,686 INFO L242 Difference]: Finished difference. Result has 370 places, 524 transitions, 6675 flow [2022-07-19 21:33:53,687 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6675, PETRI_PLACES=370, PETRI_TRANSITIONS=524} [2022-07-19 21:33:53,687 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 291 predicate places. [2022-07-19 21:33:53,688 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 524 transitions, 6675 flow [2022-07-19 21:33:53,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,688 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:53,688 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, 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, 1, 1, 1, 1] [2022-07-19 21:33:53,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:53,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:53,924 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:53,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:53,924 INFO L85 PathProgramCache]: Analyzing trace with hash -248882329, now seen corresponding path program 7 times [2022-07-19 21:33:53,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:53,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433671809] [2022-07-19 21:33:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:53,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:54,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:54,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433671809] [2022-07-19 21:33:54,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433671809] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:54,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090058194] [2022-07-19 21:33:54,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:33:54,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:54,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:54,184 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:54,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:33:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:54,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:33:54,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:54,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:54,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090058194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:54,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:54,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-19 21:33:54,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911819411] [2022-07-19 21:33:54,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:54,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 21:33:54,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:54,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 21:33:54,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 21:33:55,000 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:33:55,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 524 transitions, 6675 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:55,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:55,001 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:33:55,001 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:57,676 INFO L129 PetriNetUnfolder]: 574/1932 cut-off events. [2022-07-19 21:33:57,676 INFO L130 PetriNetUnfolder]: For 16164/16166 co-relation queries the response was YES. [2022-07-19 21:33:57,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10161 conditions, 1932 events. 574/1932 cut-off events. For 16164/16166 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15813 event pairs, 26 based on Foata normal form. 1/1926 useless extension candidates. Maximal degree in co-relation 10094. Up to 488 conditions per place. [2022-07-19 21:33:57,698 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 187 selfloop transitions, 443 changer transitions 6/678 dead transitions. [2022-07-19 21:33:57,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 678 transitions, 9597 flow [2022-07-19 21:33:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 21:33:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-19 21:33:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3334 transitions. [2022-07-19 21:33:57,701 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6243445692883896 [2022-07-19 21:33:57,701 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3334 transitions. [2022-07-19 21:33:57,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3334 transitions. [2022-07-19 21:33:57,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:57,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3334 transitions. [2022-07-19 21:33:57,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 55.56666666666667) internal successors, (3334), 60 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:57,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 89.0) internal successors, (5429), 61 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:57,741 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 89.0) internal successors, (5429), 61 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:57,741 INFO L186 Difference]: Start difference. First operand has 370 places, 524 transitions, 6675 flow. Second operand 60 states and 3334 transitions. [2022-07-19 21:33:57,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 678 transitions, 9597 flow [2022-07-19 21:33:57,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 678 transitions, 9352 flow, removed 97 selfloop flow, removed 12 redundant places. [2022-07-19 21:33:57,834 INFO L242 Difference]: Finished difference. Result has 428 places, 605 transitions, 8996 flow [2022-07-19 21:33:57,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=8996, PETRI_PLACES=428, PETRI_TRANSITIONS=605} [2022-07-19 21:33:57,835 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 349 predicate places. [2022-07-19 21:33:57,835 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 605 transitions, 8996 flow [2022-07-19 21:33:57,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:57,836 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:57,836 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, 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, 1, 1, 1, 1] [2022-07-19 21:33:57,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:58,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:58,054 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:58,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:58,054 INFO L85 PathProgramCache]: Analyzing trace with hash -974553547, now seen corresponding path program 8 times [2022-07-19 21:33:58,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:58,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552413006] [2022-07-19 21:33:58,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:58,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:58,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552413006] [2022-07-19 21:33:58,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552413006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821505898] [2022-07-19 21:33:58,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:33:58,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:58,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:58,300 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:58,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:33:58,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:33:58,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:58,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:33:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:58,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:59,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821505898] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:59,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:59,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-19 21:33:59,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333533328] [2022-07-19 21:33:59,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:59,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 21:33:59,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:59,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 21:33:59,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 21:33:59,046 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:33:59,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 605 transitions, 8996 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:59,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:59,047 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:33:59,047 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:00,115 INFO L129 PetriNetUnfolder]: 574/1942 cut-off events. [2022-07-19 21:34:00,115 INFO L130 PetriNetUnfolder]: For 18163/18177 co-relation queries the response was YES. [2022-07-19 21:34:00,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11175 conditions, 1942 events. 574/1942 cut-off events. For 18163/18177 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15957 event pairs, 60 based on Foata normal form. 5/1938 useless extension candidates. Maximal degree in co-relation 11097. Up to 758 conditions per place. [2022-07-19 21:34:00,134 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 244 selfloop transitions, 346 changer transitions 6/638 dead transitions. [2022-07-19 21:34:00,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 638 transitions, 10522 flow [2022-07-19 21:34:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 21:34:00,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-19 21:34:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1452 transitions. [2022-07-19 21:34:00,136 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6274848746758859 [2022-07-19 21:34:00,136 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1452 transitions. [2022-07-19 21:34:00,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1452 transitions. [2022-07-19 21:34:00,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:00,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1452 transitions. [2022-07-19 21:34:00,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.84615384615385) internal successors, (1452), 26 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:00,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:00,140 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:00,140 INFO L186 Difference]: Start difference. First operand has 428 places, 605 transitions, 8996 flow. Second operand 26 states and 1452 transitions. [2022-07-19 21:34:00,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 638 transitions, 10522 flow [2022-07-19 21:34:00,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 638 transitions, 10144 flow, removed 102 selfloop flow, removed 27 redundant places. [2022-07-19 21:34:00,249 INFO L242 Difference]: Finished difference. Result has 429 places, 610 transitions, 9687 flow [2022-07-19 21:34:00,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=8630, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9687, PETRI_PLACES=429, PETRI_TRANSITIONS=610} [2022-07-19 21:34:00,250 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 350 predicate places. [2022-07-19 21:34:00,251 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 610 transitions, 9687 flow [2022-07-19 21:34:00,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:00,251 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:00,251 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, 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, 1, 1, 1, 1] [2022-07-19 21:34:00,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:00,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 21:34:00,469 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1457300325, now seen corresponding path program 9 times [2022-07-19 21:34:00,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:00,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602813801] [2022-07-19 21:34:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:00,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:00,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:00,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602813801] [2022-07-19 21:34:00,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602813801] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:00,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407389590] [2022-07-19 21:34:00,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:34:00,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:00,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:00,696 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:00,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:34:00,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:34:00,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:00,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:34:00,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:01,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:01,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407389590] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:01,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:01,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-07-19 21:34:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962877011] [2022-07-19 21:34:01,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:01,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 21:34:01,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:01,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 21:34:01,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 21:34:01,581 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:34:01,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 610 transitions, 9687 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:01,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:01,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:34:01,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:05,189 INFO L129 PetriNetUnfolder]: 801/2801 cut-off events. [2022-07-19 21:34:05,189 INFO L130 PetriNetUnfolder]: For 30194/30196 co-relation queries the response was YES. [2022-07-19 21:34:05,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16697 conditions, 2801 events. 801/2801 cut-off events. For 30194/30196 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25772 event pairs, 35 based on Foata normal form. 2/2794 useless extension candidates. Maximal degree in co-relation 16617. Up to 493 conditions per place. [2022-07-19 21:34:05,219 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 215 selfloop transitions, 689 changer transitions 12/958 dead transitions. [2022-07-19 21:34:05,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 958 transitions, 16814 flow [2022-07-19 21:34:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-19 21:34:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-07-19 21:34:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5261 transitions. [2022-07-19 21:34:05,223 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6222353636901242 [2022-07-19 21:34:05,223 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5261 transitions. [2022-07-19 21:34:05,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5261 transitions. [2022-07-19 21:34:05,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:05,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5261 transitions. [2022-07-19 21:34:05,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 55.37894736842105) internal successors, (5261), 95 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:05,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 89.0) internal successors, (8544), 96 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:05,234 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 89.0) internal successors, (8544), 96 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:05,234 INFO L186 Difference]: Start difference. First operand has 429 places, 610 transitions, 9687 flow. Second operand 95 states and 5261 transitions. [2022-07-19 21:34:05,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 958 transitions, 16814 flow [2022-07-19 21:34:05,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 958 transitions, 16379 flow, removed 11 selfloop flow, removed 19 redundant places. [2022-07-19 21:34:05,452 INFO L242 Difference]: Finished difference. Result has 522 places, 850 transitions, 15829 flow [2022-07-19 21:34:05,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=9390, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=15829, PETRI_PLACES=522, PETRI_TRANSITIONS=850} [2022-07-19 21:34:05,453 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 443 predicate places. [2022-07-19 21:34:05,453 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 850 transitions, 15829 flow [2022-07-19 21:34:05,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:05,454 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:05,454 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, 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, 1, 1, 1, 1] [2022-07-19 21:34:05,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-19 21:34:05,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 21:34:05,667 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:05,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1685575279, now seen corresponding path program 10 times [2022-07-19 21:34:05,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:05,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477076472] [2022-07-19 21:34:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:05,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:05,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:05,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477076472] [2022-07-19 21:34:05,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477076472] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:05,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038784648] [2022-07-19 21:34:05,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:34:05,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:05,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:05,918 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:05,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:34:05,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:34:05,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:05,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:34:05,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:06,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:06,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038784648] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:06,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:06,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-19 21:34:06,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392538243] [2022-07-19 21:34:06,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:06,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 21:34:06,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:06,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 21:34:06,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 21:34:06,667 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:34:06,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 850 transitions, 15829 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:06,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:06,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:34:06,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:09,173 INFO L129 PetriNetUnfolder]: 939/3221 cut-off events. [2022-07-19 21:34:09,173 INFO L130 PetriNetUnfolder]: For 58668/58670 co-relation queries the response was YES. [2022-07-19 21:34:09,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22162 conditions, 3221 events. 939/3221 cut-off events. For 58668/58670 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30406 event pairs, 43 based on Foata normal form. 2/3216 useless extension candidates. Maximal degree in co-relation 22063. Up to 632 conditions per place. [2022-07-19 21:34:09,248 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 361 selfloop transitions, 665 changer transitions 12/1080 dead transitions. [2022-07-19 21:34:09,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 1080 transitions, 21702 flow [2022-07-19 21:34:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-19 21:34:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-19 21:34:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3584 transitions. [2022-07-19 21:34:09,250 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6292134831460674 [2022-07-19 21:34:09,250 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3584 transitions. [2022-07-19 21:34:09,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3584 transitions. [2022-07-19 21:34:09,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:09,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3584 transitions. [2022-07-19 21:34:09,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.0) internal successors, (3584), 64 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:09,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:09,260 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:09,260 INFO L186 Difference]: Start difference. First operand has 522 places, 850 transitions, 15829 flow. Second operand 64 states and 3584 transitions. [2022-07-19 21:34:09,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 1080 transitions, 21702 flow [2022-07-19 21:34:09,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1080 transitions, 20303 flow, removed 588 selfloop flow, removed 25 redundant places. [2022-07-19 21:34:09,605 INFO L242 Difference]: Finished difference. Result has 561 places, 983 transitions, 19489 flow [2022-07-19 21:34:09,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=15001, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=539, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=19489, PETRI_PLACES=561, PETRI_TRANSITIONS=983} [2022-07-19 21:34:09,606 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 482 predicate places. [2022-07-19 21:34:09,606 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 983 transitions, 19489 flow [2022-07-19 21:34:09,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:09,607 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:09,607 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, 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, 1, 1, 1, 1] [2022-07-19 21:34:09,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:09,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:34:09,816 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:09,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:09,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1086203295, now seen corresponding path program 11 times [2022-07-19 21:34:09,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:09,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412046414] [2022-07-19 21:34:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:09,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:10,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:10,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412046414] [2022-07-19 21:34:10,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412046414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:10,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139907224] [2022-07-19 21:34:10,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:34:10,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:10,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:10,100 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:10,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:34:10,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:34:10,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:34:10,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:10,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:10,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139907224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:10,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:10,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-19 21:34:10,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331167900] [2022-07-19 21:34:10,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:10,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 21:34:10,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 21:34:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 21:34:10,881 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:34:10,882 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 983 transitions, 19489 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:10,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:10,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:34:10,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:12,466 INFO L129 PetriNetUnfolder]: 937/3208 cut-off events. [2022-07-19 21:34:12,467 INFO L130 PetriNetUnfolder]: For 55886/55902 co-relation queries the response was YES. [2022-07-19 21:34:12,489 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22512 conditions, 3208 events. 937/3208 cut-off events. For 55886/55902 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30232 event pairs, 81 based on Foata normal form. 5/3193 useless extension candidates. Maximal degree in co-relation 22411. Up to 1229 conditions per place. [2022-07-19 21:34:12,505 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 421 selfloop transitions, 547 changer transitions 12/1022 dead transitions. [2022-07-19 21:34:12,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 1022 transitions, 21912 flow [2022-07-19 21:34:12,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 21:34:12,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-19 21:34:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1878 transitions. [2022-07-19 21:34:12,507 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6206212822207535 [2022-07-19 21:34:12,507 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1878 transitions. [2022-07-19 21:34:12,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1878 transitions. [2022-07-19 21:34:12,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:12,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1878 transitions. [2022-07-19 21:34:12,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.23529411764706) internal successors, (1878), 34 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:12,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 89.0) internal successors, (3115), 35 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:12,511 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 89.0) internal successors, (3115), 35 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:12,511 INFO L186 Difference]: Start difference. First operand has 561 places, 983 transitions, 19489 flow. Second operand 34 states and 1878 transitions. [2022-07-19 21:34:12,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 1022 transitions, 21912 flow [2022-07-19 21:34:12,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1022 transitions, 21461 flow, removed 88 selfloop flow, removed 32 redundant places. [2022-07-19 21:34:12,898 INFO L242 Difference]: Finished difference. Result has 566 places, 993 transitions, 20815 flow [2022-07-19 21:34:12,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=19045, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=20815, PETRI_PLACES=566, PETRI_TRANSITIONS=993} [2022-07-19 21:34:12,899 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 487 predicate places. [2022-07-19 21:34:12,899 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 993 transitions, 20815 flow [2022-07-19 21:34:12,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:12,900 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:12,900 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, 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, 1, 1, 1, 1] [2022-07-19 21:34:12,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:13,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 21:34:13,115 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash -998248241, now seen corresponding path program 12 times [2022-07-19 21:34:13,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:13,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331319649] [2022-07-19 21:34:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:13,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:13,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:13,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331319649] [2022-07-19 21:34:13,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331319649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:13,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052526461] [2022-07-19 21:34:13,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:34:13,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:13,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:13,341 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:13,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:34:13,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:34:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:13,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:34:13,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:13,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:14,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052526461] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:14,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:14,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-19 21:34:14,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291992643] [2022-07-19 21:34:14,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:14,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 21:34:14,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 21:34:14,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1104, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 21:34:14,160 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:34:14,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 993 transitions, 20815 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:14,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:14,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:34:14,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:16,468 INFO L129 PetriNetUnfolder]: 941/3563 cut-off events. [2022-07-19 21:34:16,468 INFO L130 PetriNetUnfolder]: For 63398/63414 co-relation queries the response was YES. [2022-07-19 21:34:16,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24454 conditions, 3563 events. 941/3563 cut-off events. For 63398/63414 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35582 event pairs, 65 based on Foata normal form. 5/3563 useless extension candidates. Maximal degree in co-relation 24343. Up to 1221 conditions per place. [2022-07-19 21:34:16,511 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 397 selfloop transitions, 588 changer transitions 12/1039 dead transitions. [2022-07-19 21:34:16,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1039 transitions, 23359 flow [2022-07-19 21:34:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 21:34:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-19 21:34:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2158 transitions. [2022-07-19 21:34:16,513 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6217228464419475 [2022-07-19 21:34:16,514 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2158 transitions. [2022-07-19 21:34:16,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2158 transitions. [2022-07-19 21:34:16,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:16,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2158 transitions. [2022-07-19 21:34:16,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.333333333333336) internal successors, (2158), 39 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:16,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:16,518 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:16,518 INFO L186 Difference]: Start difference. First operand has 566 places, 993 transitions, 20815 flow. Second operand 39 states and 2158 transitions. [2022-07-19 21:34:16,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1039 transitions, 23359 flow [2022-07-19 21:34:16,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1039 transitions, 22889 flow, removed 18 selfloop flow, removed 20 redundant places. [2022-07-19 21:34:16,897 INFO L242 Difference]: Finished difference. Result has 589 places, 1003 transitions, 22368 flow [2022-07-19 21:34:16,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=20352, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=22368, PETRI_PLACES=589, PETRI_TRANSITIONS=1003} [2022-07-19 21:34:16,899 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 510 predicate places. [2022-07-19 21:34:16,899 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1003 transitions, 22368 flow [2022-07-19 21:34:16,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:16,899 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:16,899 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, 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, 1, 1, 1, 1] [2022-07-19 21:34:16,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:17,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:17,104 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:17,104 INFO L85 PathProgramCache]: Analyzing trace with hash -54177703, now seen corresponding path program 13 times [2022-07-19 21:34:17,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:17,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350875727] [2022-07-19 21:34:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:17,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:17,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:17,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350875727] [2022-07-19 21:34:17,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350875727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:17,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141633774] [2022-07-19 21:34:17,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:34:17,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:17,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:17,282 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:17,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:34:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:17,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:34:17,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:17,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:18,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141633774] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:18,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:18,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-19 21:34:18,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517890659] [2022-07-19 21:34:18,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:18,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 21:34:18,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 21:34:18,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 21:34:18,156 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:34:18,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 1003 transitions, 22368 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:18,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:18,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:34:18,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:20,398 INFO L129 PetriNetUnfolder]: 941/3561 cut-off events. [2022-07-19 21:34:20,398 INFO L130 PetriNetUnfolder]: For 71448/71459 co-relation queries the response was YES. [2022-07-19 21:34:20,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25667 conditions, 3561 events. 941/3561 cut-off events. For 71448/71459 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 35543 event pairs, 110 based on Foata normal form. 5/3541 useless extension candidates. Maximal degree in co-relation 25550. Up to 1194 conditions per place. [2022-07-19 21:34:20,440 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 409 selfloop transitions, 581 changer transitions 12/1044 dead transitions. [2022-07-19 21:34:20,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1044 transitions, 24884 flow [2022-07-19 21:34:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 21:34:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-19 21:34:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2041 transitions. [2022-07-19 21:34:20,442 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6197995748557547 [2022-07-19 21:34:20,442 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2041 transitions. [2022-07-19 21:34:20,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2041 transitions. [2022-07-19 21:34:20,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:20,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2041 transitions. [2022-07-19 21:34:20,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.16216216216216) internal successors, (2041), 37 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:20,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:20,446 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:20,446 INFO L186 Difference]: Start difference. First operand has 589 places, 1003 transitions, 22368 flow. Second operand 37 states and 2041 transitions. [2022-07-19 21:34:20,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1044 transitions, 24884 flow [2022-07-19 21:34:20,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 1044 transitions, 24711 flow, removed 34 selfloop flow, removed 22 redundant places. [2022-07-19 21:34:20,935 INFO L242 Difference]: Finished difference. Result has 608 places, 1016 transitions, 24077 flow [2022-07-19 21:34:20,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=22212, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=24077, PETRI_PLACES=608, PETRI_TRANSITIONS=1016} [2022-07-19 21:34:20,936 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 529 predicate places. [2022-07-19 21:34:20,936 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1016 transitions, 24077 flow [2022-07-19 21:34:20,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:20,937 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:20,937 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, 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, 1, 1, 1, 1] [2022-07-19 21:34:20,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:21,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-07-19 21:34:21,156 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1848370869, now seen corresponding path program 14 times [2022-07-19 21:34:21,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:21,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813437845] [2022-07-19 21:34:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:21,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:21,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813437845] [2022-07-19 21:34:21,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813437845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835663529] [2022-07-19 21:34:21,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:34:21,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:21,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:21,328 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:21,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:34:21,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:34:21,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:21,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:34:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:21,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:21,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835663529] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:21,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:21,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-19 21:34:21,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217763972] [2022-07-19 21:34:21,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:21,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 21:34:21,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:21,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 21:34:21,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 21:34:21,948 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:34:21,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1016 transitions, 24077 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:21,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:21,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:34:21,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:23,817 INFO L129 PetriNetUnfolder]: 943/3672 cut-off events. [2022-07-19 21:34:23,817 INFO L130 PetriNetUnfolder]: For 83048/83079 co-relation queries the response was YES. [2022-07-19 21:34:23,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27053 conditions, 3672 events. 943/3672 cut-off events. For 83048/83079 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37023 event pairs, 126 based on Foata normal form. 5/3670 useless extension candidates. Maximal degree in co-relation 26927. Up to 1425 conditions per place. [2022-07-19 21:34:23,864 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 401 selfloop transitions, 597 changer transitions 6/1046 dead transitions. [2022-07-19 21:34:23,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 1046 transitions, 26512 flow [2022-07-19 21:34:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 21:34:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-19 21:34:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1775 transitions. [2022-07-19 21:34:23,866 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6232443820224719 [2022-07-19 21:34:23,866 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1775 transitions. [2022-07-19 21:34:23,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1775 transitions. [2022-07-19 21:34:23,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:23,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1775 transitions. [2022-07-19 21:34:23,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.46875) internal successors, (1775), 32 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:23,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:23,870 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:23,870 INFO L186 Difference]: Start difference. First operand has 608 places, 1016 transitions, 24077 flow. Second operand 32 states and 1775 transitions. [2022-07-19 21:34:23,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 1046 transitions, 26512 flow [2022-07-19 21:34:24,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 1046 transitions, 25991 flow, removed 31 selfloop flow, removed 21 redundant places. [2022-07-19 21:34:24,360 INFO L242 Difference]: Finished difference. Result has 619 places, 1024 transitions, 25538 flow [2022-07-19 21:34:24,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=23569, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=590, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=25538, PETRI_PLACES=619, PETRI_TRANSITIONS=1024} [2022-07-19 21:34:24,362 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 540 predicate places. [2022-07-19 21:34:24,362 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 1024 transitions, 25538 flow [2022-07-19 21:34:24,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:24,362 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:24,362 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, 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, 1, 1, 1, 1] [2022-07-19 21:34:24,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:24,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:24,579 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:24,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1050767011, now seen corresponding path program 15 times [2022-07-19 21:34:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:24,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189426800] [2022-07-19 21:34:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:24,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:24,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189426800] [2022-07-19 21:34:24,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189426800] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:24,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672332771] [2022-07-19 21:34:24,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:34:24,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:24,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:24,854 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:24,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 21:34:24,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:34:24,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:24,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:34:24,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:25,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:25,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672332771] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:25,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:25,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-19 21:34:25,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092440690] [2022-07-19 21:34:25,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:25,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 21:34:25,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:25,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 21:34:25,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 21:34:25,683 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:34:25,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 1024 transitions, 25538 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:25,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:25,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:34:25,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:28,100 INFO L129 PetriNetUnfolder]: 948/3631 cut-off events. [2022-07-19 21:34:28,100 INFO L130 PetriNetUnfolder]: For 90876/90905 co-relation queries the response was YES. [2022-07-19 21:34:28,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28227 conditions, 3631 events. 948/3631 cut-off events. For 90876/90905 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 36517 event pairs, 58 based on Foata normal form. 5/3631 useless extension candidates. Maximal degree in co-relation 28100. Up to 1109 conditions per place. [2022-07-19 21:34:28,177 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 386 selfloop transitions, 679 changer transitions 6/1113 dead transitions. [2022-07-19 21:34:28,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1113 transitions, 29047 flow [2022-07-19 21:34:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-19 21:34:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-07-19 21:34:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2789 transitions. [2022-07-19 21:34:28,205 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6267415730337078 [2022-07-19 21:34:28,206 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2789 transitions. [2022-07-19 21:34:28,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2789 transitions. [2022-07-19 21:34:28,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:28,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2789 transitions. [2022-07-19 21:34:28,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 55.78) internal successors, (2789), 50 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:28,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 89.0) internal successors, (4539), 51 states have internal predecessors, (4539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:28,212 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 89.0) internal successors, (4539), 51 states have internal predecessors, (4539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:28,212 INFO L186 Difference]: Start difference. First operand has 619 places, 1024 transitions, 25538 flow. Second operand 50 states and 2789 transitions. [2022-07-19 21:34:28,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1113 transitions, 29047 flow [2022-07-19 21:34:28,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 1113 transitions, 28854 flow, removed 23 selfloop flow, removed 20 redundant places. [2022-07-19 21:34:28,931 INFO L242 Difference]: Finished difference. Result has 654 places, 1053 transitions, 27975 flow [2022-07-19 21:34:28,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=25350, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=651, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=27975, PETRI_PLACES=654, PETRI_TRANSITIONS=1053} [2022-07-19 21:34:28,932 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 575 predicate places. [2022-07-19 21:34:28,933 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 1053 transitions, 27975 flow [2022-07-19 21:34:28,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:28,933 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:28,933 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, 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, 1, 1, 1, 1] [2022-07-19 21:34:28,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:29,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:29,149 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash -280113973, now seen corresponding path program 16 times [2022-07-19 21:34:29,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:29,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234286640] [2022-07-19 21:34:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:29,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:29,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234286640] [2022-07-19 21:34:29,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234286640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551409161] [2022-07-19 21:34:29,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:34:29,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:29,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:29,366 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:29,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 21:34:29,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:34:29,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:29,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:34:29,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:29,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:30,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551409161] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:30,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:30,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-19 21:34:30,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472078840] [2022-07-19 21:34:30,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:30,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 21:34:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:30,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 21:34:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 21:34:30,245 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:34:30,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 1053 transitions, 27975 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:30,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:30,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:34:30,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:34,226 INFO L129 PetriNetUnfolder]: 974/3757 cut-off events. [2022-07-19 21:34:34,227 INFO L130 PetriNetUnfolder]: For 107919/107935 co-relation queries the response was YES. [2022-07-19 21:34:34,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30543 conditions, 3757 events. 974/3757 cut-off events. For 107919/107935 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38146 event pairs, 88 based on Foata normal form. 4/3755 useless extension candidates. Maximal degree in co-relation 30410. Up to 1051 conditions per place. [2022-07-19 21:34:34,280 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 313 selfloop transitions, 822 changer transitions 12/1189 dead transitions. [2022-07-19 21:34:34,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 1189 transitions, 32469 flow [2022-07-19 21:34:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-19 21:34:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-19 21:34:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4796 transitions. [2022-07-19 21:34:34,318 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6193981660854966 [2022-07-19 21:34:34,318 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4796 transitions. [2022-07-19 21:34:34,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4796 transitions. [2022-07-19 21:34:34,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:34,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4796 transitions. [2022-07-19 21:34:34,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 55.12643678160919) internal successors, (4796), 87 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:34,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 89.0) internal successors, (7832), 88 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:34,327 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 89.0) internal successors, (7832), 88 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:34,327 INFO L186 Difference]: Start difference. First operand has 654 places, 1053 transitions, 27975 flow. Second operand 87 states and 4796 transitions. [2022-07-19 21:34:34,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 1189 transitions, 32469 flow [2022-07-19 21:34:34,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 1189 transitions, 32059 flow, removed 81 selfloop flow, removed 20 redundant places. [2022-07-19 21:34:34,968 INFO L242 Difference]: Finished difference. Result has 734 places, 1117 transitions, 31519 flow [2022-07-19 21:34:34,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=27617, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=766, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=31519, PETRI_PLACES=734, PETRI_TRANSITIONS=1117} [2022-07-19 21:34:34,970 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 655 predicate places. [2022-07-19 21:34:34,970 INFO L495 AbstractCegarLoop]: Abstraction has has 734 places, 1117 transitions, 31519 flow [2022-07-19 21:34:34,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:34,970 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:34,970 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, 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, 1, 1, 1, 1] [2022-07-19 21:34:34,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:35,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 21:34:35,189 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:35,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1771949071, now seen corresponding path program 17 times [2022-07-19 21:34:35,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:35,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949271099] [2022-07-19 21:34:35,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:35,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:35,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:35,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949271099] [2022-07-19 21:34:35,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949271099] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:35,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731423348] [2022-07-19 21:34:35,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:34:35,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:35,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:35,425 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:35,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 21:34:35,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:34:35,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:34:35,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:35,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:36,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731423348] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:36,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:36,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-19 21:34:36,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126870022] [2022-07-19 21:34:36,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:36,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 21:34:36,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:36,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 21:34:36,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 21:34:36,084 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:34:36,085 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 1117 transitions, 31519 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:36,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:36,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:34:36,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:38,037 INFO L129 PetriNetUnfolder]: 974/3694 cut-off events. [2022-07-19 21:34:38,037 INFO L130 PetriNetUnfolder]: For 131119/131137 co-relation queries the response was YES. [2022-07-19 21:34:38,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32931 conditions, 3694 events. 974/3694 cut-off events. For 131119/131137 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 37307 event pairs, 103 based on Foata normal form. 3/3673 useless extension candidates. Maximal degree in co-relation 32785. Up to 1272 conditions per place. [2022-07-19 21:34:38,091 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 504 selfloop transitions, 591 changer transitions 6/1143 dead transitions. [2022-07-19 21:34:38,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 1143 transitions, 34130 flow [2022-07-19 21:34:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 21:34:38,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-19 21:34:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1445 transitions. [2022-07-19 21:34:38,093 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6244598098530683 [2022-07-19 21:34:38,093 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1445 transitions. [2022-07-19 21:34:38,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1445 transitions. [2022-07-19 21:34:38,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:38,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1445 transitions. [2022-07-19 21:34:38,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.57692307692308) internal successors, (1445), 26 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:38,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:38,096 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:38,096 INFO L186 Difference]: Start difference. First operand has 734 places, 1117 transitions, 31519 flow. Second operand 26 states and 1445 transitions. [2022-07-19 21:34:38,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 1143 transitions, 34130 flow [2022-07-19 21:34:38,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 1143 transitions, 32991 flow, removed 240 selfloop flow, removed 44 redundant places. [2022-07-19 21:34:38,997 INFO L242 Difference]: Finished difference. Result has 716 places, 1123 transitions, 32239 flow [2022-07-19 21:34:38,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=30406, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=585, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=32239, PETRI_PLACES=716, PETRI_TRANSITIONS=1123} [2022-07-19 21:34:38,999 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 637 predicate places. [2022-07-19 21:34:38,999 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 1123 transitions, 32239 flow [2022-07-19 21:34:38,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:38,999 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:38,999 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, 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, 1, 1, 1, 1] [2022-07-19 21:34:39,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:39,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:39,216 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1738791515, now seen corresponding path program 18 times [2022-07-19 21:34:39,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:39,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964212117] [2022-07-19 21:34:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:39,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:39,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:39,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964212117] [2022-07-19 21:34:39,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964212117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:39,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620575076] [2022-07-19 21:34:39,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:34:39,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:39,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:39,499 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:39,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 21:34:39,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:34:39,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:39,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:34:39,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:39,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:40,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620575076] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:40,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:40,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-19 21:34:40,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834169480] [2022-07-19 21:34:40,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:40,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 21:34:40,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 21:34:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 21:34:40,320 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:34:40,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 716 places, 1123 transitions, 32239 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:40,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:40,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:34:40,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:44,919 INFO L129 PetriNetUnfolder]: 1038/3918 cut-off events. [2022-07-19 21:34:44,919 INFO L130 PetriNetUnfolder]: For 147623/147654 co-relation queries the response was YES. [2022-07-19 21:34:44,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35029 conditions, 3918 events. 1038/3918 cut-off events. For 147623/147654 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 39885 event pairs, 75 based on Foata normal form. 5/3917 useless extension candidates. Maximal degree in co-relation 34886. Up to 991 conditions per place. [2022-07-19 21:34:44,975 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 328 selfloop transitions, 912 changer transitions 6/1288 dead transitions. [2022-07-19 21:34:44,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 1288 transitions, 37868 flow [2022-07-19 21:34:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-19 21:34:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-07-19 21:34:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 5355 transitions. [2022-07-19 21:34:44,996 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6202942198540484 [2022-07-19 21:34:44,996 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 5355 transitions. [2022-07-19 21:34:44,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 5355 transitions. [2022-07-19 21:34:44,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:45,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 5355 transitions. [2022-07-19 21:34:45,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 55.20618556701031) internal successors, (5355), 97 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:45,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 89.0) internal successors, (8722), 98 states have internal predecessors, (8722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:45,024 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 89.0) internal successors, (8722), 98 states have internal predecessors, (8722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:45,024 INFO L186 Difference]: Start difference. First operand has 716 places, 1123 transitions, 32239 flow. Second operand 97 states and 5355 transitions. [2022-07-19 21:34:45,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 1288 transitions, 37868 flow [2022-07-19 21:34:45,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 792 places, 1288 transitions, 37287 flow, removed 29 selfloop flow, removed 17 redundant places. [2022-07-19 21:34:45,930 INFO L242 Difference]: Finished difference. Result has 803 places, 1209 transitions, 36217 flow [2022-07-19 21:34:45,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=31704, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=36217, PETRI_PLACES=803, PETRI_TRANSITIONS=1209} [2022-07-19 21:34:45,932 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 724 predicate places. [2022-07-19 21:34:45,932 INFO L495 AbstractCegarLoop]: Abstraction has has 803 places, 1209 transitions, 36217 flow [2022-07-19 21:34:45,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:45,933 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:45,933 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, 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, 1, 1, 1, 1] [2022-07-19 21:34:45,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-19 21:34:46,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:46,148 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:46,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1738018965, now seen corresponding path program 19 times [2022-07-19 21:34:46,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:46,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096126600] [2022-07-19 21:34:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:46,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:46,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096126600] [2022-07-19 21:34:46,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096126600] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464910095] [2022-07-19 21:34:46,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:34:46,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:46,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:46,386 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:46,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 21:34:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:46,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:34:46,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:46,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:47,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464910095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:47,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:47,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-19 21:34:47,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432310675] [2022-07-19 21:34:47,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:47,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 21:34:47,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 21:34:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 21:34:47,151 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:34:47,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 803 places, 1209 transitions, 36217 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:47,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:47,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:34:47,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:51,333 INFO L129 PetriNetUnfolder]: 1258/4504 cut-off events. [2022-07-19 21:34:51,334 INFO L130 PetriNetUnfolder]: For 182484/182502 co-relation queries the response was YES. [2022-07-19 21:34:51,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41620 conditions, 4504 events. 1258/4504 cut-off events. For 182484/182502 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 46297 event pairs, 108 based on Foata normal form. 3/4502 useless extension candidates. Maximal degree in co-relation 41468. Up to 1065 conditions per place. [2022-07-19 21:34:51,402 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 466 selfloop transitions, 955 changer transitions 6/1469 dead transitions. [2022-07-19 21:34:51,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 858 places, 1469 transitions, 44672 flow [2022-07-19 21:34:51,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-19 21:34:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-19 21:34:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3541 transitions. [2022-07-19 21:34:51,404 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6315320135544855 [2022-07-19 21:34:51,404 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3541 transitions. [2022-07-19 21:34:51,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3541 transitions. [2022-07-19 21:34:51,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:51,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3541 transitions. [2022-07-19 21:34:51,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 56.20634920634921) internal successors, (3541), 63 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:51,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 89.0) internal successors, (5696), 64 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:51,410 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 89.0) internal successors, (5696), 64 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:51,410 INFO L186 Difference]: Start difference. First operand has 803 places, 1209 transitions, 36217 flow. Second operand 63 states and 3541 transitions. [2022-07-19 21:34:51,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 858 places, 1469 transitions, 44672 flow [2022-07-19 21:34:52,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 1469 transitions, 43816 flow, removed 213 selfloop flow, removed 48 redundant places. [2022-07-19 21:34:52,594 INFO L242 Difference]: Finished difference. Result has 821 places, 1376 transitions, 42784 flow [2022-07-19 21:34:52,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=35381, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=797, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=42784, PETRI_PLACES=821, PETRI_TRANSITIONS=1376} [2022-07-19 21:34:52,596 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 742 predicate places. [2022-07-19 21:34:52,596 INFO L495 AbstractCegarLoop]: Abstraction has has 821 places, 1376 transitions, 42784 flow [2022-07-19 21:34:52,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:52,596 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:52,596 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:52,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:52,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:52,812 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:52,813 INFO L85 PathProgramCache]: Analyzing trace with hash -958803233, now seen corresponding path program 1 times [2022-07-19 21:34:52,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:52,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016526415] [2022-07-19 21:34:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:52,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:52,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:52,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016526415] [2022-07-19 21:34:52,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016526415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:52,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290035115] [2022-07-19 21:34:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:52,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:52,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:52,997 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:52,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 21:34:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:53,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 21:34:53,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:53,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:53,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290035115] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:53,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:53,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-07-19 21:34:53,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687556439] [2022-07-19 21:34:53,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:53,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 21:34:53,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 21:34:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 21:34:53,645 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-07-19 21:34:53,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 1376 transitions, 42784 flow. Second operand has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:53,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:53,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-07-19 21:34:53,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:57,352 INFO L129 PetriNetUnfolder]: 1475/4935 cut-off events. [2022-07-19 21:34:57,352 INFO L130 PetriNetUnfolder]: For 217916/217944 co-relation queries the response was YES. [2022-07-19 21:34:57,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48131 conditions, 4935 events. 1475/4935 cut-off events. For 217916/217944 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 50390 event pairs, 214 based on Foata normal form. 14/4927 useless extension candidates. Maximal degree in co-relation 47970. Up to 1108 conditions per place. [2022-07-19 21:34:57,530 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 566 selfloop transitions, 909 changer transitions 27/1543 dead transitions. [2022-07-19 21:34:57,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 867 places, 1543 transitions, 49144 flow [2022-07-19 21:34:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 21:34:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-19 21:34:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3010 transitions. [2022-07-19 21:34:57,533 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.626300457761132 [2022-07-19 21:34:57,533 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3010 transitions. [2022-07-19 21:34:57,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3010 transitions. [2022-07-19 21:34:57,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:57,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3010 transitions. [2022-07-19 21:34:57,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 55.74074074074074) internal successors, (3010), 54 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:57,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:57,538 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:57,538 INFO L186 Difference]: Start difference. First operand has 821 places, 1376 transitions, 42784 flow. Second operand 54 states and 3010 transitions. [2022-07-19 21:34:57,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 867 places, 1543 transitions, 49144 flow [2022-07-19 21:34:58,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 837 places, 1543 transitions, 47864 flow, removed 182 selfloop flow, removed 30 redundant places. [2022-07-19 21:34:58,925 INFO L242 Difference]: Finished difference. Result has 860 places, 1424 transitions, 45757 flow [2022-07-19 21:34:58,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=41598, PETRI_DIFFERENCE_MINUEND_PLACES=784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=858, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=45757, PETRI_PLACES=860, PETRI_TRANSITIONS=1424} [2022-07-19 21:34:58,927 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 781 predicate places. [2022-07-19 21:34:58,927 INFO L495 AbstractCegarLoop]: Abstraction has has 860 places, 1424 transitions, 45757 flow [2022-07-19 21:34:58,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:58,927 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:58,927 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 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] [2022-07-19 21:34:58,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:59,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 21:34:59,133 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1067754541, now seen corresponding path program 20 times [2022-07-19 21:34:59,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:59,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737523064] [2022-07-19 21:34:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:59,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:59,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:59,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737523064] [2022-07-19 21:34:59,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737523064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:59,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290546508] [2022-07-19 21:34:59,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:34:59,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:59,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:59,377 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:59,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 21:34:59,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:34:59,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 21:34:59,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:59,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:35:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:00,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290546508] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:35:00,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:35:00,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-07-19 21:35:00,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055985233] [2022-07-19 21:35:00,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:35:00,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 21:35:00,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:35:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 21:35:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 21:35:00,486 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:35:00,487 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 860 places, 1424 transitions, 45757 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:00,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:35:00,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:35:00,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:35:04,975 INFO L129 PetriNetUnfolder]: 1422/4976 cut-off events. [2022-07-19 21:35:04,975 INFO L130 PetriNetUnfolder]: For 249357/249379 co-relation queries the response was YES. [2022-07-19 21:35:05,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51987 conditions, 4976 events. 1422/4976 cut-off events. For 249357/249379 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 51107 event pairs, 81 based on Foata normal form. 32/4987 useless extension candidates. Maximal degree in co-relation 51810. Up to 786 conditions per place. [2022-07-19 21:35:05,064 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 479 selfloop transitions, 1093 changer transitions 18/1633 dead transitions. [2022-07-19 21:35:05,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 919 places, 1633 transitions, 55107 flow [2022-07-19 21:35:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-19 21:35:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-07-19 21:35:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4296 transitions. [2022-07-19 21:35:05,066 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6268787392382899 [2022-07-19 21:35:05,066 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4296 transitions. [2022-07-19 21:35:05,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4296 transitions. [2022-07-19 21:35:05,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:35:05,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4296 transitions. [2022-07-19 21:35:05,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 55.79220779220779) internal successors, (4296), 77 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:05,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 89.0) internal successors, (6942), 78 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:05,074 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 89.0) internal successors, (6942), 78 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:05,074 INFO L186 Difference]: Start difference. First operand has 860 places, 1424 transitions, 45757 flow. Second operand 77 states and 4296 transitions. [2022-07-19 21:35:05,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 919 places, 1633 transitions, 55107 flow [2022-07-19 21:35:06,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 895 places, 1633 transitions, 54294 flow, removed 121 selfloop flow, removed 24 redundant places. [2022-07-19 21:35:06,714 INFO L242 Difference]: Finished difference. Result has 911 places, 1514 transitions, 51392 flow [2022-07-19 21:35:06,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=45107, PETRI_DIFFERENCE_MINUEND_PLACES=819, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=51392, PETRI_PLACES=911, PETRI_TRANSITIONS=1514} [2022-07-19 21:35:06,715 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 832 predicate places. [2022-07-19 21:35:06,715 INFO L495 AbstractCegarLoop]: Abstraction has has 911 places, 1514 transitions, 51392 flow [2022-07-19 21:35:06,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:06,716 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:35:06,716 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 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] [2022-07-19 21:35:06,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 21:35:06,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-19 21:35:06,920 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:35:06,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:35:06,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1145489427, now seen corresponding path program 21 times [2022-07-19 21:35:06,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:35:06,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532317721] [2022-07-19 21:35:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:35:06,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:35:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:35:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:07,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:35:07,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532317721] [2022-07-19 21:35:07,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532317721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:35:07,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571463164] [2022-07-19 21:35:07,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:35:07,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:07,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:35:07,234 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:35:07,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 21:35:07,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:35:07,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:35:07,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 21:35:07,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:35:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:07,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:35:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:08,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571463164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:35:08,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:35:08,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-19 21:35:08,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16328167] [2022-07-19 21:35:08,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:35:08,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 21:35:08,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:35:08,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 21:35:08,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1768, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 21:35:08,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:35:08,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 1514 transitions, 51392 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:08,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:35:08,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:35:08,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:35:14,453 INFO L129 PetriNetUnfolder]: 1516/5294 cut-off events. [2022-07-19 21:35:14,454 INFO L130 PetriNetUnfolder]: For 291069/291091 co-relation queries the response was YES. [2022-07-19 21:35:14,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57200 conditions, 5294 events. 1516/5294 cut-off events. For 291069/291091 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 54830 event pairs, 93 based on Foata normal form. 15/5287 useless extension candidates. Maximal degree in co-relation 57016. Up to 808 conditions per place. [2022-07-19 21:35:14,564 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 616 selfloop transitions, 1139 changer transitions 13/1811 dead transitions. [2022-07-19 21:35:14,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 1811 transitions, 62960 flow [2022-07-19 21:35:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:35:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:35:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 5231 transitions. [2022-07-19 21:35:14,575 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6319922677298538 [2022-07-19 21:35:14,575 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 5231 transitions. [2022-07-19 21:35:14,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 5231 transitions. [2022-07-19 21:35:14,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:35:14,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 5231 transitions. [2022-07-19 21:35:14,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 56.24731182795699) internal successors, (5231), 93 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:14,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 89.0) internal successors, (8366), 94 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:14,584 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 89.0) internal successors, (8366), 94 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:14,585 INFO L186 Difference]: Start difference. First operand has 911 places, 1514 transitions, 51392 flow. Second operand 93 states and 5231 transitions. [2022-07-19 21:35:14,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 1811 transitions, 62960 flow [2022-07-19 21:35:16,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 961 places, 1811 transitions, 61411 flow, removed 341 selfloop flow, removed 35 redundant places. [2022-07-19 21:35:16,748 INFO L242 Difference]: Finished difference. Result has 988 places, 1630 transitions, 57509 flow [2022-07-19 21:35:16,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=50170, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=57509, PETRI_PLACES=988, PETRI_TRANSITIONS=1630} [2022-07-19 21:35:16,750 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 909 predicate places. [2022-07-19 21:35:16,750 INFO L495 AbstractCegarLoop]: Abstraction has has 988 places, 1630 transitions, 57509 flow [2022-07-19 21:35:16,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:16,751 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:35:16,751 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 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] [2022-07-19 21:35:16,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 21:35:16,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-19 21:35:16,968 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:35:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:35:16,968 INFO L85 PathProgramCache]: Analyzing trace with hash 491254805, now seen corresponding path program 22 times [2022-07-19 21:35:16,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:35:16,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003126733] [2022-07-19 21:35:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:35:16,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:35:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:35:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:17,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:35:17,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003126733] [2022-07-19 21:35:17,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003126733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:35:17,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167053066] [2022-07-19 21:35:17,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:35:17,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:35:17,241 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:35:17,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 21:35:17,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:35:17,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:35:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 21:35:17,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:35:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:17,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:35:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:18,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167053066] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:35:18,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:35:18,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-19 21:35:18,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038011940] [2022-07-19 21:35:18,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:35:18,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 21:35:18,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:35:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 21:35:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1773, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 21:35:18,164 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:35:18,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 988 places, 1630 transitions, 57509 flow. Second operand has 45 states, 45 states have (on average 53.644444444444446) internal successors, (2414), 45 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:18,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:35:18,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:35:18,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:35:25,183 INFO L129 PetriNetUnfolder]: 1679/5782 cut-off events. [2022-07-19 21:35:25,183 INFO L130 PetriNetUnfolder]: For 402967/402980 co-relation queries the response was YES. [2022-07-19 21:35:25,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68145 conditions, 5782 events. 1679/5782 cut-off events. For 402967/402980 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 60759 event pairs, 100 based on Foata normal form. 12/5768 useless extension candidates. Maximal degree in co-relation 67942. Up to 943 conditions per place. [2022-07-19 21:35:25,394 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 541 selfloop transitions, 1341 changer transitions 12/1937 dead transitions. [2022-07-19 21:35:25,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1088 places, 1937 transitions, 71643 flow [2022-07-19 21:35:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-07-19 21:35:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-07-19 21:35:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5929 transitions. [2022-07-19 21:35:25,398 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6225979208232699 [2022-07-19 21:35:25,398 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5929 transitions. [2022-07-19 21:35:25,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5929 transitions. [2022-07-19 21:35:25,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:35:25,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5929 transitions. [2022-07-19 21:35:25,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 55.41121495327103) internal successors, (5929), 107 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:25,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:25,407 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:25,407 INFO L186 Difference]: Start difference. First operand has 988 places, 1630 transitions, 57509 flow. Second operand 107 states and 5929 transitions. [2022-07-19 21:35:25,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1088 places, 1937 transitions, 71643 flow [2022-07-19 21:35:28,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1028 places, 1937 transitions, 68842 flow, removed 361 selfloop flow, removed 60 redundant places. [2022-07-19 21:35:28,137 INFO L242 Difference]: Finished difference. Result has 1051 places, 1813 transitions, 65986 flow [2022-07-19 21:35:28,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=54993, PETRI_DIFFERENCE_MINUEND_PLACES=922, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=65986, PETRI_PLACES=1051, PETRI_TRANSITIONS=1813} [2022-07-19 21:35:28,139 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 972 predicate places. [2022-07-19 21:35:28,139 INFO L495 AbstractCegarLoop]: Abstraction has has 1051 places, 1813 transitions, 65986 flow [2022-07-19 21:35:28,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.644444444444446) internal successors, (2414), 45 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:28,140 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:35:28,140 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 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] [2022-07-19 21:35:28,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 21:35:28,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:28,356 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:35:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:35:28,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1756563129, now seen corresponding path program 23 times [2022-07-19 21:35:28,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:35:28,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881030789] [2022-07-19 21:35:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:35:28,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:35:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:35:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:28,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:35:28,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881030789] [2022-07-19 21:35:28,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881030789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:35:28,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723790185] [2022-07-19 21:35:28,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:35:28,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:28,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:35:28,634 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:35:28,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 21:35:28,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:35:28,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:35:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 21:35:28,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:35:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:29,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:35:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:29,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723790185] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:35:29,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:35:29,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-19 21:35:29,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428330109] [2022-07-19 21:35:29,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:35:29,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 21:35:29,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:35:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 21:35:29,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 21:35:29,588 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:35:29,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1051 places, 1813 transitions, 65986 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:29,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:35:29,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:35:29,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:35:39,188 INFO L129 PetriNetUnfolder]: 1852/6339 cut-off events. [2022-07-19 21:35:39,188 INFO L130 PetriNetUnfolder]: For 460600/460613 co-relation queries the response was YES. [2022-07-19 21:35:39,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76675 conditions, 6339 events. 1852/6339 cut-off events. For 460600/460613 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 67323 event pairs, 93 based on Foata normal form. 12/6332 useless extension candidates. Maximal degree in co-relation 76465. Up to 1094 conditions per place. [2022-07-19 21:35:39,434 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 560 selfloop transitions, 1583 changer transitions 12/2198 dead transitions. [2022-07-19 21:35:39,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1184 places, 2198 transitions, 82820 flow [2022-07-19 21:35:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-07-19 21:35:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2022-07-19 21:35:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 7779 transitions. [2022-07-19 21:35:39,438 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6243178170144462 [2022-07-19 21:35:39,438 INFO L72 ComplementDD]: Start complementDD. Operand 140 states and 7779 transitions. [2022-07-19 21:35:39,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 140 states and 7779 transitions. [2022-07-19 21:35:39,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:35:39,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 140 states and 7779 transitions. [2022-07-19 21:35:39,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 141 states, 140 states have (on average 55.56428571428572) internal successors, (7779), 140 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:39,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:39,451 INFO L81 ComplementDD]: Finished complementDD. Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:39,451 INFO L186 Difference]: Start difference. First operand has 1051 places, 1813 transitions, 65986 flow. Second operand 140 states and 7779 transitions. [2022-07-19 21:35:39,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1184 places, 2198 transitions, 82820 flow [2022-07-19 21:35:42,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1147 places, 2198 transitions, 79762 flow, removed 210 selfloop flow, removed 37 redundant places. [2022-07-19 21:35:42,833 INFO L242 Difference]: Finished difference. Result has 1175 places, 2013 transitions, 75496 flow [2022-07-19 21:35:42,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=63359, PETRI_DIFFERENCE_MINUEND_PLACES=1008, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=140, PETRI_FLOW=75496, PETRI_PLACES=1175, PETRI_TRANSITIONS=2013} [2022-07-19 21:35:42,835 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1096 predicate places. [2022-07-19 21:35:42,835 INFO L495 AbstractCegarLoop]: Abstraction has has 1175 places, 2013 transitions, 75496 flow [2022-07-19 21:35:42,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:42,835 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:35:42,835 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 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] [2022-07-19 21:35:42,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 21:35:43,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:43,051 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:35:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:35:43,052 INFO L85 PathProgramCache]: Analyzing trace with hash -584407551, now seen corresponding path program 24 times [2022-07-19 21:35:43,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:35:43,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30988765] [2022-07-19 21:35:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:35:43,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:35:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:35:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:43,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:35:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30988765] [2022-07-19 21:35:43,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30988765] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:35:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987903591] [2022-07-19 21:35:43,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:35:43,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:43,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:35:43,284 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:35:43,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 21:35:43,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-19 21:35:43,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:35:43,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 21:35:43,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:35:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:43,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:35:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:44,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987903591] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:35:44,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:35:44,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-07-19 21:35:44,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298064234] [2022-07-19 21:35:44,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:35:44,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 21:35:44,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:35:44,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 21:35:44,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 21:35:44,364 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:35:44,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1175 places, 2013 transitions, 75496 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:44,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:35:44,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:35:44,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:36:00,204 INFO L129 PetriNetUnfolder]: 2052/7011 cut-off events. [2022-07-19 21:36:00,204 INFO L130 PetriNetUnfolder]: For 548595/548608 co-relation queries the response was YES. [2022-07-19 21:36:00,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86340 conditions, 7011 events. 2052/7011 cut-off events. For 548595/548608 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 75700 event pairs, 76 based on Foata normal form. 12/7008 useless extension candidates. Maximal degree in co-relation 86111. Up to 1196 conditions per place. [2022-07-19 21:36:00,366 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 502 selfloop transitions, 1974 changer transitions 13/2532 dead transitions. [2022-07-19 21:36:00,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1408 places, 2532 transitions, 95276 flow [2022-07-19 21:36:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2022-07-19 21:36:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2022-07-19 21:36:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 13314 transitions. [2022-07-19 21:36:00,387 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.623314606741573 [2022-07-19 21:36:00,388 INFO L72 ComplementDD]: Start complementDD. Operand 240 states and 13314 transitions. [2022-07-19 21:36:00,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 240 states and 13314 transitions. [2022-07-19 21:36:00,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:36:00,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 240 states and 13314 transitions. [2022-07-19 21:36:00,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 241 states, 240 states have (on average 55.475) internal successors, (13314), 240 states have internal predecessors, (13314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:00,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 241 states, 241 states have (on average 89.0) internal successors, (21449), 241 states have internal predecessors, (21449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:00,443 INFO L81 ComplementDD]: Finished complementDD. Result has 241 states, 241 states have (on average 89.0) internal successors, (21449), 241 states have internal predecessors, (21449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:00,443 INFO L186 Difference]: Start difference. First operand has 1175 places, 2013 transitions, 75496 flow. Second operand 240 states and 13314 transitions. [2022-07-19 21:36:00,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1408 places, 2532 transitions, 95276 flow [2022-07-19 21:36:05,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1351 places, 2532 transitions, 93348 flow, removed 450 selfloop flow, removed 57 redundant places. [2022-07-19 21:36:05,191 INFO L242 Difference]: Finished difference. Result has 1384 places, 2276 transitions, 88743 flow [2022-07-19 21:36:05,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=73818, PETRI_DIFFERENCE_MINUEND_PLACES=1112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=240, PETRI_FLOW=88743, PETRI_PLACES=1384, PETRI_TRANSITIONS=2276} [2022-07-19 21:36:05,194 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1305 predicate places. [2022-07-19 21:36:05,194 INFO L495 AbstractCegarLoop]: Abstraction has has 1384 places, 2276 transitions, 88743 flow [2022-07-19 21:36:05,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:05,194 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:36:05,194 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 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] [2022-07-19 21:36:05,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 21:36:05,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-19 21:36:05,412 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:36:05,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:36:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1538828033, now seen corresponding path program 25 times [2022-07-19 21:36:05,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:36:05,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815696268] [2022-07-19 21:36:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:05,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:36:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:05,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:36:05,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815696268] [2022-07-19 21:36:05,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815696268] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:36:05,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113734148] [2022-07-19 21:36:05,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:36:05,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:36:05,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:36:05,639 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:36:05,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 21:36:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:05,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 21:36:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:36:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:06,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:36:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:06,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113734148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:36:06,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:36:06,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-19 21:36:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829993974] [2022-07-19 21:36:06,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:36:06,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 21:36:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:36:06,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 21:36:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1774, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 21:36:06,474 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:36:06,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1384 places, 2276 transitions, 88743 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:06,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:36:06,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:36:06,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:36:16,834 INFO L129 PetriNetUnfolder]: 2269/7606 cut-off events. [2022-07-19 21:36:16,834 INFO L130 PetriNetUnfolder]: For 747642/747664 co-relation queries the response was YES. [2022-07-19 21:36:17,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102545 conditions, 7606 events. 2269/7606 cut-off events. For 747642/747664 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 83009 event pairs, 141 based on Foata normal form. 14/7584 useless extension candidates. Maximal degree in co-relation 102292. Up to 1353 conditions per place. [2022-07-19 21:36:17,092 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 714 selfloop transitions, 1864 changer transitions 12/2633 dead transitions. [2022-07-19 21:36:17,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1499 places, 2633 transitions, 108467 flow [2022-07-19 21:36:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-07-19 21:36:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2022-07-19 21:36:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 6759 transitions. [2022-07-19 21:36:17,111 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6224903297108123 [2022-07-19 21:36:17,112 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 6759 transitions. [2022-07-19 21:36:17,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 6759 transitions. [2022-07-19 21:36:17,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:36:17,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 6759 transitions. [2022-07-19 21:36:17,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 55.40163934426229) internal successors, (6759), 122 states have internal predecessors, (6759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:17,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:17,123 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:17,123 INFO L186 Difference]: Start difference. First operand has 1384 places, 2276 transitions, 88743 flow. Second operand 122 states and 6759 transitions. [2022-07-19 21:36:17,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1499 places, 2633 transitions, 108467 flow [2022-07-19 21:36:23,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1385 places, 2633 transitions, 105000 flow, removed 709 selfloop flow, removed 114 redundant places. [2022-07-19 21:36:23,660 INFO L242 Difference]: Finished difference. Result has 1408 places, 2518 transitions, 101963 flow [2022-07-19 21:36:23,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=85583, PETRI_DIFFERENCE_MINUEND_PLACES=1264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=101963, PETRI_PLACES=1408, PETRI_TRANSITIONS=2518} [2022-07-19 21:36:23,662 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1329 predicate places. [2022-07-19 21:36:23,662 INFO L495 AbstractCegarLoop]: Abstraction has has 1408 places, 2518 transitions, 101963 flow [2022-07-19 21:36:23,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:23,663 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:36:23,663 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 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] [2022-07-19 21:36:23,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 21:36:23,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-19 21:36:23,880 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:36:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:36:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1411712641, now seen corresponding path program 26 times [2022-07-19 21:36:23,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:36:23,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180110561] [2022-07-19 21:36:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:23,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:36:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:24,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:36:24,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180110561] [2022-07-19 21:36:24,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180110561] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:36:24,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476795761] [2022-07-19 21:36:24,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:36:24,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:36:24,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:36:24,130 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:36:24,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 21:36:24,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:36:24,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:36:24,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 21:36:24,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:36:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:24,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:36:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:25,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476795761] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:36:25,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:36:25,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-19 21:36:25,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472369899] [2022-07-19 21:36:25,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:36:25,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 21:36:25,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:36:25,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 21:36:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 21:36:25,082 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:36:25,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1408 places, 2518 transitions, 101963 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:25,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:36:25,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:36:25,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:36:38,765 INFO L129 PetriNetUnfolder]: 2505/8363 cut-off events. [2022-07-19 21:36:38,765 INFO L130 PetriNetUnfolder]: For 857566/857579 co-relation queries the response was YES. [2022-07-19 21:36:38,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115720 conditions, 8363 events. 2505/8363 cut-off events. For 857566/857579 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 92525 event pairs, 94 based on Foata normal form. 12/8368 useless extension candidates. Maximal degree in co-relation 115460. Up to 1475 conditions per place. [2022-07-19 21:36:38,997 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 677 selfloop transitions, 2270 changer transitions 12/3002 dead transitions. [2022-07-19 21:36:38,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1569 places, 3002 transitions, 125549 flow [2022-07-19 21:36:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-07-19 21:36:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2022-07-19 21:36:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 9368 transitions. [2022-07-19 21:36:39,003 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6265382557517389 [2022-07-19 21:36:39,003 INFO L72 ComplementDD]: Start complementDD. Operand 168 states and 9368 transitions. [2022-07-19 21:36:39,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 168 states and 9368 transitions. [2022-07-19 21:36:39,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:36:39,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 168 states and 9368 transitions. [2022-07-19 21:36:39,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 169 states, 168 states have (on average 55.76190476190476) internal successors, (9368), 168 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:39,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:39,128 INFO L81 ComplementDD]: Finished complementDD. Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:39,128 INFO L186 Difference]: Start difference. First operand has 1408 places, 2518 transitions, 101963 flow. Second operand 168 states and 9368 transitions. [2022-07-19 21:36:39,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1569 places, 3002 transitions, 125549 flow [2022-07-19 21:36:47,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1522 places, 3002 transitions, 123241 flow, removed 289 selfloop flow, removed 47 redundant places. [2022-07-19 21:36:47,237 INFO L242 Difference]: Finished difference. Result has 1548 places, 2784 transitions, 117621 flow [2022-07-19 21:36:47,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=100080, PETRI_DIFFERENCE_MINUEND_PLACES=1355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=168, PETRI_FLOW=117621, PETRI_PLACES=1548, PETRI_TRANSITIONS=2784} [2022-07-19 21:36:47,240 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1469 predicate places. [2022-07-19 21:36:47,240 INFO L495 AbstractCegarLoop]: Abstraction has has 1548 places, 2784 transitions, 117621 flow [2022-07-19 21:36:47,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:47,240 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:36:47,241 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:36:47,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-19 21:36:47,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:36:47,456 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:36:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:36:47,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1519795649, now seen corresponding path program 2 times [2022-07-19 21:36:47,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:36:47,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913527983] [2022-07-19 21:36:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:47,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:36:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:47,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:36:47,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913527983] [2022-07-19 21:36:47,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913527983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:36:47,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526558116] [2022-07-19 21:36:47,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:36:47,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:36:47,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:36:47,643 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:36:47,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 21:36:47,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:36:47,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:36:47,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 21:36:47,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:36:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:48,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:36:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:48,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526558116] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:36:48,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:36:48,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2022-07-19 21:36:48,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167651649] [2022-07-19 21:36:48,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:36:48,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 21:36:48,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:36:48,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 21:36:48,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 21:36:48,503 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-07-19 21:36:48,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1548 places, 2784 transitions, 117621 flow. Second operand has 41 states, 41 states have (on average 52.75609756097561) internal successors, (2163), 41 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:48,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:36:48,504 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-07-19 21:36:48,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:37:00,040 INFO L129 PetriNetUnfolder]: 3075/9846 cut-off events. [2022-07-19 21:37:00,040 INFO L130 PetriNetUnfolder]: For 1101301/1101314 co-relation queries the response was YES. [2022-07-19 21:37:00,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137498 conditions, 9846 events. 3075/9846 cut-off events. For 1101301/1101314 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 110900 event pairs, 403 based on Foata normal form. 70/9888 useless extension candidates. Maximal degree in co-relation 137224. Up to 2747 conditions per place. [2022-07-19 21:37:00,298 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1207 selfloop transitions, 1767 changer transitions 65/3080 dead transitions. [2022-07-19 21:37:00,298 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1599 places, 3080 transitions, 134368 flow [2022-07-19 21:37:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-19 21:37:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-19 21:37:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3230 transitions. [2022-07-19 21:37:00,301 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.625726462611391 [2022-07-19 21:37:00,301 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3230 transitions. [2022-07-19 21:37:00,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3230 transitions. [2022-07-19 21:37:00,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:37:00,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3230 transitions. [2022-07-19 21:37:00,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 55.689655172413794) internal successors, (3230), 58 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:00,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 89.0) internal successors, (5251), 59 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:00,306 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 89.0) internal successors, (5251), 59 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:00,306 INFO L186 Difference]: Start difference. First operand has 1548 places, 2784 transitions, 117621 flow. Second operand 58 states and 3230 transitions. [2022-07-19 21:37:00,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1599 places, 3080 transitions, 134368 flow [2022-07-19 21:37:11,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1534 places, 3080 transitions, 131329 flow, removed 443 selfloop flow, removed 65 redundant places. [2022-07-19 21:37:11,611 INFO L242 Difference]: Finished difference. Result has 1546 places, 2878 transitions, 125339 flow [2022-07-19 21:37:11,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=114102, PETRI_DIFFERENCE_MINUEND_PLACES=1477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1645, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=125339, PETRI_PLACES=1546, PETRI_TRANSITIONS=2878} [2022-07-19 21:37:11,614 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1467 predicate places. [2022-07-19 21:37:11,614 INFO L495 AbstractCegarLoop]: Abstraction has has 1546 places, 2878 transitions, 125339 flow [2022-07-19 21:37:11,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 52.75609756097561) internal successors, (2163), 41 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:11,615 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:37:11,615 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 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] [2022-07-19 21:37:11,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-19 21:37:11,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:37:11,831 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:37:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:37:11,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1093495597, now seen corresponding path program 27 times [2022-07-19 21:37:11,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:37:11,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289518466] [2022-07-19 21:37:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:37:11,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:37:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:37:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:37:12,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:37:12,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289518466] [2022-07-19 21:37:12,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289518466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:37:12,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74844367] [2022-07-19 21:37:12,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:37:12,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:37:12,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:37:12,049 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:37:12,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 21:37:12,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:37:12,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:37:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 21:37:12,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:37:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:37:12,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:37:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:37:13,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74844367] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:37:13,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:37:13,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-07-19 21:37:13,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680387577] [2022-07-19 21:37:13,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:37:13,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 21:37:13,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:37:13,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 21:37:13,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 21:37:13,062 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-19 21:37:13,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1546 places, 2878 transitions, 125339 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:13,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:37:13,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-19 21:37:13,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:37:35,425 INFO L129 PetriNetUnfolder]: 2753/9273 cut-off events. [2022-07-19 21:37:35,425 INFO L130 PetriNetUnfolder]: For 1095559/1095572 co-relation queries the response was YES. [2022-07-19 21:37:35,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135444 conditions, 9273 events. 2753/9273 cut-off events. For 1095559/1095572 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 104659 event pairs, 87 based on Foata normal form. 13/9277 useless extension candidates. Maximal degree in co-relation 135166. Up to 1585 conditions per place. [2022-07-19 21:37:35,689 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 574 selfloop transitions, 2692 changer transitions 18/3327 dead transitions. [2022-07-19 21:37:35,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1791 places, 3327 transitions, 145264 flow [2022-07-19 21:37:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-07-19 21:37:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2022-07-19 21:37:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 14499 transitions. [2022-07-19 21:37:35,696 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6241766757070902 [2022-07-19 21:37:35,696 INFO L72 ComplementDD]: Start complementDD. Operand 261 states and 14499 transitions. [2022-07-19 21:37:35,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 261 states and 14499 transitions. [2022-07-19 21:37:35,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:37:35,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 261 states and 14499 transitions. [2022-07-19 21:37:35,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 262 states, 261 states have (on average 55.55172413793103) internal successors, (14499), 261 states have internal predecessors, (14499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:35,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 262 states, 262 states have (on average 89.0) internal successors, (23318), 262 states have internal predecessors, (23318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:35,722 INFO L81 ComplementDD]: Finished complementDD. Result has 262 states, 262 states have (on average 89.0) internal successors, (23318), 262 states have internal predecessors, (23318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:35,722 INFO L186 Difference]: Start difference. First operand has 1546 places, 2878 transitions, 125339 flow. Second operand 261 states and 14499 transitions. [2022-07-19 21:37:35,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1791 places, 3327 transitions, 145264 flow [2022-07-19 21:37:46,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1759 places, 3327 transitions, 144373 flow, removed 139 selfloop flow, removed 32 redundant places. [2022-07-19 21:37:46,117 INFO L242 Difference]: Finished difference. Result has 1789 places, 3042 transitions, 138328 flow [2022-07-19 21:37:46,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=124641, PETRI_DIFFERENCE_MINUEND_PLACES=1499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2533, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=261, PETRI_FLOW=138328, PETRI_PLACES=1789, PETRI_TRANSITIONS=3042} [2022-07-19 21:37:46,120 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1710 predicate places. [2022-07-19 21:37:46,120 INFO L495 AbstractCegarLoop]: Abstraction has has 1789 places, 3042 transitions, 138328 flow [2022-07-19 21:37:46,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:46,123 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:37:46,124 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:37:46,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-19 21:37:46,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:37:46,341 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:37:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:37:46,341 INFO L85 PathProgramCache]: Analyzing trace with hash -724600069, now seen corresponding path program 3 times [2022-07-19 21:37:46,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:37:46,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304195092] [2022-07-19 21:37:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:37:46,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:37:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:37:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:37:46,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:37:46,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304195092] [2022-07-19 21:37:46,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304195092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:37:46,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541735808] [2022-07-19 21:37:46,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:37:46,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:37:46,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:37:46,531 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:37:46,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-19 21:37:46,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:37:46,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:37:46,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 21:37:46,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:37:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:37:46,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:37:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:37:47,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541735808] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:37:47,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:37:47,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-07-19 21:37:47,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254896141] [2022-07-19 21:37:47,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:37:47,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 21:37:47,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:37:47,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 21:37:47,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 21:37:47,214 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-07-19 21:37:47,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1789 places, 3042 transitions, 138328 flow. Second operand has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:47,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:37:47,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-07-19 21:37:47,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand