./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 6c24879c 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-?-6c24879 [2022-07-12 10:31:06,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:31:06,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:31:06,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:31:06,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:31:06,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:31:06,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:31:06,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:31:06,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:31:06,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:31:06,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:31:06,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:31:06,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:31:06,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:31:06,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:31:06,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:31:06,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:31:06,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:31:06,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:31:07,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:31:07,001 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:31:07,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:31:07,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:31:07,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:31:07,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:31:07,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:31:07,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:31:07,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:31:07,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:31:07,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:31:07,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:31:07,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:31:07,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:31:07,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:31:07,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:31:07,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:31:07,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:31:07,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:31:07,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:31:07,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:31:07,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:31:07,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:31:07,016 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:31:07,042 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:31:07,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:31:07,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:31:07,044 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:31:07,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:31:07,045 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:31:07,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:31:07,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:31:07,046 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:31:07,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:31:07,046 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:31:07,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:31:07,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:31:07,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:31:07,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:31:07,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:31:07,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:31:07,048 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:31:07,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:31:07,049 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:31:07,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:31:07,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:31:07,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:31:07,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:31:07,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:31:07,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:31:07,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:31:07,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:31:07,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:31:07,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:31:07,051 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:31:07,051 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:31:07,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:31:07,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-07-12 10:31:07,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:31:07,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:31:07,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:31:07,252 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:31:07,253 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:31:07,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-07-12 10:31:07,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccefef5a/619ec287903b434a8ceff5dabb5ff91f/FLAG4e2e218c0 [2022-07-12 10:31:07,635 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:31:07,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-07-12 10:31:07,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccefef5a/619ec287903b434a8ceff5dabb5ff91f/FLAG4e2e218c0 [2022-07-12 10:31:07,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccefef5a/619ec287903b434a8ceff5dabb5ff91f [2022-07-12 10:31:07,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:31:07,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:31:07,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:31:07,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:31:07,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:31:07,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44acb11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07, skipping insertion in model container [2022-07-12 10:31:07,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:31:07,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:31:07,812 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] [2022-07-12 10:31:07,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:31:07,818 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:31:07,829 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] [2022-07-12 10:31:07,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:31:07,840 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:31:07,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07 WrapperNode [2022-07-12 10:31:07,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:31:07,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:31:07,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:31:07,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:31:07,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,866 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2022-07-12 10:31:07,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:31:07,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:31:07,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:31:07,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:31:07,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:31:07,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:31:07,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:31:07,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:31:07,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07" (1/1) ... [2022-07-12 10:31:07,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:31:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:07,921 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) [2022-07-12 10:31:07,935 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 [2022-07-12 10:31:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:31:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:31:07,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:31:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:31:07,959 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:31:07,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:31:07,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:31:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:31:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:31:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:31:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:31:07,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:31:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:31:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:31:07,961 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:31:08,019 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:31:08,020 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:31:08,158 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:31:08,180 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:31:08,181 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:31:08,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:31:08 BoogieIcfgContainer [2022-07-12 10:31:08,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:31:08,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:31:08,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:31:08,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:31:08,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:31:07" (1/3) ... [2022-07-12 10:31:08,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eebb87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:31:08, skipping insertion in model container [2022-07-12 10:31:08,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:07" (2/3) ... [2022-07-12 10:31:08,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eebb87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:31:08, skipping insertion in model container [2022-07-12 10:31:08,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:31:08" (3/3) ... [2022-07-12 10:31:08,188 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-07-12 10:31:08,192 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:31:08,197 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:31:08,197 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:31:08,197 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:31:08,230 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:31:08,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2022-07-12 10:31:08,290 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2022-07-12 10:31:08,291 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:31:08,293 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. [2022-07-12 10:31:08,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2022-07-12 10:31:08,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2022-07-12 10:31:08,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:31:08,308 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@12ff9d30, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1381b2fd [2022-07-12 10:31:08,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:31:08,336 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2022-07-12 10:31:08,336 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:31:08,337 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:08,337 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] [2022-07-12 10:31:08,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:08,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1515800342, now seen corresponding path program 1 times [2022-07-12 10:31:08,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:08,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798107851] [2022-07-12 10:31:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:08,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:08,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798107851] [2022-07-12 10:31:08,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798107851] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:08,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:08,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:31:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212532355] [2022-07-12 10:31:08,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:08,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:31:08,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:31:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:31:08,563 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2022-07-12 10:31:08,566 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) [2022-07-12 10:31:08,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:08,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2022-07-12 10:31:08,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:08,604 INFO L129 PetriNetUnfolder]: 11/107 cut-off events. [2022-07-12 10:31:08,615 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-12 10:31:08,617 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. [2022-07-12 10:31:08,620 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2022-07-12 10:31:08,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2022-07-12 10:31:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:31:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:31:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2022-07-12 10:31:08,632 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2022-07-12 10:31:08,633 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2022-07-12 10:31:08,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2022-07-12 10:31:08,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:08,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2022-07-12 10:31:08,640 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) [2022-07-12 10:31:08,642 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) [2022-07-12 10:31:08,642 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) [2022-07-12 10:31:08,643 INFO L186 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2022-07-12 10:31:08,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2022-07-12 10:31:08,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:31:08,648 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2022-07-12 10:31:08,649 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} [2022-07-12 10:31:08,651 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-07-12 10:31:08,651 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2022-07-12 10:31:08,652 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) [2022-07-12 10:31:08,652 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:08,652 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] [2022-07-12 10:31:08,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:31:08,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:08,653 INFO L85 PathProgramCache]: Analyzing trace with hash -79113043, now seen corresponding path program 1 times [2022-07-12 10:31:08,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:08,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517547918] [2022-07-12 10:31:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:08,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:09,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:09,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517547918] [2022-07-12 10:31:09,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517547918] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:09,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:09,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 10:31:09,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036734068] [2022-07-12 10:31:09,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:09,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:31:09,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:09,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:31:09,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:31:09,182 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-12 10:31:09,183 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) [2022-07-12 10:31:09,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:09,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-12 10:31:09,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:09,530 INFO L129 PetriNetUnfolder]: 67/248 cut-off events. [2022-07-12 10:31:09,531 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-12 10:31:09,531 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. [2022-07-12 10:31:09,533 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 11 changer transitions 6/103 dead transitions. [2022-07-12 10:31:09,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 337 flow [2022-07-12 10:31:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:31:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:31:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 698 transitions. [2022-07-12 10:31:09,547 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653558052434457 [2022-07-12 10:31:09,548 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 698 transitions. [2022-07-12 10:31:09,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 698 transitions. [2022-07-12 10:31:09,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:09,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 698 transitions. [2022-07-12 10:31:09,552 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) [2022-07-12 10:31:09,555 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) [2022-07-12 10:31:09,555 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) [2022-07-12 10:31:09,555 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 698 transitions. [2022-07-12 10:31:09,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 337 flow [2022-07-12 10:31:09,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:31:09,558 INFO L242 Difference]: Finished difference. Result has 92 places, 79 transitions, 213 flow [2022-07-12 10:31:09,558 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} [2022-07-12 10:31:09,558 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2022-07-12 10:31:09,559 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 213 flow [2022-07-12 10:31:09,559 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) [2022-07-12 10:31:09,559 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:09,559 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] [2022-07-12 10:31:09,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:31:09,560 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash -675229343, now seen corresponding path program 2 times [2022-07-12 10:31:09,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:09,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045121298] [2022-07-12 10:31:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:09,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:09,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:09,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045121298] [2022-07-12 10:31:09,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045121298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:09,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:09,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 10:31:09,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616258097] [2022-07-12 10:31:09,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:09,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:31:09,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:09,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:31:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:31:09,882 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-12 10:31:09,883 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) [2022-07-12 10:31:09,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:09,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-12 10:31:09,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:10,210 INFO L129 PetriNetUnfolder]: 68/263 cut-off events. [2022-07-12 10:31:10,211 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-07-12 10:31:10,213 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. [2022-07-12 10:31:10,214 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2022-07-12 10:31:10,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 429 flow [2022-07-12 10:31:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:31:10,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:31:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2022-07-12 10:31:10,216 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2022-07-12 10:31:10,216 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2022-07-12 10:31:10,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2022-07-12 10:31:10,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:10,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2022-07-12 10:31:10,218 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) [2022-07-12 10:31:10,220 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) [2022-07-12 10:31:10,221 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) [2022-07-12 10:31:10,221 INFO L186 Difference]: Start difference. First operand has 92 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2022-07-12 10:31:10,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 429 flow [2022-07-12 10:31:10,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-07-12 10:31:10,225 INFO L242 Difference]: Finished difference. Result has 100 places, 80 transitions, 247 flow [2022-07-12 10:31:10,226 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} [2022-07-12 10:31:10,227 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2022-07-12 10:31:10,227 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 247 flow [2022-07-12 10:31:10,228 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) [2022-07-12 10:31:10,228 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:10,228 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] [2022-07-12 10:31:10,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:31:10,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:10,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1001813793, now seen corresponding path program 3 times [2022-07-12 10:31:10,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:10,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817107344] [2022-07-12 10:31:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:10,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:10,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:10,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817107344] [2022-07-12 10:31:10,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817107344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:10,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:10,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 10:31:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597844255] [2022-07-12 10:31:10,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:10,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:31:10,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:31:10,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:31:10,528 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-12 10:31:10,529 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) [2022-07-12 10:31:10,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:10,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-12 10:31:10,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:10,816 INFO L129 PetriNetUnfolder]: 72/296 cut-off events. [2022-07-12 10:31:10,817 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-07-12 10:31:10,818 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. [2022-07-12 10:31:10,819 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2022-07-12 10:31:10,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 519 flow [2022-07-12 10:31:10,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:31:10,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:31:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2022-07-12 10:31:10,820 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2022-07-12 10:31:10,821 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2022-07-12 10:31:10,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2022-07-12 10:31:10,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:10,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2022-07-12 10:31:10,822 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) [2022-07-12 10:31:10,824 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) [2022-07-12 10:31:10,824 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) [2022-07-12 10:31:10,824 INFO L186 Difference]: Start difference. First operand has 100 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2022-07-12 10:31:10,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 519 flow [2022-07-12 10:31:10,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-07-12 10:31:10,827 INFO L242 Difference]: Finished difference. Result has 104 places, 84 transitions, 301 flow [2022-07-12 10:31:10,828 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} [2022-07-12 10:31:10,828 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2022-07-12 10:31:10,828 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 301 flow [2022-07-12 10:31:10,829 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) [2022-07-12 10:31:10,829 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:10,829 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] [2022-07-12 10:31:10,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:31:10,829 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:10,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash 269524785, now seen corresponding path program 4 times [2022-07-12 10:31:10,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:10,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674796776] [2022-07-12 10:31:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:10,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:11,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:11,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674796776] [2022-07-12 10:31:11,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674796776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:11,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:11,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 10:31:11,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267787161] [2022-07-12 10:31:11,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:11,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:31:11,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:31:11,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:31:11,086 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-12 10:31:11,087 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) [2022-07-12 10:31:11,087 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:11,087 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-12 10:31:11,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:11,362 INFO L129 PetriNetUnfolder]: 71/301 cut-off events. [2022-07-12 10:31:11,362 INFO L130 PetriNetUnfolder]: For 225/234 co-relation queries the response was YES. [2022-07-12 10:31:11,363 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. [2022-07-12 10:31:11,364 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2022-07-12 10:31:11,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 559 flow [2022-07-12 10:31:11,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:31:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:31:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2022-07-12 10:31:11,366 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2022-07-12 10:31:11,366 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2022-07-12 10:31:11,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2022-07-12 10:31:11,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:11,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2022-07-12 10:31:11,368 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) [2022-07-12 10:31:11,369 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) [2022-07-12 10:31:11,370 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) [2022-07-12 10:31:11,370 INFO L186 Difference]: Start difference. First operand has 104 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2022-07-12 10:31:11,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 559 flow [2022-07-12 10:31:11,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2022-07-12 10:31:11,373 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 352 flow [2022-07-12 10:31:11,373 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} [2022-07-12 10:31:11,374 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2022-07-12 10:31:11,374 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 352 flow [2022-07-12 10:31:11,374 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) [2022-07-12 10:31:11,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:11,375 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] [2022-07-12 10:31:11,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:31:11,375 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:11,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1546636013, now seen corresponding path program 5 times [2022-07-12 10:31:11,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:11,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698921505] [2022-07-12 10:31:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:11,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:11,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:11,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698921505] [2022-07-12 10:31:11,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698921505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:11,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:11,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 10:31:11,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891224655] [2022-07-12 10:31:11,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:11,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:31:11,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:31:11,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:31:11,613 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-12 10:31:11,614 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) [2022-07-12 10:31:11,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:11,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-12 10:31:11,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:11,858 INFO L129 PetriNetUnfolder]: 71/283 cut-off events. [2022-07-12 10:31:11,859 INFO L130 PetriNetUnfolder]: For 320/332 co-relation queries the response was YES. [2022-07-12 10:31:11,859 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. [2022-07-12 10:31:11,860 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2022-07-12 10:31:11,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 563 flow [2022-07-12 10:31:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:31:11,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:31:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2022-07-12 10:31:11,862 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2022-07-12 10:31:11,862 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2022-07-12 10:31:11,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2022-07-12 10:31:11,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:11,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2022-07-12 10:31:11,864 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) [2022-07-12 10:31:11,865 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) [2022-07-12 10:31:11,866 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) [2022-07-12 10:31:11,866 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2022-07-12 10:31:11,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 563 flow [2022-07-12 10:31:11,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-07-12 10:31:11,869 INFO L242 Difference]: Finished difference. Result has 115 places, 86 transitions, 368 flow [2022-07-12 10:31:11,869 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} [2022-07-12 10:31:11,869 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2022-07-12 10:31:11,869 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 86 transitions, 368 flow [2022-07-12 10:31:11,870 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) [2022-07-12 10:31:11,870 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:11,870 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] [2022-07-12 10:31:11,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:31:11,870 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:11,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1009642839, now seen corresponding path program 6 times [2022-07-12 10:31:11,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:11,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70318373] [2022-07-12 10:31:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:11,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:12,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70318373] [2022-07-12 10:31:12,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70318373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:12,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:12,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 10:31:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379653461] [2022-07-12 10:31:12,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:12,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:31:12,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:12,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:31:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:31:12,110 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-12 10:31:12,110 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) [2022-07-12 10:31:12,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:12,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-12 10:31:12,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:12,375 INFO L129 PetriNetUnfolder]: 68/250 cut-off events. [2022-07-12 10:31:12,375 INFO L130 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2022-07-12 10:31:12,375 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. [2022-07-12 10:31:12,376 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2022-07-12 10:31:12,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 102 transitions, 547 flow [2022-07-12 10:31:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:31:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:31:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2022-07-12 10:31:12,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2022-07-12 10:31:12,378 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2022-07-12 10:31:12,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2022-07-12 10:31:12,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:12,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2022-07-12 10:31:12,379 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) [2022-07-12 10:31:12,381 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) [2022-07-12 10:31:12,381 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) [2022-07-12 10:31:12,381 INFO L186 Difference]: Start difference. First operand has 115 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2022-07-12 10:31:12,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 102 transitions, 547 flow [2022-07-12 10:31:12,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-07-12 10:31:12,383 INFO L242 Difference]: Finished difference. Result has 114 places, 85 transitions, 350 flow [2022-07-12 10:31:12,383 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} [2022-07-12 10:31:12,384 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2022-07-12 10:31:12,384 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 85 transitions, 350 flow [2022-07-12 10:31:12,384 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) [2022-07-12 10:31:12,384 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:12,384 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] [2022-07-12 10:31:12,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:31:12,384 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:12,385 INFO L85 PathProgramCache]: Analyzing trace with hash 239848237, now seen corresponding path program 1 times [2022-07-12 10:31:12,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:12,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592530085] [2022-07-12 10:31:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:12,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:12,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592530085] [2022-07-12 10:31:12,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592530085] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178984499] [2022-07-12 10:31:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:12,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:12,642 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) [2022-07-12 10:31:12,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:31:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:12,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:12,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:13,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:13,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178984499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:13,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:13,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-12 10:31:13,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677855234] [2022-07-12 10:31:13,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:13,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 10:31:13,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 10:31:13,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:31:13,513 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:13,514 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) [2022-07-12 10:31:13,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:13,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:13,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:15,051 INFO L129 PetriNetUnfolder]: 168/599 cut-off events. [2022-07-12 10:31:15,051 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-12 10:31:15,053 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. [2022-07-12 10:31:15,055 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2022-07-12 10:31:15,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 251 transitions, 1334 flow [2022-07-12 10:31:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 10:31:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-12 10:31:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2022-07-12 10:31:15,060 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2022-07-12 10:31:15,061 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2022-07-12 10:31:15,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2022-07-12 10:31:15,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:15,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2022-07-12 10:31:15,067 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) [2022-07-12 10:31:15,072 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) [2022-07-12 10:31:15,073 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) [2022-07-12 10:31:15,073 INFO L186 Difference]: Start difference. First operand has 114 places, 85 transitions, 350 flow. Second operand 48 states and 2702 transitions. [2022-07-12 10:31:15,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 251 transitions, 1334 flow [2022-07-12 10:31:15,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1228 flow, removed 24 selfloop flow, removed 16 redundant places. [2022-07-12 10:31:15,078 INFO L242 Difference]: Finished difference. Result has 152 places, 152 transitions, 752 flow [2022-07-12 10:31:15,079 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} [2022-07-12 10:31:15,080 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2022-07-12 10:31:15,080 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 752 flow [2022-07-12 10:31:15,081 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) [2022-07-12 10:31:15,081 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:15,081 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] [2022-07-12 10:31:15,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:31:15,287 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 [2022-07-12 10:31:15,287 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:15,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:15,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2139285437, now seen corresponding path program 2 times [2022-07-12 10:31:15,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:15,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806609072] [2022-07-12 10:31:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:15,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:15,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:15,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806609072] [2022-07-12 10:31:15,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806609072] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:15,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106960800] [2022-07-12 10:31:15,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:31:15,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:15,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:15,521 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) [2022-07-12 10:31:15,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:31:15,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:31:15,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:15,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:15,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:15,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:16,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106960800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:16,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:16,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-12 10:31:16,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034725769] [2022-07-12 10:31:16,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:16,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 10:31:16,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:16,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 10:31:16,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:31:16,359 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:16,360 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) [2022-07-12 10:31:16,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:16,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:16,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:18,139 INFO L129 PetriNetUnfolder]: 226/775 cut-off events. [2022-07-12 10:31:18,139 INFO L130 PetriNetUnfolder]: For 686/686 co-relation queries the response was YES. [2022-07-12 10:31:18,141 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. [2022-07-12 10:31:18,144 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 99 selfloop transitions, 159 changer transitions 6/306 dead transitions. [2022-07-12 10:31:18,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 306 transitions, 2042 flow [2022-07-12 10:31:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 10:31:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-12 10:31:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3061 transitions. [2022-07-12 10:31:18,148 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6253319713993871 [2022-07-12 10:31:18,148 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3061 transitions. [2022-07-12 10:31:18,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3061 transitions. [2022-07-12 10:31:18,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:18,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3061 transitions. [2022-07-12 10:31:18,157 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) [2022-07-12 10:31:18,163 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) [2022-07-12 10:31:18,164 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) [2022-07-12 10:31:18,164 INFO L186 Difference]: Start difference. First operand has 152 places, 152 transitions, 752 flow. Second operand 55 states and 3061 transitions. [2022-07-12 10:31:18,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 306 transitions, 2042 flow [2022-07-12 10:31:18,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 306 transitions, 1875 flow, removed 69 selfloop flow, removed 9 redundant places. [2022-07-12 10:31:18,174 INFO L242 Difference]: Finished difference. Result has 204 places, 241 transitions, 1570 flow [2022-07-12 10:31:18,175 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} [2022-07-12 10:31:18,175 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 125 predicate places. [2022-07-12 10:31:18,175 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 241 transitions, 1570 flow [2022-07-12 10:31:18,176 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) [2022-07-12 10:31:18,176 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:18,176 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] [2022-07-12 10:31:18,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 10:31:18,394 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 [2022-07-12 10:31:18,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1975222373, now seen corresponding path program 3 times [2022-07-12 10:31:18,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:18,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307415227] [2022-07-12 10:31:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:18,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:18,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307415227] [2022-07-12 10:31:18,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307415227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521378256] [2022-07-12 10:31:18,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:31:18,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:18,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:18,687 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) [2022-07-12 10:31:18,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:31:18,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:31:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:18,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:19,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:19,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521378256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:19,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:19,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-12 10:31:19,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359528870] [2022-07-12 10:31:19,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:19,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 10:31:19,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 10:31:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:31:19,463 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:19,464 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) [2022-07-12 10:31:19,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:19,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:19,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:20,643 INFO L129 PetriNetUnfolder]: 279/963 cut-off events. [2022-07-12 10:31:20,643 INFO L130 PetriNetUnfolder]: For 1582/1582 co-relation queries the response was YES. [2022-07-12 10:31:20,646 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. [2022-07-12 10:31:20,650 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 133 selfloop transitions, 188 changer transitions 6/369 dead transitions. [2022-07-12 10:31:20,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 369 transitions, 3081 flow [2022-07-12 10:31:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 10:31:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-12 10:31:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2022-07-12 10:31:20,652 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2022-07-12 10:31:20,653 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2022-07-12 10:31:20,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2022-07-12 10:31:20,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:20,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2022-07-12 10:31:20,656 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) [2022-07-12 10:31:20,659 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) [2022-07-12 10:31:20,660 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) [2022-07-12 10:31:20,660 INFO L186 Difference]: Start difference. First operand has 204 places, 241 transitions, 1570 flow. Second operand 39 states and 2186 transitions. [2022-07-12 10:31:20,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 369 transitions, 3081 flow [2022-07-12 10:31:20,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 369 transitions, 2820 flow, removed 74 selfloop flow, removed 18 redundant places. [2022-07-12 10:31:20,673 INFO L242 Difference]: Finished difference. Result has 232 places, 299 transitions, 2385 flow [2022-07-12 10:31:20,673 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} [2022-07-12 10:31:20,674 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 153 predicate places. [2022-07-12 10:31:20,674 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 299 transitions, 2385 flow [2022-07-12 10:31:20,675 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) [2022-07-12 10:31:20,675 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:20,675 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] [2022-07-12 10:31:20,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:20,892 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 [2022-07-12 10:31:20,893 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:20,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:20,893 INFO L85 PathProgramCache]: Analyzing trace with hash -6530063, now seen corresponding path program 4 times [2022-07-12 10:31:20,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:20,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977486353] [2022-07-12 10:31:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:20,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:21,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:21,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977486353] [2022-07-12 10:31:21,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977486353] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:21,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690365032] [2022-07-12 10:31:21,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:31:21,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:21,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:21,128 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) [2022-07-12 10:31:21,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:31:21,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:31:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:21,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:21,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:21,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690365032] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:21,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:21,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-12 10:31:21,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101992701] [2022-07-12 10:31:21,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:21,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 10:31:21,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 10:31:21,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:31:21,838 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:21,839 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) [2022-07-12 10:31:21,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:21,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:21,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:24,976 INFO L129 PetriNetUnfolder]: 364/1329 cut-off events. [2022-07-12 10:31:24,977 INFO L130 PetriNetUnfolder]: For 3205/3207 co-relation queries the response was YES. [2022-07-12 10:31:24,993 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. [2022-07-12 10:31:24,997 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 168 selfloop transitions, 308 changer transitions 6/524 dead transitions. [2022-07-12 10:31:24,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 524 transitions, 4927 flow [2022-07-12 10:31:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-12 10:31:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-12 10:31:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4518 transitions. [2022-07-12 10:31:25,002 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6267166042446941 [2022-07-12 10:31:25,002 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4518 transitions. [2022-07-12 10:31:25,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4518 transitions. [2022-07-12 10:31:25,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:25,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4518 transitions. [2022-07-12 10:31:25,009 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) [2022-07-12 10:31:25,015 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) [2022-07-12 10:31:25,016 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) [2022-07-12 10:31:25,016 INFO L186 Difference]: Start difference. First operand has 232 places, 299 transitions, 2385 flow. Second operand 81 states and 4518 transitions. [2022-07-12 10:31:25,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 524 transitions, 4927 flow [2022-07-12 10:31:25,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 524 transitions, 4790 flow, removed 62 selfloop flow, removed 8 redundant places. [2022-07-12 10:31:25,035 INFO L242 Difference]: Finished difference. Result has 315 places, 399 transitions, 4004 flow [2022-07-12 10:31:25,036 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} [2022-07-12 10:31:25,036 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 236 predicate places. [2022-07-12 10:31:25,036 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 399 transitions, 4004 flow [2022-07-12 10:31:25,037 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) [2022-07-12 10:31:25,037 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:25,037 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] [2022-07-12 10:31:25,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:25,252 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 [2022-07-12 10:31:25,252 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:25,252 INFO L85 PathProgramCache]: Analyzing trace with hash 820807317, now seen corresponding path program 5 times [2022-07-12 10:31:25,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:25,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756144804] [2022-07-12 10:31:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:25,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:25,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:25,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756144804] [2022-07-12 10:31:25,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756144804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:25,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848121254] [2022-07-12 10:31:25,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:31:25,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:25,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:25,461 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) [2022-07-12 10:31:25,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:31:25,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:31:25,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:25,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:25,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:25,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:26,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848121254] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:26,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:26,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-12 10:31:26,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121716405] [2022-07-12 10:31:26,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:26,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 10:31:26,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:26,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 10:31:26,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:31:26,221 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:26,222 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) [2022-07-12 10:31:26,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:26,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:26,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:29,045 INFO L129 PetriNetUnfolder]: 387/1376 cut-off events. [2022-07-12 10:31:29,045 INFO L130 PetriNetUnfolder]: For 6525/6527 co-relation queries the response was YES. [2022-07-12 10:31:29,050 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. [2022-07-12 10:31:29,056 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 180 selfloop transitions, 328 changer transitions 6/556 dead transitions. [2022-07-12 10:31:29,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 556 transitions, 6290 flow [2022-07-12 10:31:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-12 10:31:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-12 10:31:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4528 transitions. [2022-07-12 10:31:29,061 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6281037591899015 [2022-07-12 10:31:29,061 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4528 transitions. [2022-07-12 10:31:29,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4528 transitions. [2022-07-12 10:31:29,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:29,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4528 transitions. [2022-07-12 10:31:29,067 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) [2022-07-12 10:31:29,072 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) [2022-07-12 10:31:29,073 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) [2022-07-12 10:31:29,073 INFO L186 Difference]: Start difference. First operand has 315 places, 399 transitions, 4004 flow. Second operand 81 states and 4528 transitions. [2022-07-12 10:31:29,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 556 transitions, 6290 flow [2022-07-12 10:31:29,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 556 transitions, 5986 flow, removed 82 selfloop flow, removed 19 redundant places. [2022-07-12 10:31:29,131 INFO L242 Difference]: Finished difference. Result has 381 places, 434 transitions, 4948 flow [2022-07-12 10:31:29,131 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} [2022-07-12 10:31:29,132 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 302 predicate places. [2022-07-12 10:31:29,132 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 434 transitions, 4948 flow [2022-07-12 10:31:29,133 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) [2022-07-12 10:31:29,133 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:29,133 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] [2022-07-12 10:31:29,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 10:31:29,347 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 [2022-07-12 10:31:29,347 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:29,348 INFO L85 PathProgramCache]: Analyzing trace with hash -609410941, now seen corresponding path program 6 times [2022-07-12 10:31:29,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:29,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50467981] [2022-07-12 10:31:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:29,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:29,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:29,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50467981] [2022-07-12 10:31:29,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50467981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:29,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85849139] [2022-07-12 10:31:29,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:31:29,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:29,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:29,570 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) [2022-07-12 10:31:29,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:31:29,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:31:29,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:29,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:29,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:29,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:30,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85849139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:30,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:30,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-12 10:31:30,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855392418] [2022-07-12 10:31:30,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:30,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 10:31:30,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 10:31:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:31:30,310 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:30,311 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) [2022-07-12 10:31:30,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:30,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:30,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:31,820 INFO L129 PetriNetUnfolder]: 514/1746 cut-off events. [2022-07-12 10:31:31,820 INFO L130 PetriNetUnfolder]: For 12376/12378 co-relation queries the response was YES. [2022-07-12 10:31:31,828 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. [2022-07-12 10:31:31,838 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 222 selfloop transitions, 332 changer transitions 6/602 dead transitions. [2022-07-12 10:31:31,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 602 transitions, 7994 flow [2022-07-12 10:31:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 10:31:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-12 10:31:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2185 transitions. [2022-07-12 10:31:31,845 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6295015845577643 [2022-07-12 10:31:31,845 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2185 transitions. [2022-07-12 10:31:31,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2185 transitions. [2022-07-12 10:31:31,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:31,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2185 transitions. [2022-07-12 10:31:31,850 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) [2022-07-12 10:31:31,855 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) [2022-07-12 10:31:31,856 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) [2022-07-12 10:31:31,856 INFO L186 Difference]: Start difference. First operand has 381 places, 434 transitions, 4948 flow. Second operand 39 states and 2185 transitions. [2022-07-12 10:31:31,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 602 transitions, 7994 flow [2022-07-12 10:31:31,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 602 transitions, 7223 flow, removed 117 selfloop flow, removed 56 redundant places. [2022-07-12 10:31:31,923 INFO L242 Difference]: Finished difference. Result has 370 places, 524 transitions, 6675 flow [2022-07-12 10:31:31,923 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} [2022-07-12 10:31:31,924 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 291 predicate places. [2022-07-12 10:31:31,924 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 524 transitions, 6675 flow [2022-07-12 10:31:31,925 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) [2022-07-12 10:31:31,925 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:31,925 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] [2022-07-12 10:31:31,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:32,139 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 [2022-07-12 10:31:32,139 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash -248882329, now seen corresponding path program 7 times [2022-07-12 10:31:32,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:32,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755694241] [2022-07-12 10:31:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:32,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:32,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:32,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755694241] [2022-07-12 10:31:32,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755694241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873101466] [2022-07-12 10:31:32,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:31:32,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:32,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:32,353 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) [2022-07-12 10:31:32,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:31:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:32,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:32,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:32,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:33,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873101466] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:33,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:33,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-12 10:31:33,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257561389] [2022-07-12 10:31:33,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:33,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 10:31:33,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:33,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 10:31:33,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:31:33,062 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:33,062 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) [2022-07-12 10:31:33,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:33,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:33,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:35,455 INFO L129 PetriNetUnfolder]: 574/1932 cut-off events. [2022-07-12 10:31:35,456 INFO L130 PetriNetUnfolder]: For 16164/16166 co-relation queries the response was YES. [2022-07-12 10:31:35,465 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. [2022-07-12 10:31:35,475 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 187 selfloop transitions, 443 changer transitions 6/678 dead transitions. [2022-07-12 10:31:35,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 678 transitions, 9597 flow [2022-07-12 10:31:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 10:31:35,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-12 10:31:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3334 transitions. [2022-07-12 10:31:35,477 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6243445692883896 [2022-07-12 10:31:35,478 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3334 transitions. [2022-07-12 10:31:35,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3334 transitions. [2022-07-12 10:31:35,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:35,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3334 transitions. [2022-07-12 10:31:35,481 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) [2022-07-12 10:31:35,484 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) [2022-07-12 10:31:35,485 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) [2022-07-12 10:31:35,485 INFO L186 Difference]: Start difference. First operand has 370 places, 524 transitions, 6675 flow. Second operand 60 states and 3334 transitions. [2022-07-12 10:31:35,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 678 transitions, 9597 flow [2022-07-12 10:31:35,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 678 transitions, 9352 flow, removed 97 selfloop flow, removed 12 redundant places. [2022-07-12 10:31:35,618 INFO L242 Difference]: Finished difference. Result has 428 places, 605 transitions, 8996 flow [2022-07-12 10:31:35,619 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} [2022-07-12 10:31:35,619 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 349 predicate places. [2022-07-12 10:31:35,619 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 605 transitions, 8996 flow [2022-07-12 10:31:35,620 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) [2022-07-12 10:31:35,620 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:35,620 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] [2022-07-12 10:31:35,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:35,835 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 [2022-07-12 10:31:35,835 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:35,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:35,836 INFO L85 PathProgramCache]: Analyzing trace with hash -974553547, now seen corresponding path program 8 times [2022-07-12 10:31:35,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:35,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368872825] [2022-07-12 10:31:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:35,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:36,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:36,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368872825] [2022-07-12 10:31:36,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368872825] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:36,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624306378] [2022-07-12 10:31:36,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:31:36,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:36,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:36,066 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) [2022-07-12 10:31:36,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:31:36,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:31:36,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:36,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:36,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:36,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:36,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624306378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:36,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:36,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-12 10:31:36,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827521571] [2022-07-12 10:31:36,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:36,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 10:31:36,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:36,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 10:31:36,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:31:36,799 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:36,801 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) [2022-07-12 10:31:36,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:36,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:36,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:37,836 INFO L129 PetriNetUnfolder]: 574/1942 cut-off events. [2022-07-12 10:31:37,836 INFO L130 PetriNetUnfolder]: For 18163/18177 co-relation queries the response was YES. [2022-07-12 10:31:37,847 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. [2022-07-12 10:31:37,856 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 244 selfloop transitions, 346 changer transitions 6/638 dead transitions. [2022-07-12 10:31:37,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 638 transitions, 10522 flow [2022-07-12 10:31:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 10:31:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-12 10:31:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1452 transitions. [2022-07-12 10:31:37,857 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6274848746758859 [2022-07-12 10:31:37,858 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1452 transitions. [2022-07-12 10:31:37,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1452 transitions. [2022-07-12 10:31:37,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:37,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1452 transitions. [2022-07-12 10:31:37,859 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) [2022-07-12 10:31:37,861 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) [2022-07-12 10:31:37,861 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) [2022-07-12 10:31:37,861 INFO L186 Difference]: Start difference. First operand has 428 places, 605 transitions, 8996 flow. Second operand 26 states and 1452 transitions. [2022-07-12 10:31:37,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 638 transitions, 10522 flow [2022-07-12 10:31:37,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 638 transitions, 10144 flow, removed 102 selfloop flow, removed 27 redundant places. [2022-07-12 10:31:37,996 INFO L242 Difference]: Finished difference. Result has 429 places, 610 transitions, 9687 flow [2022-07-12 10:31:37,997 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} [2022-07-12 10:31:37,997 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 350 predicate places. [2022-07-12 10:31:37,997 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 610 transitions, 9687 flow [2022-07-12 10:31:37,998 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) [2022-07-12 10:31:37,998 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:37,998 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] [2022-07-12 10:31:38,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:38,210 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 [2022-07-12 10:31:38,210 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:38,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:38,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1457300325, now seen corresponding path program 9 times [2022-07-12 10:31:38,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:38,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669248390] [2022-07-12 10:31:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:38,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:38,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:38,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669248390] [2022-07-12 10:31:38,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669248390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:38,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276643039] [2022-07-12 10:31:38,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:31:38,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:38,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:38,396 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) [2022-07-12 10:31:38,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:31:38,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:31:38,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:38,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:38,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:39,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276643039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:39,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:39,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-07-12 10:31:39,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337820686] [2022-07-12 10:31:39,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:39,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 10:31:39,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:39,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 10:31:39,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 10:31:39,218 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:39,219 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) [2022-07-12 10:31:39,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:39,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:39,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:43,575 INFO L129 PetriNetUnfolder]: 801/2801 cut-off events. [2022-07-12 10:31:43,576 INFO L130 PetriNetUnfolder]: For 30194/30196 co-relation queries the response was YES. [2022-07-12 10:31:43,591 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. [2022-07-12 10:31:43,602 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 215 selfloop transitions, 689 changer transitions 12/958 dead transitions. [2022-07-12 10:31:43,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 958 transitions, 16814 flow [2022-07-12 10:31:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-12 10:31:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-07-12 10:31:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5261 transitions. [2022-07-12 10:31:43,616 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6222353636901242 [2022-07-12 10:31:43,616 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5261 transitions. [2022-07-12 10:31:43,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5261 transitions. [2022-07-12 10:31:43,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:43,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5261 transitions. [2022-07-12 10:31:43,622 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) [2022-07-12 10:31:43,630 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) [2022-07-12 10:31:43,631 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) [2022-07-12 10:31:43,631 INFO L186 Difference]: Start difference. First operand has 429 places, 610 transitions, 9687 flow. Second operand 95 states and 5261 transitions. [2022-07-12 10:31:43,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 958 transitions, 16814 flow [2022-07-12 10:31:43,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 958 transitions, 16379 flow, removed 11 selfloop flow, removed 19 redundant places. [2022-07-12 10:31:43,792 INFO L242 Difference]: Finished difference. Result has 522 places, 850 transitions, 15829 flow [2022-07-12 10:31:43,793 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} [2022-07-12 10:31:43,793 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 443 predicate places. [2022-07-12 10:31:43,793 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 850 transitions, 15829 flow [2022-07-12 10:31:43,794 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) [2022-07-12 10:31:43,794 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:43,794 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] [2022-07-12 10:31:43,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:44,012 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 [2022-07-12 10:31:44,012 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:44,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:44,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1685575279, now seen corresponding path program 10 times [2022-07-12 10:31:44,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:44,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58447488] [2022-07-12 10:31:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:44,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:44,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:44,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58447488] [2022-07-12 10:31:44,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58447488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:44,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244728824] [2022-07-12 10:31:44,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:31:44,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:44,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:44,244 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) [2022-07-12 10:31:44,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:31:44,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:31:44,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:44,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:44,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:44,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:45,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244728824] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:45,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:45,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-12 10:31:45,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797438779] [2022-07-12 10:31:45,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:45,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 10:31:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:45,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 10:31:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:31:45,003 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:45,004 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) [2022-07-12 10:31:45,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:45,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:45,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:47,839 INFO L129 PetriNetUnfolder]: 939/3221 cut-off events. [2022-07-12 10:31:47,839 INFO L130 PetriNetUnfolder]: For 58668/58670 co-relation queries the response was YES. [2022-07-12 10:31:47,863 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. [2022-07-12 10:31:47,877 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 361 selfloop transitions, 665 changer transitions 12/1080 dead transitions. [2022-07-12 10:31:47,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 1080 transitions, 21702 flow [2022-07-12 10:31:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-12 10:31:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-12 10:31:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3584 transitions. [2022-07-12 10:31:47,880 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6292134831460674 [2022-07-12 10:31:47,880 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3584 transitions. [2022-07-12 10:31:47,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3584 transitions. [2022-07-12 10:31:47,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:47,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3584 transitions. [2022-07-12 10:31:47,884 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) [2022-07-12 10:31:47,887 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) [2022-07-12 10:31:47,888 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) [2022-07-12 10:31:47,888 INFO L186 Difference]: Start difference. First operand has 522 places, 850 transitions, 15829 flow. Second operand 64 states and 3584 transitions. [2022-07-12 10:31:47,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 1080 transitions, 21702 flow [2022-07-12 10:31:48,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1080 transitions, 20303 flow, removed 588 selfloop flow, removed 25 redundant places. [2022-07-12 10:31:48,258 INFO L242 Difference]: Finished difference. Result has 561 places, 983 transitions, 19489 flow [2022-07-12 10:31:48,259 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} [2022-07-12 10:31:48,259 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 482 predicate places. [2022-07-12 10:31:48,259 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 983 transitions, 19489 flow [2022-07-12 10:31:48,260 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) [2022-07-12 10:31:48,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:48,260 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] [2022-07-12 10:31:48,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:48,465 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 [2022-07-12 10:31:48,465 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1086203295, now seen corresponding path program 11 times [2022-07-12 10:31:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:48,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90508526] [2022-07-12 10:31:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:48,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:48,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90508526] [2022-07-12 10:31:48,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90508526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256168802] [2022-07-12 10:31:48,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:31:48,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:48,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:48,653 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) [2022-07-12 10:31:48,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:31:48,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:31:48,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:48,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:48,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:49,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:49,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256168802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:49,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:49,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-12 10:31:49,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374871833] [2022-07-12 10:31:49,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:49,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:31:49,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:31:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 10:31:49,514 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:49,515 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) [2022-07-12 10:31:49,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:49,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:49,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:51,154 INFO L129 PetriNetUnfolder]: 937/3208 cut-off events. [2022-07-12 10:31:51,154 INFO L130 PetriNetUnfolder]: For 55886/55902 co-relation queries the response was YES. [2022-07-12 10:31:51,216 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. [2022-07-12 10:31:51,244 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 421 selfloop transitions, 547 changer transitions 12/1022 dead transitions. [2022-07-12 10:31:51,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 1022 transitions, 21912 flow [2022-07-12 10:31:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 10:31:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-12 10:31:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1878 transitions. [2022-07-12 10:31:51,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6206212822207535 [2022-07-12 10:31:51,246 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1878 transitions. [2022-07-12 10:31:51,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1878 transitions. [2022-07-12 10:31:51,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:51,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1878 transitions. [2022-07-12 10:31:51,248 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) [2022-07-12 10:31:51,250 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) [2022-07-12 10:31:51,250 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) [2022-07-12 10:31:51,250 INFO L186 Difference]: Start difference. First operand has 561 places, 983 transitions, 19489 flow. Second operand 34 states and 1878 transitions. [2022-07-12 10:31:51,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 1022 transitions, 21912 flow [2022-07-12 10:31:51,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1022 transitions, 21461 flow, removed 88 selfloop flow, removed 32 redundant places. [2022-07-12 10:31:51,554 INFO L242 Difference]: Finished difference. Result has 566 places, 993 transitions, 20815 flow [2022-07-12 10:31:51,555 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} [2022-07-12 10:31:51,555 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 487 predicate places. [2022-07-12 10:31:51,555 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 993 transitions, 20815 flow [2022-07-12 10:31:51,555 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) [2022-07-12 10:31:51,556 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:51,556 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] [2022-07-12 10:31:51,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:51,756 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 [2022-07-12 10:31:51,756 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:51,757 INFO L85 PathProgramCache]: Analyzing trace with hash -998248241, now seen corresponding path program 12 times [2022-07-12 10:31:51,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:51,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012907139] [2022-07-12 10:31:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:51,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:51,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:51,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012907139] [2022-07-12 10:31:51,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012907139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:51,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859291765] [2022-07-12 10:31:51,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:31:51,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:51,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:51,947 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) [2022-07-12 10:31:51,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:31:51,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:31:51,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:51,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:51,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:52,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:52,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859291765] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:52,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:52,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-12 10:31:52,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086178555] [2022-07-12 10:31:52,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:52,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:31:52,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:52,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:31:52,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1104, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 10:31:52,731 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:52,732 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) [2022-07-12 10:31:52,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:52,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:52,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:54,876 INFO L129 PetriNetUnfolder]: 941/3563 cut-off events. [2022-07-12 10:31:54,876 INFO L130 PetriNetUnfolder]: For 63398/63414 co-relation queries the response was YES. [2022-07-12 10:31:54,905 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. [2022-07-12 10:31:54,919 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 397 selfloop transitions, 588 changer transitions 12/1039 dead transitions. [2022-07-12 10:31:54,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1039 transitions, 23359 flow [2022-07-12 10:31:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 10:31:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-12 10:31:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2158 transitions. [2022-07-12 10:31:54,921 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6217228464419475 [2022-07-12 10:31:54,921 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2158 transitions. [2022-07-12 10:31:54,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2158 transitions. [2022-07-12 10:31:54,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:54,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2158 transitions. [2022-07-12 10:31:54,924 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) [2022-07-12 10:31:54,926 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) [2022-07-12 10:31:54,926 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) [2022-07-12 10:31:54,926 INFO L186 Difference]: Start difference. First operand has 566 places, 993 transitions, 20815 flow. Second operand 39 states and 2158 transitions. [2022-07-12 10:31:54,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1039 transitions, 23359 flow [2022-07-12 10:31:55,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1039 transitions, 22889 flow, removed 18 selfloop flow, removed 20 redundant places. [2022-07-12 10:31:55,320 INFO L242 Difference]: Finished difference. Result has 589 places, 1003 transitions, 22368 flow [2022-07-12 10:31:55,320 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} [2022-07-12 10:31:55,321 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 510 predicate places. [2022-07-12 10:31:55,321 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1003 transitions, 22368 flow [2022-07-12 10:31:55,321 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) [2022-07-12 10:31:55,321 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:55,321 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] [2022-07-12 10:31:55,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:55,522 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 [2022-07-12 10:31:55,522 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:55,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash -54177703, now seen corresponding path program 13 times [2022-07-12 10:31:55,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:55,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836517561] [2022-07-12 10:31:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:55,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:55,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:55,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836517561] [2022-07-12 10:31:55,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836517561] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:55,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457877011] [2022-07-12 10:31:55,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:31:55,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:55,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:55,703 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) [2022-07-12 10:31:55,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:31:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:55,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:55,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:56,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:56,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457877011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:56,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:56,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-12 10:31:56,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211963278] [2022-07-12 10:31:56,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:56,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:31:56,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:56,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:31:56,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 10:31:56,515 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:31:56,515 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) [2022-07-12 10:31:56,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:56,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:31:56,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:58,609 INFO L129 PetriNetUnfolder]: 941/3561 cut-off events. [2022-07-12 10:31:58,609 INFO L130 PetriNetUnfolder]: For 71448/71459 co-relation queries the response was YES. [2022-07-12 10:31:58,640 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. [2022-07-12 10:31:58,656 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 409 selfloop transitions, 581 changer transitions 12/1044 dead transitions. [2022-07-12 10:31:58,657 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1044 transitions, 24884 flow [2022-07-12 10:31:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 10:31:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-12 10:31:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2041 transitions. [2022-07-12 10:31:58,659 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6197995748557547 [2022-07-12 10:31:58,659 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2041 transitions. [2022-07-12 10:31:58,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2041 transitions. [2022-07-12 10:31:58,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:58,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2041 transitions. [2022-07-12 10:31:58,661 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) [2022-07-12 10:31:58,663 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) [2022-07-12 10:31:58,663 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) [2022-07-12 10:31:58,663 INFO L186 Difference]: Start difference. First operand has 589 places, 1003 transitions, 22368 flow. Second operand 37 states and 2041 transitions. [2022-07-12 10:31:58,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1044 transitions, 24884 flow [2022-07-12 10:31:59,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 1044 transitions, 24711 flow, removed 34 selfloop flow, removed 22 redundant places. [2022-07-12 10:31:59,075 INFO L242 Difference]: Finished difference. Result has 608 places, 1016 transitions, 24077 flow [2022-07-12 10:31:59,075 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} [2022-07-12 10:31:59,076 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 529 predicate places. [2022-07-12 10:31:59,076 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1016 transitions, 24077 flow [2022-07-12 10:31:59,076 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) [2022-07-12 10:31:59,077 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:59,077 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] [2022-07-12 10:31:59,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:59,296 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 [2022-07-12 10:31:59,296 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1848370869, now seen corresponding path program 14 times [2022-07-12 10:31:59,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:59,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100321703] [2022-07-12 10:31:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:59,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:59,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:59,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100321703] [2022-07-12 10:31:59,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100321703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:59,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151884100] [2022-07-12 10:31:59,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:31:59,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:59,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:59,471 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) [2022-07-12 10:31:59,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:31:59,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:31:59,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:59,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:31:59,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:59,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:00,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151884100] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:00,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:00,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-12 10:32:00,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62623356] [2022-07-12 10:32:00,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:00,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:32:00,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:00,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:32:00,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 10:32:00,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:32:00,279 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) [2022-07-12 10:32:00,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:00,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:32:00,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:02,213 INFO L129 PetriNetUnfolder]: 943/3672 cut-off events. [2022-07-12 10:32:02,214 INFO L130 PetriNetUnfolder]: For 83048/83079 co-relation queries the response was YES. [2022-07-12 10:32:02,322 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. [2022-07-12 10:32:02,338 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 401 selfloop transitions, 597 changer transitions 6/1046 dead transitions. [2022-07-12 10:32:02,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 1046 transitions, 26512 flow [2022-07-12 10:32:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 10:32:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-12 10:32:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1775 transitions. [2022-07-12 10:32:02,340 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6232443820224719 [2022-07-12 10:32:02,340 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1775 transitions. [2022-07-12 10:32:02,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1775 transitions. [2022-07-12 10:32:02,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:02,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1775 transitions. [2022-07-12 10:32:02,342 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) [2022-07-12 10:32:02,344 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) [2022-07-12 10:32:02,344 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) [2022-07-12 10:32:02,344 INFO L186 Difference]: Start difference. First operand has 608 places, 1016 transitions, 24077 flow. Second operand 32 states and 1775 transitions. [2022-07-12 10:32:02,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 1046 transitions, 26512 flow [2022-07-12 10:32:02,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 1046 transitions, 25991 flow, removed 31 selfloop flow, removed 21 redundant places. [2022-07-12 10:32:02,787 INFO L242 Difference]: Finished difference. Result has 619 places, 1024 transitions, 25538 flow [2022-07-12 10:32:02,788 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} [2022-07-12 10:32:02,788 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 540 predicate places. [2022-07-12 10:32:02,788 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 1024 transitions, 25538 flow [2022-07-12 10:32:02,789 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) [2022-07-12 10:32:02,789 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:02,789 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] [2022-07-12 10:32:02,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-12 10:32:03,005 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 [2022-07-12 10:32:03,006 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:03,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1050767011, now seen corresponding path program 15 times [2022-07-12 10:32:03,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:03,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352183581] [2022-07-12 10:32:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:03,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:03,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:03,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352183581] [2022-07-12 10:32:03,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352183581] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370280874] [2022-07-12 10:32:03,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:32:03,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:03,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:03,249 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) [2022-07-12 10:32:03,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:32:03,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:32:03,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:03,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:32:03,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:03,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:04,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370280874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:04,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:04,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-12 10:32:04,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962132760] [2022-07-12 10:32:04,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:04,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:32:04,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:04,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:32:04,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 10:32:04,004 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:32:04,005 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) [2022-07-12 10:32:04,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:04,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:32:04,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:06,691 INFO L129 PetriNetUnfolder]: 948/3631 cut-off events. [2022-07-12 10:32:06,692 INFO L130 PetriNetUnfolder]: For 90876/90905 co-relation queries the response was YES. [2022-07-12 10:32:06,730 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. [2022-07-12 10:32:06,745 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 386 selfloop transitions, 679 changer transitions 6/1113 dead transitions. [2022-07-12 10:32:06,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1113 transitions, 29047 flow [2022-07-12 10:32:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-12 10:32:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-07-12 10:32:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2789 transitions. [2022-07-12 10:32:06,748 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6267415730337078 [2022-07-12 10:32:06,748 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2789 transitions. [2022-07-12 10:32:06,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2789 transitions. [2022-07-12 10:32:06,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:06,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2789 transitions. [2022-07-12 10:32:06,751 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) [2022-07-12 10:32:06,753 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) [2022-07-12 10:32:06,753 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) [2022-07-12 10:32:06,753 INFO L186 Difference]: Start difference. First operand has 619 places, 1024 transitions, 25538 flow. Second operand 50 states and 2789 transitions. [2022-07-12 10:32:06,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1113 transitions, 29047 flow [2022-07-12 10:32:07,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 1113 transitions, 28854 flow, removed 23 selfloop flow, removed 20 redundant places. [2022-07-12 10:32:07,412 INFO L242 Difference]: Finished difference. Result has 654 places, 1053 transitions, 27975 flow [2022-07-12 10:32:07,413 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} [2022-07-12 10:32:07,414 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 575 predicate places. [2022-07-12 10:32:07,414 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 1053 transitions, 27975 flow [2022-07-12 10:32:07,414 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) [2022-07-12 10:32:07,414 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:07,415 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] [2022-07-12 10:32:07,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:07,625 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 [2022-07-12 10:32:07,625 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:07,626 INFO L85 PathProgramCache]: Analyzing trace with hash -280113973, now seen corresponding path program 16 times [2022-07-12 10:32:07,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:07,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568272953] [2022-07-12 10:32:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:07,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:07,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:07,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568272953] [2022-07-12 10:32:07,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568272953] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:07,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013069352] [2022-07-12 10:32:07,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:32:07,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:07,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:07,803 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) [2022-07-12 10:32:07,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 10:32:07,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:32:07,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:32:07,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:08,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:08,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013069352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:08,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:08,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-12 10:32:08,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315218958] [2022-07-12 10:32:08,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:08,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:32:08,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:08,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:32:08,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 10:32:08,616 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:32:08,617 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) [2022-07-12 10:32:08,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:08,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:32:08,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:13,136 INFO L129 PetriNetUnfolder]: 974/3757 cut-off events. [2022-07-12 10:32:13,136 INFO L130 PetriNetUnfolder]: For 107919/107935 co-relation queries the response was YES. [2022-07-12 10:32:13,166 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. [2022-07-12 10:32:13,182 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 313 selfloop transitions, 822 changer transitions 12/1189 dead transitions. [2022-07-12 10:32:13,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 1189 transitions, 32469 flow [2022-07-12 10:32:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-12 10:32:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-12 10:32:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4796 transitions. [2022-07-12 10:32:13,186 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6193981660854966 [2022-07-12 10:32:13,186 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4796 transitions. [2022-07-12 10:32:13,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4796 transitions. [2022-07-12 10:32:13,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:13,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4796 transitions. [2022-07-12 10:32:13,191 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) [2022-07-12 10:32:13,195 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) [2022-07-12 10:32:13,195 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) [2022-07-12 10:32:13,195 INFO L186 Difference]: Start difference. First operand has 654 places, 1053 transitions, 27975 flow. Second operand 87 states and 4796 transitions. [2022-07-12 10:32:13,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 1189 transitions, 32469 flow [2022-07-12 10:32:13,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 1189 transitions, 32059 flow, removed 81 selfloop flow, removed 20 redundant places. [2022-07-12 10:32:13,772 INFO L242 Difference]: Finished difference. Result has 734 places, 1117 transitions, 31519 flow [2022-07-12 10:32:13,773 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} [2022-07-12 10:32:13,773 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 655 predicate places. [2022-07-12 10:32:13,774 INFO L495 AbstractCegarLoop]: Abstraction has has 734 places, 1117 transitions, 31519 flow [2022-07-12 10:32:13,774 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) [2022-07-12 10:32:13,774 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:13,774 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] [2022-07-12 10:32:13,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:13,983 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 [2022-07-12 10:32:13,983 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1771949071, now seen corresponding path program 17 times [2022-07-12 10:32:13,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:13,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790810470] [2022-07-12 10:32:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:13,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:14,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:14,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790810470] [2022-07-12 10:32:14,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790810470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:14,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585844660] [2022-07-12 10:32:14,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:32:14,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:14,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:14,170 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) [2022-07-12 10:32:14,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 10:32:14,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:32:14,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:14,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:32:14,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:14,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:14,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585844660] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:14,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:14,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-12 10:32:14,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070824794] [2022-07-12 10:32:14,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:14,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 10:32:14,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:14,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 10:32:14,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:32:14,795 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:32:14,796 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) [2022-07-12 10:32:14,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:14,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:32:14,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:16,738 INFO L129 PetriNetUnfolder]: 974/3694 cut-off events. [2022-07-12 10:32:16,739 INFO L130 PetriNetUnfolder]: For 131119/131137 co-relation queries the response was YES. [2022-07-12 10:32:16,777 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. [2022-07-12 10:32:16,795 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 504 selfloop transitions, 591 changer transitions 6/1143 dead transitions. [2022-07-12 10:32:16,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 1143 transitions, 34130 flow [2022-07-12 10:32:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 10:32:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-12 10:32:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1445 transitions. [2022-07-12 10:32:16,797 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6244598098530683 [2022-07-12 10:32:16,797 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1445 transitions. [2022-07-12 10:32:16,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1445 transitions. [2022-07-12 10:32:16,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:16,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1445 transitions. [2022-07-12 10:32:16,799 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) [2022-07-12 10:32:16,800 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) [2022-07-12 10:32:16,800 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) [2022-07-12 10:32:16,800 INFO L186 Difference]: Start difference. First operand has 734 places, 1117 transitions, 31519 flow. Second operand 26 states and 1445 transitions. [2022-07-12 10:32:16,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 1143 transitions, 34130 flow [2022-07-12 10:32:17,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 1143 transitions, 32991 flow, removed 240 selfloop flow, removed 44 redundant places. [2022-07-12 10:32:17,540 INFO L242 Difference]: Finished difference. Result has 716 places, 1123 transitions, 32239 flow [2022-07-12 10:32:17,541 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} [2022-07-12 10:32:17,541 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 637 predicate places. [2022-07-12 10:32:17,541 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 1123 transitions, 32239 flow [2022-07-12 10:32:17,541 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) [2022-07-12 10:32:17,541 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:17,541 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] [2022-07-12 10:32:17,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-12 10:32:17,742 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 [2022-07-12 10:32:17,742 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:17,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:17,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1738791515, now seen corresponding path program 18 times [2022-07-12 10:32:17,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:17,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893366007] [2022-07-12 10:32:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:17,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:17,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:17,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893366007] [2022-07-12 10:32:17,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893366007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:17,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675119568] [2022-07-12 10:32:17,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:32:17,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:17,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:17,966 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) [2022-07-12 10:32:17,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 10:32:18,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:32:18,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:18,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:32:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:18,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:18,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675119568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:18,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:18,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-12 10:32:18,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173782926] [2022-07-12 10:32:18,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:18,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:32:18,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:18,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:32:18,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 10:32:18,738 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:32:18,739 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) [2022-07-12 10:32:18,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:18,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:32:18,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:24,155 INFO L129 PetriNetUnfolder]: 1038/3918 cut-off events. [2022-07-12 10:32:24,155 INFO L130 PetriNetUnfolder]: For 147623/147654 co-relation queries the response was YES. [2022-07-12 10:32:24,191 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. [2022-07-12 10:32:24,208 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 328 selfloop transitions, 912 changer transitions 6/1288 dead transitions. [2022-07-12 10:32:24,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 1288 transitions, 37868 flow [2022-07-12 10:32:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-12 10:32:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-07-12 10:32:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 5355 transitions. [2022-07-12 10:32:24,211 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6202942198540484 [2022-07-12 10:32:24,211 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 5355 transitions. [2022-07-12 10:32:24,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 5355 transitions. [2022-07-12 10:32:24,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:24,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 5355 transitions. [2022-07-12 10:32:24,216 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) [2022-07-12 10:32:24,220 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) [2022-07-12 10:32:24,221 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) [2022-07-12 10:32:24,221 INFO L186 Difference]: Start difference. First operand has 716 places, 1123 transitions, 32239 flow. Second operand 97 states and 5355 transitions. [2022-07-12 10:32:24,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 1288 transitions, 37868 flow [2022-07-12 10:32:24,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 792 places, 1288 transitions, 37287 flow, removed 29 selfloop flow, removed 17 redundant places. [2022-07-12 10:32:24,914 INFO L242 Difference]: Finished difference. Result has 803 places, 1209 transitions, 36217 flow [2022-07-12 10:32:24,915 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} [2022-07-12 10:32:24,915 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 724 predicate places. [2022-07-12 10:32:24,915 INFO L495 AbstractCegarLoop]: Abstraction has has 803 places, 1209 transitions, 36217 flow [2022-07-12 10:32:24,916 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) [2022-07-12 10:32:24,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:24,916 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] [2022-07-12 10:32:24,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:25,116 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 [2022-07-12 10:32:25,117 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:25,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:25,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1738018965, now seen corresponding path program 19 times [2022-07-12 10:32:25,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:25,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204567412] [2022-07-12 10:32:25,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:25,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:25,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:25,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204567412] [2022-07-12 10:32:25,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204567412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:25,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121044999] [2022-07-12 10:32:25,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:32:25,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:25,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:25,338 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) [2022-07-12 10:32:25,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 10:32:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:25,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 10:32:25,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:25,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:26,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121044999] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:26,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:26,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-12 10:32:26,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607115200] [2022-07-12 10:32:26,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:26,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:32:26,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:26,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:32:26,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 10:32:26,123 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:32:26,124 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) [2022-07-12 10:32:26,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:26,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:32:26,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:30,291 INFO L129 PetriNetUnfolder]: 1258/4504 cut-off events. [2022-07-12 10:32:30,291 INFO L130 PetriNetUnfolder]: For 182484/182502 co-relation queries the response was YES. [2022-07-12 10:32:30,337 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. [2022-07-12 10:32:30,356 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 466 selfloop transitions, 955 changer transitions 6/1469 dead transitions. [2022-07-12 10:32:30,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 858 places, 1469 transitions, 44672 flow [2022-07-12 10:32:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 10:32:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-12 10:32:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3541 transitions. [2022-07-12 10:32:30,359 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6315320135544855 [2022-07-12 10:32:30,359 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3541 transitions. [2022-07-12 10:32:30,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3541 transitions. [2022-07-12 10:32:30,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:30,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3541 transitions. [2022-07-12 10:32:30,363 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) [2022-07-12 10:32:30,366 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) [2022-07-12 10:32:30,366 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) [2022-07-12 10:32:30,366 INFO L186 Difference]: Start difference. First operand has 803 places, 1209 transitions, 36217 flow. Second operand 63 states and 3541 transitions. [2022-07-12 10:32:30,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 858 places, 1469 transitions, 44672 flow [2022-07-12 10:32:31,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 1469 transitions, 43816 flow, removed 213 selfloop flow, removed 48 redundant places. [2022-07-12 10:32:31,341 INFO L242 Difference]: Finished difference. Result has 821 places, 1376 transitions, 42784 flow [2022-07-12 10:32:31,341 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} [2022-07-12 10:32:31,342 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 742 predicate places. [2022-07-12 10:32:31,342 INFO L495 AbstractCegarLoop]: Abstraction has has 821 places, 1376 transitions, 42784 flow [2022-07-12 10:32:31,342 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) [2022-07-12 10:32:31,342 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:31,342 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] [2022-07-12 10:32:31,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:31,543 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 [2022-07-12 10:32:31,543 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash -958803233, now seen corresponding path program 1 times [2022-07-12 10:32:31,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:31,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393370516] [2022-07-12 10:32:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:31,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:31,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:31,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393370516] [2022-07-12 10:32:31,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393370516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:31,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299855943] [2022-07-12 10:32:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:31,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:31,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:31,707 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) [2022-07-12 10:32:31,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 10:32:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:31,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 10:32:31,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:32,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:32,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299855943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:32,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:32,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-07-12 10:32:32,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292175599] [2022-07-12 10:32:32,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:32,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:32:32,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:32,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:32:32,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 10:32:32,353 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-07-12 10:32:32,354 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) [2022-07-12 10:32:32,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:32,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-07-12 10:32:32,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:35,735 INFO L129 PetriNetUnfolder]: 1475/4935 cut-off events. [2022-07-12 10:32:35,735 INFO L130 PetriNetUnfolder]: For 217916/217944 co-relation queries the response was YES. [2022-07-12 10:32:35,796 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. [2022-07-12 10:32:35,821 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 566 selfloop transitions, 909 changer transitions 27/1543 dead transitions. [2022-07-12 10:32:35,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 867 places, 1543 transitions, 49144 flow [2022-07-12 10:32:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-12 10:32:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-12 10:32:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3010 transitions. [2022-07-12 10:32:35,823 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.626300457761132 [2022-07-12 10:32:35,823 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3010 transitions. [2022-07-12 10:32:35,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3010 transitions. [2022-07-12 10:32:35,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:35,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3010 transitions. [2022-07-12 10:32:35,826 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) [2022-07-12 10:32:35,828 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) [2022-07-12 10:32:35,828 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) [2022-07-12 10:32:35,829 INFO L186 Difference]: Start difference. First operand has 821 places, 1376 transitions, 42784 flow. Second operand 54 states and 3010 transitions. [2022-07-12 10:32:35,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 867 places, 1543 transitions, 49144 flow [2022-07-12 10:32:36,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 837 places, 1543 transitions, 47864 flow, removed 182 selfloop flow, removed 30 redundant places. [2022-07-12 10:32:37,100 INFO L242 Difference]: Finished difference. Result has 860 places, 1424 transitions, 45757 flow [2022-07-12 10:32:37,101 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} [2022-07-12 10:32:37,102 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 781 predicate places. [2022-07-12 10:32:37,102 INFO L495 AbstractCegarLoop]: Abstraction has has 860 places, 1424 transitions, 45757 flow [2022-07-12 10:32:37,102 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) [2022-07-12 10:32:37,102 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:37,102 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] [2022-07-12 10:32:37,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:37,307 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 [2022-07-12 10:32:37,308 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1067754541, now seen corresponding path program 20 times [2022-07-12 10:32:37,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:37,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569791159] [2022-07-12 10:32:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:37,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:37,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:37,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569791159] [2022-07-12 10:32:37,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569791159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:37,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786957944] [2022-07-12 10:32:37,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:32:37,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:37,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:37,505 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) [2022-07-12 10:32:37,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 10:32:37,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:32:37,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:37,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 10:32:37,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:38,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:38,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786957944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:38,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:38,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-07-12 10:32:38,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747051091] [2022-07-12 10:32:38,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:38,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 10:32:38,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 10:32:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 10:32:38,512 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:32:38,513 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) [2022-07-12 10:32:38,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:38,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:32:38,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:43,544 INFO L129 PetriNetUnfolder]: 1422/4976 cut-off events. [2022-07-12 10:32:43,544 INFO L130 PetriNetUnfolder]: For 249357/249379 co-relation queries the response was YES. [2022-07-12 10:32:43,612 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. [2022-07-12 10:32:43,638 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 479 selfloop transitions, 1093 changer transitions 18/1633 dead transitions. [2022-07-12 10:32:43,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 919 places, 1633 transitions, 55107 flow [2022-07-12 10:32:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-12 10:32:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-07-12 10:32:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4296 transitions. [2022-07-12 10:32:43,641 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6268787392382899 [2022-07-12 10:32:43,641 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4296 transitions. [2022-07-12 10:32:43,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4296 transitions. [2022-07-12 10:32:43,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:43,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4296 transitions. [2022-07-12 10:32:43,645 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) [2022-07-12 10:32:43,648 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) [2022-07-12 10:32:43,648 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) [2022-07-12 10:32:43,648 INFO L186 Difference]: Start difference. First operand has 860 places, 1424 transitions, 45757 flow. Second operand 77 states and 4296 transitions. [2022-07-12 10:32:43,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 919 places, 1633 transitions, 55107 flow [2022-07-12 10:32:45,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 895 places, 1633 transitions, 54294 flow, removed 121 selfloop flow, removed 24 redundant places. [2022-07-12 10:32:45,070 INFO L242 Difference]: Finished difference. Result has 911 places, 1514 transitions, 51392 flow [2022-07-12 10:32:45,070 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} [2022-07-12 10:32:45,071 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 832 predicate places. [2022-07-12 10:32:45,071 INFO L495 AbstractCegarLoop]: Abstraction has has 911 places, 1514 transitions, 51392 flow [2022-07-12 10:32:45,071 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) [2022-07-12 10:32:45,071 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:45,072 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] [2022-07-12 10:32:45,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:45,275 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 [2022-07-12 10:32:45,275 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1145489427, now seen corresponding path program 21 times [2022-07-12 10:32:45,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:45,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071446981] [2022-07-12 10:32:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:45,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:45,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:45,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071446981] [2022-07-12 10:32:45,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071446981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:45,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840436527] [2022-07-12 10:32:45,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:32:45,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:45,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:45,519 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) [2022-07-12 10:32:45,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 10:32:45,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:32:45,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:45,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 10:32:45,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:45,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:46,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840436527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:46,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:46,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-12 10:32:46,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498023885] [2022-07-12 10:32:46,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:46,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 10:32:46,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 10:32:46,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1768, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 10:32:46,380 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:32:46,381 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) [2022-07-12 10:32:46,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:46,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:32:46,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:52,451 INFO L129 PetriNetUnfolder]: 1516/5294 cut-off events. [2022-07-12 10:32:52,452 INFO L130 PetriNetUnfolder]: For 291069/291091 co-relation queries the response was YES. [2022-07-12 10:32:52,520 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. [2022-07-12 10:32:52,549 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 616 selfloop transitions, 1139 changer transitions 13/1811 dead transitions. [2022-07-12 10:32:52,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 1811 transitions, 62960 flow [2022-07-12 10:32:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-12 10:32:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-12 10:32:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 5231 transitions. [2022-07-12 10:32:52,552 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6319922677298538 [2022-07-12 10:32:52,552 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 5231 transitions. [2022-07-12 10:32:52,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 5231 transitions. [2022-07-12 10:32:52,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:52,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 5231 transitions. [2022-07-12 10:32:52,556 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) [2022-07-12 10:32:52,560 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) [2022-07-12 10:32:52,560 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) [2022-07-12 10:32:52,560 INFO L186 Difference]: Start difference. First operand has 911 places, 1514 transitions, 51392 flow. Second operand 93 states and 5231 transitions. [2022-07-12 10:32:52,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 1811 transitions, 62960 flow [2022-07-12 10:32:54,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 961 places, 1811 transitions, 61411 flow, removed 341 selfloop flow, removed 35 redundant places. [2022-07-12 10:32:54,204 INFO L242 Difference]: Finished difference. Result has 988 places, 1630 transitions, 57509 flow [2022-07-12 10:32:54,205 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} [2022-07-12 10:32:54,206 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 909 predicate places. [2022-07-12 10:32:54,206 INFO L495 AbstractCegarLoop]: Abstraction has has 988 places, 1630 transitions, 57509 flow [2022-07-12 10:32:54,206 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) [2022-07-12 10:32:54,207 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:54,207 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] [2022-07-12 10:32:54,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:54,416 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 [2022-07-12 10:32:54,416 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash 491254805, now seen corresponding path program 22 times [2022-07-12 10:32:54,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:54,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675833099] [2022-07-12 10:32:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:54,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:54,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675833099] [2022-07-12 10:32:54,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675833099] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:54,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175678086] [2022-07-12 10:32:54,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:32:54,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:54,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:54,646 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) [2022-07-12 10:32:54,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 10:32:54,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:32:54,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:54,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 10:32:54,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:55,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:55,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175678086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:55,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:55,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-12 10:32:55,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343689820] [2022-07-12 10:32:55,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:55,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 10:32:55,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 10:32:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1773, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 10:32:55,542 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:32:55,543 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) [2022-07-12 10:32:55,543 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:55,543 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:32:55,543 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:33:02,163 INFO L129 PetriNetUnfolder]: 1679/5782 cut-off events. [2022-07-12 10:33:02,163 INFO L130 PetriNetUnfolder]: For 402967/402980 co-relation queries the response was YES. [2022-07-12 10:33:02,244 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. [2022-07-12 10:33:02,276 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 541 selfloop transitions, 1341 changer transitions 12/1937 dead transitions. [2022-07-12 10:33:02,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1088 places, 1937 transitions, 71643 flow [2022-07-12 10:33:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-07-12 10:33:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-07-12 10:33:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5929 transitions. [2022-07-12 10:33:02,280 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6225979208232699 [2022-07-12 10:33:02,280 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5929 transitions. [2022-07-12 10:33:02,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5929 transitions. [2022-07-12 10:33:02,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:33:02,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5929 transitions. [2022-07-12 10:33:02,284 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) [2022-07-12 10:33:02,288 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) [2022-07-12 10:33:02,288 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) [2022-07-12 10:33:02,288 INFO L186 Difference]: Start difference. First operand has 988 places, 1630 transitions, 57509 flow. Second operand 107 states and 5929 transitions. [2022-07-12 10:33:02,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1088 places, 1937 transitions, 71643 flow [2022-07-12 10:33:04,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1028 places, 1937 transitions, 68842 flow, removed 361 selfloop flow, removed 60 redundant places. [2022-07-12 10:33:04,585 INFO L242 Difference]: Finished difference. Result has 1051 places, 1813 transitions, 65986 flow [2022-07-12 10:33:04,587 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} [2022-07-12 10:33:04,587 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 972 predicate places. [2022-07-12 10:33:04,587 INFO L495 AbstractCegarLoop]: Abstraction has has 1051 places, 1813 transitions, 65986 flow [2022-07-12 10:33:04,587 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) [2022-07-12 10:33:04,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:33:04,588 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] [2022-07-12 10:33:04,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 10:33:04,797 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 [2022-07-12 10:33:04,797 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:33:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:33:04,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1756563129, now seen corresponding path program 23 times [2022-07-12 10:33:04,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:33:04,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319979276] [2022-07-12 10:33:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:33:04,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:33:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:33:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:05,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:33:05,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319979276] [2022-07-12 10:33:05,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319979276] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:33:05,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191994763] [2022-07-12 10:33:05,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:33:05,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:33:05,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:33:05,047 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) [2022-07-12 10:33:05,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 10:33:05,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:33:05,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:33:05,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 10:33:05,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:33:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:05,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:33:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:05,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191994763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:33:05,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:33:05,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-12 10:33:05,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487716180] [2022-07-12 10:33:05,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:33:05,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 10:33:05,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:33:05,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 10:33:05,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 10:33:05,958 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:33:05,960 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) [2022-07-12 10:33:05,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:33:05,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:33:05,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:33:15,379 INFO L129 PetriNetUnfolder]: 1852/6339 cut-off events. [2022-07-12 10:33:15,379 INFO L130 PetriNetUnfolder]: For 460600/460613 co-relation queries the response was YES. [2022-07-12 10:33:15,469 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. [2022-07-12 10:33:15,505 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 560 selfloop transitions, 1583 changer transitions 12/2198 dead transitions. [2022-07-12 10:33:15,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1184 places, 2198 transitions, 82820 flow [2022-07-12 10:33:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-07-12 10:33:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2022-07-12 10:33:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 7779 transitions. [2022-07-12 10:33:15,510 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6243178170144462 [2022-07-12 10:33:15,510 INFO L72 ComplementDD]: Start complementDD. Operand 140 states and 7779 transitions. [2022-07-12 10:33:15,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 140 states and 7779 transitions. [2022-07-12 10:33:15,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:33:15,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 140 states and 7779 transitions. [2022-07-12 10:33:15,516 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) [2022-07-12 10:33:15,521 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) [2022-07-12 10:33:15,522 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) [2022-07-12 10:33:15,522 INFO L186 Difference]: Start difference. First operand has 1051 places, 1813 transitions, 65986 flow. Second operand 140 states and 7779 transitions. [2022-07-12 10:33:15,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1184 places, 2198 transitions, 82820 flow [2022-07-12 10:33:18,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1147 places, 2198 transitions, 79762 flow, removed 210 selfloop flow, removed 37 redundant places. [2022-07-12 10:33:18,309 INFO L242 Difference]: Finished difference. Result has 1175 places, 2013 transitions, 75496 flow [2022-07-12 10:33:18,310 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} [2022-07-12 10:33:18,310 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1096 predicate places. [2022-07-12 10:33:18,310 INFO L495 AbstractCegarLoop]: Abstraction has has 1175 places, 2013 transitions, 75496 flow [2022-07-12 10:33:18,311 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) [2022-07-12 10:33:18,311 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:33:18,311 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] [2022-07-12 10:33:18,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 10:33:18,515 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 [2022-07-12 10:33:18,515 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:33:18,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:33:18,515 INFO L85 PathProgramCache]: Analyzing trace with hash -584407551, now seen corresponding path program 24 times [2022-07-12 10:33:18,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:33:18,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129154447] [2022-07-12 10:33:18,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:33:18,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:33:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:33:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:18,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:33:18,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129154447] [2022-07-12 10:33:18,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129154447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:33:18,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974826782] [2022-07-12 10:33:18,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:33:18,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:33:18,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:33:18,712 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) [2022-07-12 10:33:18,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 10:33:18,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 10:33:18,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:33:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 10:33:18,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:33:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:19,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:33:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:19,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974826782] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:33:19,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:33:19,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-07-12 10:33:19,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131453499] [2022-07-12 10:33:19,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:33:19,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 10:33:19,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:33:19,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 10:33:19,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 10:33:19,807 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:33:19,809 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) [2022-07-12 10:33:19,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:33:19,809 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:33:19,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:33:37,078 INFO L129 PetriNetUnfolder]: 2052/7011 cut-off events. [2022-07-12 10:33:37,079 INFO L130 PetriNetUnfolder]: For 548595/548608 co-relation queries the response was YES. [2022-07-12 10:33:37,189 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. [2022-07-12 10:33:37,231 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 502 selfloop transitions, 1974 changer transitions 13/2532 dead transitions. [2022-07-12 10:33:37,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1408 places, 2532 transitions, 95276 flow [2022-07-12 10:33:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2022-07-12 10:33:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2022-07-12 10:33:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 13314 transitions. [2022-07-12 10:33:37,239 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.623314606741573 [2022-07-12 10:33:37,239 INFO L72 ComplementDD]: Start complementDD. Operand 240 states and 13314 transitions. [2022-07-12 10:33:37,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 240 states and 13314 transitions. [2022-07-12 10:33:37,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:33:37,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 240 states and 13314 transitions. [2022-07-12 10:33:37,250 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) [2022-07-12 10:33:37,261 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) [2022-07-12 10:33:37,263 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) [2022-07-12 10:33:37,263 INFO L186 Difference]: Start difference. First operand has 1175 places, 2013 transitions, 75496 flow. Second operand 240 states and 13314 transitions. [2022-07-12 10:33:37,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1408 places, 2532 transitions, 95276 flow [2022-07-12 10:33:41,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1351 places, 2532 transitions, 93348 flow, removed 450 selfloop flow, removed 57 redundant places. [2022-07-12 10:33:41,069 INFO L242 Difference]: Finished difference. Result has 1384 places, 2276 transitions, 88743 flow [2022-07-12 10:33:41,071 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} [2022-07-12 10:33:41,071 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1305 predicate places. [2022-07-12 10:33:41,071 INFO L495 AbstractCegarLoop]: Abstraction has has 1384 places, 2276 transitions, 88743 flow [2022-07-12 10:33:41,072 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) [2022-07-12 10:33:41,072 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:33:41,072 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] [2022-07-12 10:33:41,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 10:33:41,272 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 [2022-07-12 10:33:41,272 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:33:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:33:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1538828033, now seen corresponding path program 25 times [2022-07-12 10:33:41,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:33:41,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085318265] [2022-07-12 10:33:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:33:41,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:33:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:33:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:41,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:33:41,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085318265] [2022-07-12 10:33:41,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085318265] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:33:41,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65429250] [2022-07-12 10:33:41,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:33:41,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:33:41,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:33:41,494 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) [2022-07-12 10:33:41,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 10:33:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:33:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 10:33:41,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:33:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:41,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:33:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:42,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65429250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:33:42,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:33:42,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-12 10:33:42,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110750966] [2022-07-12 10:33:42,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:33:42,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 10:33:42,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:33:42,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 10:33:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1774, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 10:33:42,386 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:33:42,388 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) [2022-07-12 10:33:42,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:33:42,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:33:42,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:33:52,055 INFO L129 PetriNetUnfolder]: 2269/7606 cut-off events. [2022-07-12 10:33:52,055 INFO L130 PetriNetUnfolder]: For 747642/747664 co-relation queries the response was YES. [2022-07-12 10:33:52,203 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. [2022-07-12 10:33:52,266 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 714 selfloop transitions, 1864 changer transitions 12/2633 dead transitions. [2022-07-12 10:33:52,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1499 places, 2633 transitions, 108467 flow [2022-07-12 10:33:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-07-12 10:33:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2022-07-12 10:33:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 6759 transitions. [2022-07-12 10:33:52,270 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6224903297108123 [2022-07-12 10:33:52,271 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 6759 transitions. [2022-07-12 10:33:52,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 6759 transitions. [2022-07-12 10:33:52,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:33:52,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 6759 transitions. [2022-07-12 10:33:52,277 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) [2022-07-12 10:33:52,281 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) [2022-07-12 10:33:52,282 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) [2022-07-12 10:33:52,282 INFO L186 Difference]: Start difference. First operand has 1384 places, 2276 transitions, 88743 flow. Second operand 122 states and 6759 transitions. [2022-07-12 10:33:52,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1499 places, 2633 transitions, 108467 flow [2022-07-12 10:33:58,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1385 places, 2633 transitions, 105000 flow, removed 709 selfloop flow, removed 114 redundant places. [2022-07-12 10:33:58,090 INFO L242 Difference]: Finished difference. Result has 1408 places, 2518 transitions, 101963 flow [2022-07-12 10:33:58,092 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} [2022-07-12 10:33:58,092 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1329 predicate places. [2022-07-12 10:33:58,092 INFO L495 AbstractCegarLoop]: Abstraction has has 1408 places, 2518 transitions, 101963 flow [2022-07-12 10:33:58,093 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) [2022-07-12 10:33:58,093 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:33:58,093 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] [2022-07-12 10:33:58,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 10:33:58,293 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 [2022-07-12 10:33:58,293 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:33:58,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:33:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1411712641, now seen corresponding path program 26 times [2022-07-12 10:33:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:33:58,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705381293] [2022-07-12 10:33:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:33:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:33:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:33:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:58,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:33:58,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705381293] [2022-07-12 10:33:58,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705381293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:33:58,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625334994] [2022-07-12 10:33:58,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:33:58,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:33:58,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:33:58,547 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) [2022-07-12 10:33:58,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 10:33:58,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:33:58,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:33:58,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 10:33:58,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:33:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:59,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:33:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:59,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625334994] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:33:59,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:33:59,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-12 10:33:59,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367542626] [2022-07-12 10:33:59,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:33:59,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 10:33:59,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:33:59,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 10:33:59,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 10:33:59,423 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:33:59,424 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) [2022-07-12 10:33:59,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:33:59,424 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:33:59,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:34:12,654 INFO L129 PetriNetUnfolder]: 2505/8363 cut-off events. [2022-07-12 10:34:12,654 INFO L130 PetriNetUnfolder]: For 857566/857579 co-relation queries the response was YES. [2022-07-12 10:34:12,799 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. [2022-07-12 10:34:12,855 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 677 selfloop transitions, 2270 changer transitions 12/3002 dead transitions. [2022-07-12 10:34:12,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1569 places, 3002 transitions, 125549 flow [2022-07-12 10:34:12,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-07-12 10:34:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2022-07-12 10:34:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 9368 transitions. [2022-07-12 10:34:12,860 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6265382557517389 [2022-07-12 10:34:12,860 INFO L72 ComplementDD]: Start complementDD. Operand 168 states and 9368 transitions. [2022-07-12 10:34:12,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 168 states and 9368 transitions. [2022-07-12 10:34:12,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:34:12,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 168 states and 9368 transitions. [2022-07-12 10:34:12,867 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) [2022-07-12 10:34:12,874 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) [2022-07-12 10:34:12,875 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) [2022-07-12 10:34:12,875 INFO L186 Difference]: Start difference. First operand has 1408 places, 2518 transitions, 101963 flow. Second operand 168 states and 9368 transitions. [2022-07-12 10:34:12,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1569 places, 3002 transitions, 125549 flow [2022-07-12 10:34:19,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1522 places, 3002 transitions, 123241 flow, removed 289 selfloop flow, removed 47 redundant places. [2022-07-12 10:34:19,881 INFO L242 Difference]: Finished difference. Result has 1548 places, 2784 transitions, 117621 flow [2022-07-12 10:34:19,884 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} [2022-07-12 10:34:19,884 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1469 predicate places. [2022-07-12 10:34:19,884 INFO L495 AbstractCegarLoop]: Abstraction has has 1548 places, 2784 transitions, 117621 flow [2022-07-12 10:34:19,885 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) [2022-07-12 10:34:19,885 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:34:19,885 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] [2022-07-12 10:34:19,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 10:34:20,099 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 [2022-07-12 10:34:20,099 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:34:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:34:20,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1519795649, now seen corresponding path program 2 times [2022-07-12 10:34:20,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:34:20,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439286488] [2022-07-12 10:34:20,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:34:20,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:34:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:34:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:34:20,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:34:20,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439286488] [2022-07-12 10:34:20,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439286488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:34:20,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672228930] [2022-07-12 10:34:20,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:34:20,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:34:20,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:34:20,265 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) [2022-07-12 10:34:20,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 10:34:20,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:34:20,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:34:20,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 10:34:20,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:34:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:34:20,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:34:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:34:21,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672228930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:34:21,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:34:21,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2022-07-12 10:34:21,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371158144] [2022-07-12 10:34:21,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:34:21,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 10:34:21,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:34:21,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 10:34:21,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 10:34:21,071 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-07-12 10:34:21,072 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) [2022-07-12 10:34:21,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:34:21,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-07-12 10:34:21,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:34:31,302 INFO L129 PetriNetUnfolder]: 3075/9846 cut-off events. [2022-07-12 10:34:31,302 INFO L130 PetriNetUnfolder]: For 1101301/1101314 co-relation queries the response was YES. [2022-07-12 10:34:31,509 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. [2022-07-12 10:34:31,588 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1207 selfloop transitions, 1767 changer transitions 65/3080 dead transitions. [2022-07-12 10:34:31,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1599 places, 3080 transitions, 134368 flow [2022-07-12 10:34:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-12 10:34:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-12 10:34:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3230 transitions. [2022-07-12 10:34:31,591 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.625726462611391 [2022-07-12 10:34:31,591 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3230 transitions. [2022-07-12 10:34:31,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3230 transitions. [2022-07-12 10:34:31,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:34:31,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3230 transitions. [2022-07-12 10:34:31,594 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) [2022-07-12 10:34:31,596 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) [2022-07-12 10:34:31,596 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) [2022-07-12 10:34:31,596 INFO L186 Difference]: Start difference. First operand has 1548 places, 2784 transitions, 117621 flow. Second operand 58 states and 3230 transitions. [2022-07-12 10:34:31,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1599 places, 3080 transitions, 134368 flow [2022-07-12 10:34:41,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1534 places, 3080 transitions, 131329 flow, removed 443 selfloop flow, removed 65 redundant places. [2022-07-12 10:34:41,770 INFO L242 Difference]: Finished difference. Result has 1546 places, 2878 transitions, 125339 flow [2022-07-12 10:34:41,772 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} [2022-07-12 10:34:41,772 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1467 predicate places. [2022-07-12 10:34:41,772 INFO L495 AbstractCegarLoop]: Abstraction has has 1546 places, 2878 transitions, 125339 flow [2022-07-12 10:34:41,773 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) [2022-07-12 10:34:41,773 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:34:41,773 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] [2022-07-12 10:34:41,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-12 10:34:41,980 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 [2022-07-12 10:34:41,980 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:34:41,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:34:41,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1093495597, now seen corresponding path program 27 times [2022-07-12 10:34:41,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:34:41,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109520948] [2022-07-12 10:34:41,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:34:41,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:34:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:34:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:34:42,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:34:42,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109520948] [2022-07-12 10:34:42,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109520948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:34:42,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908621194] [2022-07-12 10:34:42,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:34:42,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:34:42,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:34:42,182 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) [2022-07-12 10:34:42,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 10:34:42,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:34:42,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:34:42,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 10:34:42,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:34:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:34:42,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:34:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:34:43,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908621194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:34:43,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:34:43,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-07-12 10:34:43,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271250402] [2022-07-12 10:34:43,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:34:43,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 10:34:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:34:43,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 10:34:43,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 10:34:43,250 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-12 10:34:43,251 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) [2022-07-12 10:34:43,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:34:43,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-12 10:34:43,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:35:05,620 INFO L129 PetriNetUnfolder]: 2753/9273 cut-off events. [2022-07-12 10:35:05,620 INFO L130 PetriNetUnfolder]: For 1095559/1095572 co-relation queries the response was YES. [2022-07-12 10:35:05,880 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. [2022-07-12 10:35:05,947 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 574 selfloop transitions, 2692 changer transitions 18/3327 dead transitions. [2022-07-12 10:35:05,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1791 places, 3327 transitions, 145264 flow [2022-07-12 10:35:05,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-07-12 10:35:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2022-07-12 10:35:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 14499 transitions. [2022-07-12 10:35:05,954 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6241766757070902 [2022-07-12 10:35:05,954 INFO L72 ComplementDD]: Start complementDD. Operand 261 states and 14499 transitions. [2022-07-12 10:35:05,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 261 states and 14499 transitions. [2022-07-12 10:35:05,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:35:05,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 261 states and 14499 transitions. [2022-07-12 10:35:05,965 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) [2022-07-12 10:35:05,975 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) [2022-07-12 10:35:05,976 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) [2022-07-12 10:35:05,976 INFO L186 Difference]: Start difference. First operand has 1546 places, 2878 transitions, 125339 flow. Second operand 261 states and 14499 transitions. [2022-07-12 10:35:05,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1791 places, 3327 transitions, 145264 flow [2022-07-12 10:35:15,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1759 places, 3327 transitions, 144373 flow, removed 139 selfloop flow, removed 32 redundant places. [2022-07-12 10:35:15,248 INFO L242 Difference]: Finished difference. Result has 1789 places, 3042 transitions, 138328 flow [2022-07-12 10:35:15,250 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} [2022-07-12 10:35:15,251 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1710 predicate places. [2022-07-12 10:35:15,251 INFO L495 AbstractCegarLoop]: Abstraction has has 1789 places, 3042 transitions, 138328 flow [2022-07-12 10:35:15,251 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) [2022-07-12 10:35:15,251 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:35:15,251 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, 1, 1, 1, 1, 1] [2022-07-12 10:35:15,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0