./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/test-easy1.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 fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:57:56,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:57:56,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:57:56,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:57:56,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:57:56,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:57:56,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:57:56,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:57:56,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:57:56,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:57:56,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:57:56,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:57:56,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:57:56,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:57:56,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:57:56,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:57:56,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:57:56,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:57:56,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:57:56,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:57:56,820 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:57:56,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:57:56,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:57:56,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:57:56,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:57:56,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:57:56,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:57:56,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:57:56,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:57:56,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:57:56,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:57:56,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:57:56,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:57:56,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:57:56,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:57:56,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:57:56,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:57:56,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:57:56,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:57:56,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:57:56,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:57:56,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:57:56,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:57:56,876 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:57:56,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:57:56,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:57:56,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:57:56,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:57:56,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:57:56,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:57:56,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:57:56,879 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:57:56,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:57:56,880 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:57:56,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:57:56,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:57:56,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:57:56,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:57:56,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:57:56,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:57:56,881 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:57:56,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:57:56,882 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:57:56,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:57:56,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:57:56,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:57:56,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:57:56,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:57:56,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:57:56,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:57:56,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:57:56,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:57:56,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:57:56,884 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:57:56,884 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:57:56,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:57:56,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2022-07-22 21:57:57,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:57:57,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:57:57,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:57:57,183 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:57:57,184 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:57:57,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-07-22 21:57:57,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ae2aa0ef/f119c529309b46e398212267c2eaff51/FLAG4252a328b [2022-07-22 21:57:57,644 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:57:57,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-07-22 21:57:57,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ae2aa0ef/f119c529309b46e398212267c2eaff51/FLAG4252a328b [2022-07-22 21:57:57,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ae2aa0ef/f119c529309b46e398212267c2eaff51 [2022-07-22 21:57:57,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:57:57,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:57:57,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:57:57,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:57:57,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:57:57,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aa35438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57, skipping insertion in model container [2022-07-22 21:57:57,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:57:57,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:57:57,818 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/test-easy1.wvr.c[1876,1889] [2022-07-22 21:57:57,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:57:57,826 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:57:57,848 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/test-easy1.wvr.c[1876,1889] [2022-07-22 21:57:57,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:57:57,860 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:57:57,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57 WrapperNode [2022-07-22 21:57:57,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:57:57,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:57:57,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:57:57,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:57:57,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,893 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2022-07-22 21:57:57,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:57:57,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:57:57,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:57:57,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:57:57,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:57:57,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:57:57,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:57:57,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:57:57,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57" (1/1) ... [2022-07-22 21:57:57,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:57:57,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:57,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:57:57,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:57:58,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:57:58,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:57:58,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:57:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:57:58,019 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:57:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:57:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:57:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:57:58,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:57:58,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:57:58,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:57:58,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:57:58,022 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:57:58,108 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:57:58,109 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:57:58,275 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:57:58,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:57:58,282 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:57:58,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:57:58 BoogieIcfgContainer [2022-07-22 21:57:58,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:57:58,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:57:58,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:57:58,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:57:58,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:57:57" (1/3) ... [2022-07-22 21:57:58,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9315fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:57:58, skipping insertion in model container [2022-07-22 21:57:58,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:57" (2/3) ... [2022-07-22 21:57:58,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9315fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:57:58, skipping insertion in model container [2022-07-22 21:57:58,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:57:58" (3/3) ... [2022-07-22 21:57:58,290 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2022-07-22 21:57:58,294 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:57:58,302 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:57:58,303 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:57:58,303 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:57:58,339 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:57:58,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-07-22 21:57:58,444 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-22 21:57:58,444 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:57:58,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-07-22 21:57:58,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-07-22 21:57:58,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-07-22 21:57:58,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:57:58,480 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@432fb6bd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@9906ca9 [2022-07-22 21:57:58,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:57:58,522 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2022-07-22 21:57:58,522 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:57:58,523 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:58,523 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] [2022-07-22 21:57:58,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:58,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1829802854, now seen corresponding path program 1 times [2022-07-22 21:57:58,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:58,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358718062] [2022-07-22 21:57:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:58,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:58,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:58,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358718062] [2022-07-22 21:57:58,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358718062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:57:58,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:57:58,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:57:58,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842482338] [2022-07-22 21:57:58,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:58,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:57:58,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:58,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:57:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:57:58,765 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2022-07-22 21:57:58,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:58,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:58,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2022-07-22 21:57:58,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:58,806 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2022-07-22 21:57:58,807 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:57:58,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-07-22 21:57:58,808 INFO L132 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-07-22 21:57:58,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2022-07-22 21:57:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:57:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:57:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2022-07-22 21:57:58,822 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2022-07-22 21:57:58,823 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2022-07-22 21:57:58,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2022-07-22 21:57:58,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:58,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2022-07-22 21:57:58,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:58,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:58,835 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:58,837 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2022-07-22 21:57:58,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2022-07-22 21:57:58,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:57:58,842 INFO L242 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-07-22 21:57:58,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-07-22 21:57:58,846 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-07-22 21:57:58,847 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-07-22 21:57:58,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:58,847 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:58,848 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] [2022-07-22 21:57:58,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:57:58,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:58,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:58,849 INFO L85 PathProgramCache]: Analyzing trace with hash 845260518, now seen corresponding path program 1 times [2022-07-22 21:57:58,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:58,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767546905] [2022-07-22 21:57:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:58,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:59,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:59,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767546905] [2022-07-22 21:57:59,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767546905] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:57:59,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:57:59,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:57:59,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828641642] [2022-07-22 21:57:59,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:59,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:57:59,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:57:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:57:59,148 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-22 21:57:59,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:59,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:59,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-22 21:57:59,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:59,345 INFO L129 PetriNetUnfolder]: 62/212 cut-off events. [2022-07-22 21:57:59,351 INFO L130 PetriNetUnfolder]: For 11/23 co-relation queries the response was YES. [2022-07-22 21:57:59,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 212 events. 62/212 cut-off events. For 11/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 733 event pairs, 30 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 352. Up to 85 conditions per place. [2022-07-22 21:57:59,354 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-07-22 21:57:59,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2022-07-22 21:57:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:57:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:57:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2022-07-22 21:57:59,366 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2022-07-22 21:57:59,367 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2022-07-22 21:57:59,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2022-07-22 21:57:59,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:59,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2022-07-22 21:57:59,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:59,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:59,376 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:59,376 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2022-07-22 21:57:59,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2022-07-22 21:57:59,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:57:59,381 INFO L242 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2022-07-22 21:57:59,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2022-07-22 21:57:59,382 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-07-22 21:57:59,382 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2022-07-22 21:57:59,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:59,383 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:59,384 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] [2022-07-22 21:57:59,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:57:59,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:59,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1873293087, now seen corresponding path program 1 times [2022-07-22 21:57:59,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:59,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541958963] [2022-07-22 21:57:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:59,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:59,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:59,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541958963] [2022-07-22 21:57:59,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541958963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:59,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290067297] [2022-07-22 21:57:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:59,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:59,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:59,520 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) [2022-07-22 21:57:59,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:57:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:57:59,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:59,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:59,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290067297] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:59,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:57:59,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-07-22 21:57:59,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039745073] [2022-07-22 21:57:59,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:59,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:57:59,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:59,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:57:59,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:57:59,971 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-22 21:57:59,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:59,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:59,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-22 21:57:59,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:00,061 INFO L129 PetriNetUnfolder]: 62/253 cut-off events. [2022-07-22 21:58:00,062 INFO L130 PetriNetUnfolder]: For 25/32 co-relation queries the response was YES. [2022-07-22 21:58:00,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 253 events. 62/253 cut-off events. For 25/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 974 event pairs, 22 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 459. Up to 89 conditions per place. [2022-07-22 21:58:00,064 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 37 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2022-07-22 21:58:00,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 324 flow [2022-07-22 21:58:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:58:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:58:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2022-07-22 21:58:00,072 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2022-07-22 21:58:00,072 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2022-07-22 21:58:00,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2022-07-22 21:58:00,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:00,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2022-07-22 21:58:00,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,075 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,075 INFO L186 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 6 states and 365 transitions. [2022-07-22 21:58:00,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 324 flow [2022-07-22 21:58:00,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 305 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-22 21:58:00,078 INFO L242 Difference]: Finished difference. Result has 79 places, 73 transitions, 210 flow [2022-07-22 21:58:00,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2022-07-22 21:58:00,079 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-07-22 21:58:00,079 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 210 flow [2022-07-22 21:58:00,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,080 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:00,080 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] [2022-07-22 21:58:00,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:00,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:00,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:00,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2022-07-22 21:58:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:00,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556112604] [2022-07-22 21:58:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:00,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:00,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:00,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556112604] [2022-07-22 21:58:00,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556112604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:00,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:00,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:58:00,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272998825] [2022-07-22 21:58:00,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:00,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:58:00,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:00,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:58:00,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:58:00,421 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-22 21:58:00,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:00,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-22 21:58:00,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:00,507 INFO L129 PetriNetUnfolder]: 55/228 cut-off events. [2022-07-22 21:58:00,510 INFO L130 PetriNetUnfolder]: For 141/155 co-relation queries the response was YES. [2022-07-22 21:58:00,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 228 events. 55/228 cut-off events. For 141/155 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 860 event pairs, 7 based on Foata normal form. 5/229 useless extension candidates. Maximal degree in co-relation 486. Up to 94 conditions per place. [2022-07-22 21:58:00,515 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 7 changer transitions 5/88 dead transitions. [2022-07-22 21:58:00,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 356 flow [2022-07-22 21:58:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:58:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:58:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-07-22 21:58:00,517 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-07-22 21:58:00,518 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-07-22 21:58:00,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-07-22 21:58:00,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:00,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-07-22 21:58:00,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,521 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,522 INFO L186 Difference]: Start difference. First operand has 79 places, 73 transitions, 210 flow. Second operand 6 states and 360 transitions. [2022-07-22 21:58:00,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 356 flow [2022-07-22 21:58:00,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:58:00,528 INFO L242 Difference]: Finished difference. Result has 84 places, 75 transitions, 246 flow [2022-07-22 21:58:00,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2022-07-22 21:58:00,530 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2022-07-22 21:58:00,530 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 246 flow [2022-07-22 21:58:00,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,531 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:00,531 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:58:00,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:58:00,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash 849329763, now seen corresponding path program 1 times [2022-07-22 21:58:00,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:00,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499246932] [2022-07-22 21:58:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:00,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:00,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:00,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499246932] [2022-07-22 21:58:00,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499246932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:00,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:00,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:58:00,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665317662] [2022-07-22 21:58:00,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:00,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:58:00,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:00,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:58:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:58:00,631 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-22 21:58:00,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:00,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-22 21:58:00,632 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:00,718 INFO L129 PetriNetUnfolder]: 50/221 cut-off events. [2022-07-22 21:58:00,718 INFO L130 PetriNetUnfolder]: For 204/208 co-relation queries the response was YES. [2022-07-22 21:58:00,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 221 events. 50/221 cut-off events. For 204/208 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 751 event pairs, 9 based on Foata normal form. 8/225 useless extension candidates. Maximal degree in co-relation 500. Up to 57 conditions per place. [2022-07-22 21:58:00,720 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 33 selfloop transitions, 11 changer transitions 4/91 dead transitions. [2022-07-22 21:58:00,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 402 flow [2022-07-22 21:58:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:58:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:58:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2022-07-22 21:58:00,725 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7091836734693877 [2022-07-22 21:58:00,725 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2022-07-22 21:58:00,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2022-07-22 21:58:00,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:00,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2022-07-22 21:58:00,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.57142857142857) internal successors, (417), 7 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,728 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,729 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 246 flow. Second operand 7 states and 417 transitions. [2022-07-22 21:58:00,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 402 flow [2022-07-22 21:58:00,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 390 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-07-22 21:58:00,734 INFO L242 Difference]: Finished difference. Result has 89 places, 75 transitions, 273 flow [2022-07-22 21:58:00,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2022-07-22 21:58:00,735 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2022-07-22 21:58:00,735 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 273 flow [2022-07-22 21:58:00,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,735 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:00,736 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] [2022-07-22 21:58:00,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:58:00,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:00,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1240332628, now seen corresponding path program 1 times [2022-07-22 21:58:00,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:00,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561545535] [2022-07-22 21:58:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:00,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:00,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:00,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561545535] [2022-07-22 21:58:00,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561545535] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:00,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882146276] [2022-07-22 21:58:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:00,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:00,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:00,902 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) [2022-07-22 21:58:00,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:58:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:00,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:58:00,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:01,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:01,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882146276] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:01,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:01,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-07-22 21:58:01,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220731837] [2022-07-22 21:58:01,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:01,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:58:01,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:01,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:58:01,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:58:01,510 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:01,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 273 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:01,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:01,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:01,512 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:03,397 INFO L129 PetriNetUnfolder]: 201/618 cut-off events. [2022-07-22 21:58:03,398 INFO L130 PetriNetUnfolder]: For 892/892 co-relation queries the response was YES. [2022-07-22 21:58:03,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1725 conditions, 618 events. 201/618 cut-off events. For 892/892 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3354 event pairs, 7 based on Foata normal form. 18/633 useless extension candidates. Maximal degree in co-relation 1713. Up to 96 conditions per place. [2022-07-22 21:58:03,404 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 105 selfloop transitions, 136 changer transitions 4/286 dead transitions. [2022-07-22 21:58:03,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 286 transitions, 1774 flow [2022-07-22 21:58:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-22 21:58:03,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-22 21:58:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3453 transitions. [2022-07-22 21:58:03,414 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6524943310657596 [2022-07-22 21:58:03,414 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3453 transitions. [2022-07-22 21:58:03,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3453 transitions. [2022-07-22 21:58:03,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:03,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3453 transitions. [2022-07-22 21:58:03,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 54.80952380952381) internal successors, (3453), 63 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:03,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:03,439 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:03,439 INFO L186 Difference]: Start difference. First operand has 89 places, 75 transitions, 273 flow. Second operand 63 states and 3453 transitions. [2022-07-22 21:58:03,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 286 transitions, 1774 flow [2022-07-22 21:58:03,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 286 transitions, 1745 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-07-22 21:58:03,452 INFO L242 Difference]: Finished difference. Result has 165 places, 217 transitions, 1436 flow [2022-07-22 21:58:03,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1436, PETRI_PLACES=165, PETRI_TRANSITIONS=217} [2022-07-22 21:58:03,454 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 91 predicate places. [2022-07-22 21:58:03,454 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 217 transitions, 1436 flow [2022-07-22 21:58:03,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:03,455 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:03,456 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] [2022-07-22 21:58:03,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:03,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 21:58:03,676 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:03,676 INFO L85 PathProgramCache]: Analyzing trace with hash -517489446, now seen corresponding path program 2 times [2022-07-22 21:58:03,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:03,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653021180] [2022-07-22 21:58:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:03,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:03,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:03,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653021180] [2022-07-22 21:58:03,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653021180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:03,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953473467] [2022-07-22 21:58:03,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:58:03,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:03,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:03,790 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) [2022-07-22 21:58:03,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:58:03,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:58:03,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:03,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 21:58:03,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:04,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:04,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953473467] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:04,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:04,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-07-22 21:58:04,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049895555] [2022-07-22 21:58:04,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:04,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:58:04,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:04,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:58:04,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:58:04,235 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:04,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 217 transitions, 1436 flow. Second operand has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:04,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:04,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:04,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:04,691 INFO L129 PetriNetUnfolder]: 225/682 cut-off events. [2022-07-22 21:58:04,692 INFO L130 PetriNetUnfolder]: For 3193/3193 co-relation queries the response was YES. [2022-07-22 21:58:04,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2786 conditions, 682 events. 225/682 cut-off events. For 3193/3193 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3920 event pairs, 20 based on Foata normal form. 1/678 useless extension candidates. Maximal degree in co-relation 2755. Up to 180 conditions per place. [2022-07-22 21:58:04,700 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 80 selfloop transitions, 170 changer transitions 15/306 dead transitions. [2022-07-22 21:58:04,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 306 transitions, 2719 flow [2022-07-22 21:58:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 21:58:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-22 21:58:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1093 transitions. [2022-07-22 21:58:04,703 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6505952380952381 [2022-07-22 21:58:04,703 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1093 transitions. [2022-07-22 21:58:04,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1093 transitions. [2022-07-22 21:58:04,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:04,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1093 transitions. [2022-07-22 21:58:04,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 54.65) internal successors, (1093), 20 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:04,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:04,710 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:04,711 INFO L186 Difference]: Start difference. First operand has 165 places, 217 transitions, 1436 flow. Second operand 20 states and 1093 transitions. [2022-07-22 21:58:04,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 306 transitions, 2719 flow [2022-07-22 21:58:04,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 306 transitions, 2517 flow, removed 88 selfloop flow, removed 7 redundant places. [2022-07-22 21:58:04,738 INFO L242 Difference]: Finished difference. Result has 182 places, 270 transitions, 2130 flow [2022-07-22 21:58:04,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2130, PETRI_PLACES=182, PETRI_TRANSITIONS=270} [2022-07-22 21:58:04,739 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 108 predicate places. [2022-07-22 21:58:04,739 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 270 transitions, 2130 flow [2022-07-22 21:58:04,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:04,740 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:04,740 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] [2022-07-22 21:58:04,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:04,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:04,963 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1446740796, now seen corresponding path program 3 times [2022-07-22 21:58:04,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359399197] [2022-07-22 21:58:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:04,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:05,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:05,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359399197] [2022-07-22 21:58:05,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359399197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:05,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070226978] [2022-07-22 21:58:05,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:58:05,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:05,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:05,068 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) [2022-07-22 21:58:05,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:58:05,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:58:05,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:05,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:58:05,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:05,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:05,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070226978] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:05,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:05,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-07-22 21:58:05,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577996651] [2022-07-22 21:58:05,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:05,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:58:05,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:05,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:58:05,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:58:05,609 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:05,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 270 transitions, 2130 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:05,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:05,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:05,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:07,017 INFO L129 PetriNetUnfolder]: 361/1083 cut-off events. [2022-07-22 21:58:07,018 INFO L130 PetriNetUnfolder]: For 6545/6545 co-relation queries the response was YES. [2022-07-22 21:58:07,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4814 conditions, 1083 events. 361/1083 cut-off events. For 6545/6545 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7292 event pairs, 3 based on Foata normal form. 26/1108 useless extension candidates. Maximal degree in co-relation 4778. Up to 167 conditions per place. [2022-07-22 21:58:07,029 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 170 selfloop transitions, 270 changer transitions 79/560 dead transitions. [2022-07-22 21:58:07,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 560 transitions, 5808 flow [2022-07-22 21:58:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 21:58:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-22 21:58:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2524 transitions. [2022-07-22 21:58:07,034 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6532091097308489 [2022-07-22 21:58:07,034 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2524 transitions. [2022-07-22 21:58:07,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2524 transitions. [2022-07-22 21:58:07,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:07,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2524 transitions. [2022-07-22 21:58:07,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.869565217391305) internal successors, (2524), 46 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:07,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:07,085 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:07,085 INFO L186 Difference]: Start difference. First operand has 182 places, 270 transitions, 2130 flow. Second operand 46 states and 2524 transitions. [2022-07-22 21:58:07,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 560 transitions, 5808 flow [2022-07-22 21:58:07,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 560 transitions, 5385 flow, removed 113 selfloop flow, removed 9 redundant places. [2022-07-22 21:58:07,127 INFO L242 Difference]: Finished difference. Result has 243 places, 426 transitions, 4246 flow [2022-07-22 21:58:07,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=4246, PETRI_PLACES=243, PETRI_TRANSITIONS=426} [2022-07-22 21:58:07,130 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 169 predicate places. [2022-07-22 21:58:07,130 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 426 transitions, 4246 flow [2022-07-22 21:58:07,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:07,131 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:07,131 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] [2022-07-22 21:58:07,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:07,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:07,356 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:07,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1847654156, now seen corresponding path program 4 times [2022-07-22 21:58:07,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:07,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384848523] [2022-07-22 21:58:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:07,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:07,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:07,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384848523] [2022-07-22 21:58:07,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384848523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:07,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:07,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-22 21:58:07,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381446633] [2022-07-22 21:58:07,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:07,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:58:07,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:07,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:58:07,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:58:07,480 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:07,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 426 transitions, 4246 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:07,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:07,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:07,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:07,943 INFO L129 PetriNetUnfolder]: 314/867 cut-off events. [2022-07-22 21:58:07,944 INFO L130 PetriNetUnfolder]: For 7979/7979 co-relation queries the response was YES. [2022-07-22 21:58:07,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4847 conditions, 867 events. 314/867 cut-off events. For 7979/7979 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4955 event pairs, 15 based on Foata normal form. 1/864 useless extension candidates. Maximal degree in co-relation 4784. Up to 279 conditions per place. [2022-07-22 21:58:07,956 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 175 selfloop transitions, 295 changer transitions 6/517 dead transitions. [2022-07-22 21:58:07,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 517 transitions, 6195 flow [2022-07-22 21:58:07,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 21:58:07,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-22 21:58:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1197 transitions. [2022-07-22 21:58:07,958 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2022-07-22 21:58:07,958 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1197 transitions. [2022-07-22 21:58:07,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1197 transitions. [2022-07-22 21:58:07,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:07,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1197 transitions. [2022-07-22 21:58:07,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 54.40909090909091) internal successors, (1197), 22 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:07,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:07,966 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:07,966 INFO L186 Difference]: Start difference. First operand has 243 places, 426 transitions, 4246 flow. Second operand 22 states and 1197 transitions. [2022-07-22 21:58:07,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 517 transitions, 6195 flow [2022-07-22 21:58:08,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 517 transitions, 5917 flow, removed 63 selfloop flow, removed 19 redundant places. [2022-07-22 21:58:08,031 INFO L242 Difference]: Finished difference. Result has 246 places, 500 transitions, 5637 flow [2022-07-22 21:58:08,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5637, PETRI_PLACES=246, PETRI_TRANSITIONS=500} [2022-07-22 21:58:08,033 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 172 predicate places. [2022-07-22 21:58:08,033 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 500 transitions, 5637 flow [2022-07-22 21:58:08,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:08,034 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:08,034 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:58:08,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:58:08,034 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:08,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:08,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1989198950, now seen corresponding path program 5 times [2022-07-22 21:58:08,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:08,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346148171] [2022-07-22 21:58:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:08,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:08,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:08,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346148171] [2022-07-22 21:58:08,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346148171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:08,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191921528] [2022-07-22 21:58:08,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:58:08,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:08,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:08,176 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) [2022-07-22 21:58:08,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:58:08,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:58:08,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 21:58:08,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:08,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:08,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191921528] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:08,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:08,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-07-22 21:58:08,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326551348] [2022-07-22 21:58:08,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:08,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:58:08,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:08,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:58:08,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:58:08,643 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:08,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 500 transitions, 5637 flow. Second operand has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:08,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:08,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:08,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:09,519 INFO L129 PetriNetUnfolder]: 567/1570 cut-off events. [2022-07-22 21:58:09,519 INFO L130 PetriNetUnfolder]: For 13395/13395 co-relation queries the response was YES. [2022-07-22 21:58:09,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9277 conditions, 1570 events. 567/1570 cut-off events. For 13395/13395 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11033 event pairs, 20 based on Foata normal form. 2/1566 useless extension candidates. Maximal degree in co-relation 9214. Up to 256 conditions per place. [2022-07-22 21:58:09,544 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 239 selfloop transitions, 614 changer transitions 38/932 dead transitions. [2022-07-22 21:58:09,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 932 transitions, 12681 flow [2022-07-22 21:58:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 21:58:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-22 21:58:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1756 transitions. [2022-07-22 21:58:09,548 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6532738095238095 [2022-07-22 21:58:09,548 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1756 transitions. [2022-07-22 21:58:09,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1756 transitions. [2022-07-22 21:58:09,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:09,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1756 transitions. [2022-07-22 21:58:09,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 54.875) internal successors, (1756), 32 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:09,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:09,555 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:09,556 INFO L186 Difference]: Start difference. First operand has 246 places, 500 transitions, 5637 flow. Second operand 32 states and 1756 transitions. [2022-07-22 21:58:09,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 932 transitions, 12681 flow [2022-07-22 21:58:09,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 932 transitions, 12327 flow, removed 76 selfloop flow, removed 4 redundant places. [2022-07-22 21:58:09,693 INFO L242 Difference]: Finished difference. Result has 278 places, 794 transitions, 10901 flow [2022-07-22 21:58:09,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5435, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10901, PETRI_PLACES=278, PETRI_TRANSITIONS=794} [2022-07-22 21:58:09,694 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 204 predicate places. [2022-07-22 21:58:09,695 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 794 transitions, 10901 flow [2022-07-22 21:58:09,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:09,695 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:09,696 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] [2022-07-22 21:58:09,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:09,907 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,SelfDestructingSolverStorable9 [2022-07-22 21:58:09,908 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1446076332, now seen corresponding path program 6 times [2022-07-22 21:58:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:09,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989554761] [2022-07-22 21:58:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:09,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:10,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:10,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989554761] [2022-07-22 21:58:10,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989554761] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:10,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934356509] [2022-07-22 21:58:10,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:58:10,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:10,048 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) [2022-07-22 21:58:10,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:58:10,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-22 21:58:10,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:10,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:58:10,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:10,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:58:10,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934356509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:10,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:10,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-07-22 21:58:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276190322] [2022-07-22 21:58:10,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:10,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:58:10,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:58:10,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:58:10,528 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:10,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 794 transitions, 10901 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:10,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:10,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:10,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:12,339 INFO L129 PetriNetUnfolder]: 982/2553 cut-off events. [2022-07-22 21:58:12,340 INFO L130 PetriNetUnfolder]: For 29039/29039 co-relation queries the response was YES. [2022-07-22 21:58:12,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17090 conditions, 2553 events. 982/2553 cut-off events. For 29039/29039 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19674 event pairs, 12 based on Foata normal form. 28/2578 useless extension candidates. Maximal degree in co-relation 17022. Up to 408 conditions per place. [2022-07-22 21:58:12,384 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 300 selfloop transitions, 1101 changer transitions 20/1462 dead transitions. [2022-07-22 21:58:12,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1462 transitions, 22972 flow [2022-07-22 21:58:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 21:58:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-22 21:58:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2711 transitions. [2022-07-22 21:58:12,388 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6586491739552964 [2022-07-22 21:58:12,388 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2711 transitions. [2022-07-22 21:58:12,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2711 transitions. [2022-07-22 21:58:12,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:12,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2711 transitions. [2022-07-22 21:58:12,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.326530612244895) internal successors, (2711), 49 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:12,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:12,399 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:12,399 INFO L186 Difference]: Start difference. First operand has 278 places, 794 transitions, 10901 flow. Second operand 49 states and 2711 transitions. [2022-07-22 21:58:12,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1462 transitions, 22972 flow [2022-07-22 21:58:12,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1462 transitions, 21639 flow, removed 94 selfloop flow, removed 14 redundant places. [2022-07-22 21:58:12,654 INFO L242 Difference]: Finished difference. Result has 321 places, 1303 transitions, 20930 flow [2022-07-22 21:58:12,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10193, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=20930, PETRI_PLACES=321, PETRI_TRANSITIONS=1303} [2022-07-22 21:58:12,655 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2022-07-22 21:58:12,655 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 1303 transitions, 20930 flow [2022-07-22 21:58:12,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:12,656 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:12,657 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] [2022-07-22 21:58:12,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:12,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:12,862 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:12,862 INFO L85 PathProgramCache]: Analyzing trace with hash -481463372, now seen corresponding path program 7 times [2022-07-22 21:58:12,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:12,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628602903] [2022-07-22 21:58:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:12,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:12,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:12,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628602903] [2022-07-22 21:58:12,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628602903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:12,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:12,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-22 21:58:12,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598209851] [2022-07-22 21:58:12,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:12,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:58:12,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:12,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:58:12,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:58:12,966 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:12,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1303 transitions, 20930 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:12,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:12,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:12,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:14,171 INFO L129 PetriNetUnfolder]: 1036/2636 cut-off events. [2022-07-22 21:58:14,172 INFO L130 PetriNetUnfolder]: For 38102/38102 co-relation queries the response was YES. [2022-07-22 21:58:14,192 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20033 conditions, 2636 events. 1036/2636 cut-off events. For 38102/38102 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20206 event pairs, 35 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 19949. Up to 1358 conditions per place. [2022-07-22 21:58:14,210 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 930 selfloop transitions, 461 changer transitions 6/1438 dead transitions. [2022-07-22 21:58:14,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1438 transitions, 25804 flow [2022-07-22 21:58:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:58:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:58:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2022-07-22 21:58:14,212 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2022-07-22 21:58:14,213 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2022-07-22 21:58:14,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2022-07-22 21:58:14,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:14,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2022-07-22 21:58:14,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:14,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:14,216 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:14,216 INFO L186 Difference]: Start difference. First operand has 321 places, 1303 transitions, 20930 flow. Second operand 15 states and 824 transitions. [2022-07-22 21:58:14,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1438 transitions, 25804 flow [2022-07-22 21:58:14,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1438 transitions, 25588 flow, removed 82 selfloop flow, removed 10 redundant places. [2022-07-22 21:58:14,589 INFO L242 Difference]: Finished difference. Result has 332 places, 1402 transitions, 23575 flow [2022-07-22 21:58:14,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20730, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23575, PETRI_PLACES=332, PETRI_TRANSITIONS=1402} [2022-07-22 21:58:14,590 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 258 predicate places. [2022-07-22 21:58:14,591 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1402 transitions, 23575 flow [2022-07-22 21:58:14,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:14,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:14,591 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] [2022-07-22 21:58:14,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:58:14,591 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:14,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1161289794, now seen corresponding path program 8 times [2022-07-22 21:58:14,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:14,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173027531] [2022-07-22 21:58:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:14,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:14,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:14,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173027531] [2022-07-22 21:58:14,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173027531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:14,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039988152] [2022-07-22 21:58:14,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:58:14,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:14,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:14,700 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) [2022-07-22 21:58:14,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:58:14,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:58:14,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:14,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:58:14,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:14,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:58:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039988152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:14,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:58:14,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-07-22 21:58:14,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624061288] [2022-07-22 21:58:14,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:14,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:58:14,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:58:14,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:58:15,000 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:15,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1402 transitions, 23575 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:15,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:15,001 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:15,001 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:16,491 INFO L129 PetriNetUnfolder]: 1249/3243 cut-off events. [2022-07-22 21:58:16,491 INFO L130 PetriNetUnfolder]: For 54227/54227 co-relation queries the response was YES. [2022-07-22 21:58:16,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25398 conditions, 3243 events. 1249/3243 cut-off events. For 54227/54227 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 26392 event pairs, 45 based on Foata normal form. 1/3232 useless extension candidates. Maximal degree in co-relation 25307. Up to 2238 conditions per place. [2022-07-22 21:58:16,548 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1458 selfloop transitions, 196 changer transitions 10/1705 dead transitions. [2022-07-22 21:58:16,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1705 transitions, 32235 flow [2022-07-22 21:58:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:58:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:58:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-07-22 21:58:16,550 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2022-07-22 21:58:16,550 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-07-22 21:58:16,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-07-22 21:58:16,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:16,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-07-22 21:58:16,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:16,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:16,554 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:16,554 INFO L186 Difference]: Start difference. First operand has 332 places, 1402 transitions, 23575 flow. Second operand 16 states and 910 transitions. [2022-07-22 21:58:16,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1705 transitions, 32235 flow [2022-07-22 21:58:17,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1705 transitions, 32025 flow, removed 105 selfloop flow, removed 3 redundant places. [2022-07-22 21:58:17,144 INFO L242 Difference]: Finished difference. Result has 351 places, 1567 transitions, 27236 flow [2022-07-22 21:58:17,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23493, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=27236, PETRI_PLACES=351, PETRI_TRANSITIONS=1567} [2022-07-22 21:58:17,146 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 277 predicate places. [2022-07-22 21:58:17,147 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1567 transitions, 27236 flow [2022-07-22 21:58:17,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:17,147 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:17,147 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] [2022-07-22 21:58:17,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:17,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:17,350 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:17,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:17,350 INFO L85 PathProgramCache]: Analyzing trace with hash -623374472, now seen corresponding path program 9 times [2022-07-22 21:58:17,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:17,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250810388] [2022-07-22 21:58:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:17,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:17,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:17,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250810388] [2022-07-22 21:58:17,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250810388] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:17,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206032777] [2022-07-22 21:58:17,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:58:17,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:17,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:17,452 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) [2022-07-22 21:58:17,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:58:17,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:58:17,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:17,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:58:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:17,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:58:17,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206032777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:17,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:58:17,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-07-22 21:58:17,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655479533] [2022-07-22 21:58:17,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:17,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:58:17,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:17,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:58:17,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:58:17,733 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:17,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1567 transitions, 27236 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:17,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:17,734 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:17,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:19,398 INFO L129 PetriNetUnfolder]: 1328/3463 cut-off events. [2022-07-22 21:58:19,398 INFO L130 PetriNetUnfolder]: For 59706/59706 co-relation queries the response was YES. [2022-07-22 21:58:19,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27717 conditions, 3463 events. 1328/3463 cut-off events. For 59706/59706 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28760 event pairs, 57 based on Foata normal form. 2/3450 useless extension candidates. Maximal degree in co-relation 27618. Up to 2638 conditions per place. [2022-07-22 21:58:19,456 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1511 selfloop transitions, 137 changer transitions 13/1702 dead transitions. [2022-07-22 21:58:19,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1702 transitions, 32815 flow [2022-07-22 21:58:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:58:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:58:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1006 transitions. [2022-07-22 21:58:19,458 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6653439153439153 [2022-07-22 21:58:19,458 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1006 transitions. [2022-07-22 21:58:19,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1006 transitions. [2022-07-22 21:58:19,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:19,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1006 transitions. [2022-07-22 21:58:19,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:19,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:19,462 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:19,463 INFO L186 Difference]: Start difference. First operand has 351 places, 1567 transitions, 27236 flow. Second operand 18 states and 1006 transitions. [2022-07-22 21:58:19,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1702 transitions, 32815 flow [2022-07-22 21:58:20,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1702 transitions, 32671 flow, removed 56 selfloop flow, removed 6 redundant places. [2022-07-22 21:58:20,192 INFO L242 Difference]: Finished difference. Result has 369 places, 1646 transitions, 28995 flow [2022-07-22 21:58:20,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=27094, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=28995, PETRI_PLACES=369, PETRI_TRANSITIONS=1646} [2022-07-22 21:58:20,194 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 295 predicate places. [2022-07-22 21:58:20,194 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1646 transitions, 28995 flow [2022-07-22 21:58:20,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:20,195 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:20,195 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] [2022-07-22 21:58:20,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:20,409 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,SelfDestructingSolverStorable13 [2022-07-22 21:58:20,409 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:20,410 INFO L85 PathProgramCache]: Analyzing trace with hash 474873992, now seen corresponding path program 10 times [2022-07-22 21:58:20,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:20,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678721259] [2022-07-22 21:58:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:20,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:20,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:20,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678721259] [2022-07-22 21:58:20,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678721259] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:20,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282349816] [2022-07-22 21:58:20,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:58:20,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:20,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:20,524 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) [2022-07-22 21:58:20,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:58:20,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:58:20,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:58:20,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:20,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:58:20,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282349816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:20,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:58:20,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-07-22 21:58:20,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214995337] [2022-07-22 21:58:20,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:20,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:58:20,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:20,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:58:20,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:58:20,804 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:20,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1646 transitions, 28995 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:20,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:20,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:20,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:22,660 INFO L129 PetriNetUnfolder]: 1417/3695 cut-off events. [2022-07-22 21:58:22,660 INFO L130 PetriNetUnfolder]: For 68812/68812 co-relation queries the response was YES. [2022-07-22 21:58:22,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30337 conditions, 3695 events. 1417/3695 cut-off events. For 68812/68812 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 31284 event pairs, 74 based on Foata normal form. 1/3680 useless extension candidates. Maximal degree in co-relation 30230. Up to 2810 conditions per place. [2022-07-22 21:58:22,716 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1599 selfloop transitions, 153 changer transitions 10/1803 dead transitions. [2022-07-22 21:58:22,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1803 transitions, 35606 flow [2022-07-22 21:58:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:58:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:58:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1163 transitions. [2022-07-22 21:58:22,718 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.659297052154195 [2022-07-22 21:58:22,718 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1163 transitions. [2022-07-22 21:58:22,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1163 transitions. [2022-07-22 21:58:22,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:22,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1163 transitions. [2022-07-22 21:58:22,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:22,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:22,723 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:22,723 INFO L186 Difference]: Start difference. First operand has 369 places, 1646 transitions, 28995 flow. Second operand 21 states and 1163 transitions. [2022-07-22 21:58:22,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1803 transitions, 35606 flow [2022-07-22 21:58:23,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1803 transitions, 35336 flow, removed 117 selfloop flow, removed 7 redundant places. [2022-07-22 21:58:23,371 INFO L242 Difference]: Finished difference. Result has 390 places, 1745 transitions, 31399 flow [2022-07-22 21:58:23,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=28749, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=31399, PETRI_PLACES=390, PETRI_TRANSITIONS=1745} [2022-07-22 21:58:23,373 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 316 predicate places. [2022-07-22 21:58:23,373 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 1745 transitions, 31399 flow [2022-07-22 21:58:23,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:23,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:23,374 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:58:23,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-22 21:58:23,587 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,SelfDestructingSolverStorable14 [2022-07-22 21:58:23,587 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:23,588 INFO L85 PathProgramCache]: Analyzing trace with hash -240400877, now seen corresponding path program 11 times [2022-07-22 21:58:23,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:23,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249866974] [2022-07-22 21:58:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:23,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:23,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:23,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249866974] [2022-07-22 21:58:23,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249866974] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:23,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005005414] [2022-07-22 21:58:23,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:58:23,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:23,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:23,674 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) [2022-07-22 21:58:23,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:58:23,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:58:23,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:23,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:58:23,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:23,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:24,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005005414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:24,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:24,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-22 21:58:24,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649703157] [2022-07-22 21:58:24,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:24,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:58:24,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:24,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:58:24,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:58:24,102 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:24,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 1745 transitions, 31399 flow. Second operand has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:24,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:24,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:24,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:26,434 INFO L129 PetriNetUnfolder]: 1570/4126 cut-off events. [2022-07-22 21:58:26,434 INFO L130 PetriNetUnfolder]: For 82120/82120 co-relation queries the response was YES. [2022-07-22 21:58:26,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34161 conditions, 4126 events. 1570/4126 cut-off events. For 82120/82120 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 36010 event pairs, 20 based on Foata normal form. 17/4142 useless extension candidates. Maximal degree in co-relation 34045. Up to 1423 conditions per place. [2022-07-22 21:58:26,492 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 1232 selfloop transitions, 740 changer transitions 25/2038 dead transitions. [2022-07-22 21:58:26,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 2038 transitions, 40623 flow [2022-07-22 21:58:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 21:58:26,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-22 21:58:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1071 transitions. [2022-07-22 21:58:26,493 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2022-07-22 21:58:26,493 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1071 transitions. [2022-07-22 21:58:26,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1071 transitions. [2022-07-22 21:58:26,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:26,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1071 transitions. [2022-07-22 21:58:26,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.36842105263158) internal successors, (1071), 19 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:26,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:26,497 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:26,497 INFO L186 Difference]: Start difference. First operand has 390 places, 1745 transitions, 31399 flow. Second operand 19 states and 1071 transitions. [2022-07-22 21:58:26,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 2038 transitions, 40623 flow [2022-07-22 21:58:27,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 2038 transitions, 40265 flow, removed 161 selfloop flow, removed 7 redundant places. [2022-07-22 21:58:27,580 INFO L242 Difference]: Finished difference. Result has 408 places, 1890 transitions, 36756 flow [2022-07-22 21:58:27,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=31061, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1083, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=36756, PETRI_PLACES=408, PETRI_TRANSITIONS=1890} [2022-07-22 21:58:27,582 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 334 predicate places. [2022-07-22 21:58:27,582 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1890 transitions, 36756 flow [2022-07-22 21:58:27,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:27,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:27,583 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:58:27,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-22 21:58:27,793 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,SelfDestructingSolverStorable15 [2022-07-22 21:58:27,793 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:27,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1349597943, now seen corresponding path program 12 times [2022-07-22 21:58:27,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:27,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74888263] [2022-07-22 21:58:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:27,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:27,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:27,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74888263] [2022-07-22 21:58:27,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74888263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:27,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734486723] [2022-07-22 21:58:27,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:58:27,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:27,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:27,881 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) [2022-07-22 21:58:27,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:58:27,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 21:58:27,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:27,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:58:27,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:28,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:28,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734486723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:28,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:28,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-22 21:58:28,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56939857] [2022-07-22 21:58:28,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:28,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 21:58:28,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 21:58:28,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-07-22 21:58:28,449 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:28,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1890 transitions, 36756 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:28,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:28,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:28,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:32,464 INFO L129 PetriNetUnfolder]: 1993/5336 cut-off events. [2022-07-22 21:58:32,464 INFO L130 PetriNetUnfolder]: For 146667/146667 co-relation queries the response was YES. [2022-07-22 21:58:32,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48269 conditions, 5336 events. 1993/5336 cut-off events. For 146667/146667 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 47758 event pairs, 22 based on Foata normal form. 27/5361 useless extension candidates. Maximal degree in co-relation 48146. Up to 1287 conditions per place. [2022-07-22 21:58:32,589 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1142 selfloop transitions, 1472 changer transitions 34/2689 dead transitions. [2022-07-22 21:58:32,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 2689 transitions, 58358 flow [2022-07-22 21:58:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-22 21:58:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-07-22 21:58:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3701 transitions. [2022-07-22 21:58:32,594 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6576048329779673 [2022-07-22 21:58:32,594 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3701 transitions. [2022-07-22 21:58:32,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3701 transitions. [2022-07-22 21:58:32,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:32,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3701 transitions. [2022-07-22 21:58:32,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 55.23880597014925) internal successors, (3701), 67 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:32,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 84.0) internal successors, (5712), 68 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:32,613 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 84.0) internal successors, (5712), 68 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:32,613 INFO L186 Difference]: Start difference. First operand has 408 places, 1890 transitions, 36756 flow. Second operand 67 states and 3701 transitions. [2022-07-22 21:58:32,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 2689 transitions, 58358 flow [2022-07-22 21:58:33,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 2689 transitions, 57773 flow, removed 238 selfloop flow, removed 8 redundant places. [2022-07-22 21:58:33,971 INFO L242 Difference]: Finished difference. Result has 499 places, 2489 transitions, 55032 flow [2022-07-22 21:58:33,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=36429, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=949, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=55032, PETRI_PLACES=499, PETRI_TRANSITIONS=2489} [2022-07-22 21:58:33,973 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 425 predicate places. [2022-07-22 21:58:33,973 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 2489 transitions, 55032 flow [2022-07-22 21:58:33,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:33,974 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:33,974 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:58:33,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:34,174 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,SelfDestructingSolverStorable16 [2022-07-22 21:58:34,174 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1573275163, now seen corresponding path program 13 times [2022-07-22 21:58:34,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:34,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318465731] [2022-07-22 21:58:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:34,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:34,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318465731] [2022-07-22 21:58:34,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318465731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:34,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002423558] [2022-07-22 21:58:34,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:58:34,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:34,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:34,241 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) [2022-07-22 21:58:34,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:58:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:34,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 21:58:34,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:34,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:34,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002423558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:34,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:34,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-07-22 21:58:34,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570696368] [2022-07-22 21:58:34,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:34,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 21:58:34,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:34,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 21:58:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:58:34,734 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:34,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 2489 transitions, 55032 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:34,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:34,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:34,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:39,756 INFO L129 PetriNetUnfolder]: 2534/6394 cut-off events. [2022-07-22 21:58:39,756 INFO L130 PetriNetUnfolder]: For 194472/194472 co-relation queries the response was YES. [2022-07-22 21:58:39,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65950 conditions, 6394 events. 2534/6394 cut-off events. For 194472/194472 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 57228 event pairs, 65 based on Foata normal form. 4/6366 useless extension candidates. Maximal degree in co-relation 65795. Up to 2426 conditions per place. [2022-07-22 21:58:39,866 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1730 selfloop transitions, 1611 changer transitions 14/3396 dead transitions. [2022-07-22 21:58:39,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 3396 transitions, 82660 flow [2022-07-22 21:58:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 21:58:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-22 21:58:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2628 transitions. [2022-07-22 21:58:39,869 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6517857142857143 [2022-07-22 21:58:39,869 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2628 transitions. [2022-07-22 21:58:39,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2628 transitions. [2022-07-22 21:58:39,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:39,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2628 transitions. [2022-07-22 21:58:39,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 54.75) internal successors, (2628), 48 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:39,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:39,876 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:39,876 INFO L186 Difference]: Start difference. First operand has 499 places, 2489 transitions, 55032 flow. Second operand 48 states and 2628 transitions. [2022-07-22 21:58:39,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 3396 transitions, 82660 flow [2022-07-22 21:58:42,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 3396 transitions, 79239 flow, removed 1611 selfloop flow, removed 10 redundant places. [2022-07-22 21:58:42,622 INFO L242 Difference]: Finished difference. Result has 557 places, 3192 transitions, 75273 flow [2022-07-22 21:58:42,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=52267, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=75273, PETRI_PLACES=557, PETRI_TRANSITIONS=3192} [2022-07-22 21:58:42,625 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 483 predicate places. [2022-07-22 21:58:42,625 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 3192 transitions, 75273 flow [2022-07-22 21:58:42,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:42,625 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:42,625 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:58:42,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-22 21:58:42,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 21:58:42,826 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:42,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:42,826 INFO L85 PathProgramCache]: Analyzing trace with hash 242113833, now seen corresponding path program 14 times [2022-07-22 21:58:42,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:42,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130492481] [2022-07-22 21:58:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:42,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:42,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:42,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130492481] [2022-07-22 21:58:42,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130492481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:42,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074449106] [2022-07-22 21:58:42,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:58:42,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:42,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:42,904 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) [2022-07-22 21:58:42,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 21:58:42,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:58:42,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:42,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:58:42,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:43,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:43,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074449106] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:43,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:43,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-22 21:58:43,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625432902] [2022-07-22 21:58:43,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:43,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 21:58:43,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:43,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 21:58:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-07-22 21:58:43,296 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:43,297 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 3192 transitions, 75273 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:43,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:43,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:43,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:50,288 INFO L129 PetriNetUnfolder]: 2563/6504 cut-off events. [2022-07-22 21:58:50,288 INFO L130 PetriNetUnfolder]: For 178303/178303 co-relation queries the response was YES. [2022-07-22 21:58:50,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68067 conditions, 6504 events. 2563/6504 cut-off events. For 178303/178303 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 58137 event pairs, 22 based on Foata normal form. 34/6536 useless extension candidates. Maximal degree in co-relation 67894. Up to 2000 conditions per place. [2022-07-22 21:58:50,416 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1563 selfloop transitions, 1781 changer transitions 27/3412 dead transitions. [2022-07-22 21:58:50,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 3412 transitions, 86614 flow [2022-07-22 21:58:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 21:58:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-22 21:58:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2856 transitions. [2022-07-22 21:58:50,419 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2022-07-22 21:58:50,419 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2856 transitions. [2022-07-22 21:58:50,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2856 transitions. [2022-07-22 21:58:50,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:50,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2856 transitions. [2022-07-22 21:58:50,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.92307692307692) internal successors, (2856), 52 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:50,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:50,427 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:50,427 INFO L186 Difference]: Start difference. First operand has 557 places, 3192 transitions, 75273 flow. Second operand 52 states and 2856 transitions. [2022-07-22 21:58:50,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 3412 transitions, 86614 flow [2022-07-22 21:58:53,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 3412 transitions, 83438 flow, removed 1472 selfloop flow, removed 13 redundant places. [2022-07-22 21:58:53,527 INFO L242 Difference]: Finished difference. Result has 594 places, 3282 transitions, 80227 flow [2022-07-22 21:58:53,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=71764, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1661, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=80227, PETRI_PLACES=594, PETRI_TRANSITIONS=3282} [2022-07-22 21:58:53,531 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 520 predicate places. [2022-07-22 21:58:53,531 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 3282 transitions, 80227 flow [2022-07-22 21:58:53,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:53,532 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:53,532 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:58:53,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-22 21:58:53,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:53,737 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1203639799, now seen corresponding path program 15 times [2022-07-22 21:58:53,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:53,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330925611] [2022-07-22 21:58:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:53,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:58:53,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:53,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330925611] [2022-07-22 21:58:53,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330925611] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:53,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962438706] [2022-07-22 21:58:53,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:58:53,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:53,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:53,800 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) [2022-07-22 21:58:53,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 21:58:53,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:58:53,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:53,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:58:53,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:54,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:54,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962438706] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:54,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:54,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-07-22 21:58:54,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194071282] [2022-07-22 21:58:54,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:54,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 21:58:54,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 21:58:54,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:58:54,133 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:58:54,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 3282 transitions, 80227 flow. Second operand has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:54,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:54,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:58:54,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:02,374 INFO L129 PetriNetUnfolder]: 2977/7605 cut-off events. [2022-07-22 21:59:02,374 INFO L130 PetriNetUnfolder]: For 209622/209622 co-relation queries the response was YES. [2022-07-22 21:59:02,495 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81027 conditions, 7605 events. 2977/7605 cut-off events. For 209622/209622 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 70857 event pairs, 103 based on Foata normal form. 3/7546 useless extension candidates. Maximal degree in co-relation 80852. Up to 2393 conditions per place. [2022-07-22 21:59:02,559 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1696 selfloop transitions, 2062 changer transitions 6/3805 dead transitions. [2022-07-22 21:59:02,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 3805 transitions, 101709 flow [2022-07-22 21:59:02,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 21:59:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-22 21:59:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1920 transitions. [2022-07-22 21:59:02,562 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2022-07-22 21:59:02,562 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1920 transitions. [2022-07-22 21:59:02,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1920 transitions. [2022-07-22 21:59:02,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:02,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1920 transitions. [2022-07-22 21:59:02,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 54.857142857142854) internal successors, (1920), 35 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:02,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:02,568 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:02,568 INFO L186 Difference]: Start difference. First operand has 594 places, 3282 transitions, 80227 flow. Second operand 35 states and 1920 transitions. [2022-07-22 21:59:02,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 3805 transitions, 101709 flow [2022-07-22 21:59:06,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 3805 transitions, 98472 flow, removed 167 selfloop flow, removed 25 redundant places. [2022-07-22 21:59:06,208 INFO L242 Difference]: Finished difference. Result has 615 places, 3700 transitions, 96148 flow [2022-07-22 21:59:06,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=77318, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=96148, PETRI_PLACES=615, PETRI_TRANSITIONS=3700} [2022-07-22 21:59:06,212 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 541 predicate places. [2022-07-22 21:59:06,212 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 3700 transitions, 96148 flow [2022-07-22 21:59:06,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:06,213 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:06,213 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:59:06,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 21:59:06,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:06,439 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1905586027, now seen corresponding path program 16 times [2022-07-22 21:59:06,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:06,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77522243] [2022-07-22 21:59:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:06,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:06,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:06,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77522243] [2022-07-22 21:59:06,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77522243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:06,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408902509] [2022-07-22 21:59:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:59:06,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:06,549 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) [2022-07-22 21:59:06,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 21:59:06,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:59:06,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:06,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:59:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:06,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:06,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408902509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:06,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:06,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-22 21:59:06,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097664654] [2022-07-22 21:59:06,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:06,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:59:06,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:59:06,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:59:06,861 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:59:06,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 3700 transitions, 96148 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:06,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:06,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:59:06,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:17,392 INFO L129 PetriNetUnfolder]: 3382/8424 cut-off events. [2022-07-22 21:59:17,392 INFO L130 PetriNetUnfolder]: For 275824/275824 co-relation queries the response was YES. [2022-07-22 21:59:17,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95114 conditions, 8424 events. 3382/8424 cut-off events. For 275824/275824 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 78277 event pairs, 100 based on Foata normal form. 3/8367 useless extension candidates. Maximal degree in co-relation 94933. Up to 4271 conditions per place. [2022-07-22 21:59:17,583 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 2803 selfloop transitions, 1465 changer transitions 11/4320 dead transitions. [2022-07-22 21:59:17,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 4320 transitions, 121788 flow [2022-07-22 21:59:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 21:59:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-22 21:59:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1596 transitions. [2022-07-22 21:59:17,585 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6551724137931034 [2022-07-22 21:59:17,585 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1596 transitions. [2022-07-22 21:59:17,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1596 transitions. [2022-07-22 21:59:17,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:17,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1596 transitions. [2022-07-22 21:59:17,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.03448275862069) internal successors, (1596), 29 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:17,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:17,589 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:17,589 INFO L186 Difference]: Start difference. First operand has 615 places, 3700 transitions, 96148 flow. Second operand 29 states and 1596 transitions. [2022-07-22 21:59:17,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 4320 transitions, 121788 flow [2022-07-22 21:59:22,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 4320 transitions, 116605 flow, removed 1013 selfloop flow, removed 14 redundant places. [2022-07-22 21:59:22,339 INFO L242 Difference]: Finished difference. Result has 642 places, 4151 transitions, 110672 flow [2022-07-22 21:59:22,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=92197, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=110672, PETRI_PLACES=642, PETRI_TRANSITIONS=4151} [2022-07-22 21:59:22,342 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 568 predicate places. [2022-07-22 21:59:22,342 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 4151 transitions, 110672 flow [2022-07-22 21:59:22,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:22,342 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:22,342 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:59:22,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 21:59:22,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:22,543 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:22,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash -723433217, now seen corresponding path program 17 times [2022-07-22 21:59:22,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:22,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512144375] [2022-07-22 21:59:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:22,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:22,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:22,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512144375] [2022-07-22 21:59:22,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512144375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:22,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985619151] [2022-07-22 21:59:22,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:59:22,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:22,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:22,632 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) [2022-07-22 21:59:22,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 21:59:22,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 21:59:22,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:22,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 21:59:22,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:22,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:23,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985619151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:23,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:23,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 28 [2022-07-22 21:59:23,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69396627] [2022-07-22 21:59:23,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:23,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 21:59:23,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:23,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 21:59:23,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-07-22 21:59:23,092 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:59:23,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 4151 transitions, 110672 flow. Second operand has 28 states, 28 states have (on average 53.464285714285715) internal successors, (1497), 28 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:23,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:23,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:59:23,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:35,610 INFO L129 PetriNetUnfolder]: 3505/8631 cut-off events. [2022-07-22 21:59:35,611 INFO L130 PetriNetUnfolder]: For 285467/285467 co-relation queries the response was YES. [2022-07-22 21:59:35,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99687 conditions, 8631 events. 3505/8631 cut-off events. For 285467/285467 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 79835 event pairs, 2 based on Foata normal form. 92/8722 useless extension candidates. Maximal degree in co-relation 99496. Up to 1639 conditions per place. [2022-07-22 21:59:35,801 INFO L132 encePairwiseOnDemand]: 64/84 looper letters, 167 selfloop transitions, 4433 changer transitions 260/4901 dead transitions. [2022-07-22 21:59:35,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 4901 transitions, 140893 flow [2022-07-22 21:59:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-22 21:59:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-22 21:59:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3513 transitions. [2022-07-22 21:59:35,804 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6434065934065935 [2022-07-22 21:59:35,804 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3513 transitions. [2022-07-22 21:59:35,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3513 transitions. [2022-07-22 21:59:35,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:35,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3513 transitions. [2022-07-22 21:59:35,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 54.04615384615385) internal successors, (3513), 65 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:35,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 84.0) internal successors, (5544), 66 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:35,815 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 84.0) internal successors, (5544), 66 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:35,815 INFO L186 Difference]: Start difference. First operand has 642 places, 4151 transitions, 110672 flow. Second operand 65 states and 3513 transitions. [2022-07-22 21:59:35,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 4901 transitions, 140893 flow [2022-07-22 21:59:40,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 4901 transitions, 140341 flow, removed 133 selfloop flow, removed 15 redundant places. [2022-07-22 21:59:40,895 INFO L242 Difference]: Finished difference. Result has 710 places, 4566 transitions, 135855 flow [2022-07-22 21:59:40,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=109501, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3856, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=135855, PETRI_PLACES=710, PETRI_TRANSITIONS=4566} [2022-07-22 21:59:40,898 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 636 predicate places. [2022-07-22 21:59:40,898 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 4566 transitions, 135855 flow [2022-07-22 21:59:40,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 53.464285714285715) internal successors, (1497), 28 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:40,898 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:40,898 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:59:40,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 21:59:41,099 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,SelfDestructingSolverStorable21 [2022-07-22 21:59:41,099 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:41,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1126888515, now seen corresponding path program 18 times [2022-07-22 21:59:41,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:41,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662240784] [2022-07-22 21:59:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:41,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:41,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:41,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662240784] [2022-07-22 21:59:41,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662240784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:41,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600188752] [2022-07-22 21:59:41,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:59:41,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:41,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:41,181 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) [2022-07-22 21:59:41,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 21:59:41,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 21:59:41,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:41,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:59:41,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:41,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:41,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600188752] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:41,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:41,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-07-22 21:59:41,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047229454] [2022-07-22 21:59:41,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:41,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 21:59:41,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 21:59:41,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:59:41,541 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:59:41,542 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 4566 transitions, 135855 flow. Second operand has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:41,542 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:41,542 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:59:41,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:56,026 INFO L129 PetriNetUnfolder]: 3657/8295 cut-off events. [2022-07-22 21:59:56,026 INFO L130 PetriNetUnfolder]: For 334985/334985 co-relation queries the response was YES. [2022-07-22 21:59:56,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113541 conditions, 8295 events. 3657/8295 cut-off events. For 334985/334985 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72806 event pairs, 54 based on Foata normal form. 30/8281 useless extension candidates. Maximal degree in co-relation 113329. Up to 3768 conditions per place. [2022-07-22 21:59:56,269 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3522 selfloop transitions, 1563 changer transitions 4/5130 dead transitions. [2022-07-22 21:59:56,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 5130 transitions, 164211 flow [2022-07-22 21:59:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 21:59:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-22 21:59:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2679 transitions. [2022-07-22 21:59:56,277 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6508746355685131 [2022-07-22 21:59:56,277 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2679 transitions. [2022-07-22 21:59:56,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2679 transitions. [2022-07-22 21:59:56,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:56,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2679 transitions. [2022-07-22 21:59:56,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.673469387755105) internal successors, (2679), 49 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:56,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:56,283 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:56,284 INFO L186 Difference]: Start difference. First operand has 710 places, 4566 transitions, 135855 flow. Second operand 49 states and 2679 transitions. [2022-07-22 21:59:56,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 5130 transitions, 164211 flow [2022-07-22 22:00:03,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 5130 transitions, 153577 flow, removed 2314 selfloop flow, removed 37 redundant places. [2022-07-22 22:00:03,284 INFO L242 Difference]: Finished difference. Result has 705 places, 5008 transitions, 145047 flow [2022-07-22 22:00:03,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=127154, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=145047, PETRI_PLACES=705, PETRI_TRANSITIONS=5008} [2022-07-22 22:00:03,287 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 631 predicate places. [2022-07-22 22:00:03,287 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 5008 transitions, 145047 flow [2022-07-22 22:00:03,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:00:03,288 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:03,288 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:00:03,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 22:00:03,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:03,489 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash -66159831, now seen corresponding path program 19 times [2022-07-22 22:00:03,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:03,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436998778] [2022-07-22 22:00:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:03,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:03,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436998778] [2022-07-22 22:00:03,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436998778] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:00:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191497901] [2022-07-22 22:00:03,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 22:00:03,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:03,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:03,564 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) [2022-07-22 22:00:03,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 22:00:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:03,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 22:00:03,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:00:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:03,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:00:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:03,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191497901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:00:03,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:00:03,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 25 [2022-07-22 22:00:03,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658366178] [2022-07-22 22:00:03,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:00:03,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 22:00:03,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:03,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 22:00:03,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-07-22 22:00:03,931 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 22:00:03,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 5008 transitions, 145047 flow. Second operand has 25 states, 25 states have (on average 53.24) internal successors, (1331), 25 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:00:03,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:03,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 22:00:03,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:21,064 INFO L129 PetriNetUnfolder]: 3891/8904 cut-off events. [2022-07-22 22:00:21,064 INFO L130 PetriNetUnfolder]: For 324690/324690 co-relation queries the response was YES. [2022-07-22 22:00:21,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117008 conditions, 8904 events. 3891/8904 cut-off events. For 324690/324690 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 79576 event pairs, 22 based on Foata normal form. 4/8894 useless extension candidates. Maximal degree in co-relation 116803. Up to 3289 conditions per place. [2022-07-22 22:00:21,288 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3196 selfloop transitions, 2182 changer transitions 12/5431 dead transitions. [2022-07-22 22:00:21,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 5431 transitions, 168218 flow [2022-07-22 22:00:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 22:00:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-22 22:00:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2523 transitions. [2022-07-22 22:00:21,291 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6529503105590062 [2022-07-22 22:00:21,291 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2523 transitions. [2022-07-22 22:00:21,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2523 transitions. [2022-07-22 22:00:21,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:21,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2523 transitions. [2022-07-22 22:00:21,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.84782608695652) internal successors, (2523), 46 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:00:21,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:00:21,298 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:00:21,298 INFO L186 Difference]: Start difference. First operand has 705 places, 5008 transitions, 145047 flow. Second operand 46 states and 2523 transitions. [2022-07-22 22:00:21,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 5431 transitions, 168218 flow [2022-07-22 22:00:28,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 5431 transitions, 166364 flow, removed 908 selfloop flow, removed 7 redundant places. [2022-07-22 22:00:28,782 INFO L242 Difference]: Finished difference. Result has 768 places, 5360 transitions, 162919 flow [2022-07-22 22:00:28,785 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=143223, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1887, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3045, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=162919, PETRI_PLACES=768, PETRI_TRANSITIONS=5360} [2022-07-22 22:00:28,786 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 694 predicate places. [2022-07-22 22:00:28,786 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 5360 transitions, 162919 flow [2022-07-22 22:00:28,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.24) internal successors, (1331), 25 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:00:28,786 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:28,786 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:00:28,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 22:00:28,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:28,987 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:28,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1602266621, now seen corresponding path program 20 times [2022-07-22 22:00:28,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:28,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504278136] [2022-07-22 22:00:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:28,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:29,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:29,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504278136] [2022-07-22 22:00:29,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504278136] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:00:29,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293112531] [2022-07-22 22:00:29,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:00:29,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:29,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:29,073 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) [2022-07-22 22:00:29,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 22:00:29,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:00:29,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:00:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 22:00:29,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:00:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:29,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:00:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:29,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293112531] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:00:29,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:00:29,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-22 22:00:29,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434682086] [2022-07-22 22:00:29,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:00:29,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 22:00:29,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:29,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 22:00:29,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-07-22 22:00:29,422 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 22:00:29,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 5360 transitions, 162919 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:00:29,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:29,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 22:00:29,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:51,515 INFO L129 PetriNetUnfolder]: 4020/9124 cut-off events. [2022-07-22 22:00:51,515 INFO L130 PetriNetUnfolder]: For 393200/393200 co-relation queries the response was YES. [2022-07-22 22:00:51,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125989 conditions, 9124 events. 4020/9124 cut-off events. For 393200/393200 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 81078 event pairs, 56 based on Foata normal form. 19/9097 useless extension candidates. Maximal degree in co-relation 125759. Up to 4233 conditions per place. [2022-07-22 22:00:51,762 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4009 selfloop transitions, 1607 changer transitions 0/5657 dead transitions. [2022-07-22 22:00:51,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 5657 transitions, 182757 flow [2022-07-22 22:00:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 22:00:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-22 22:00:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2343 transitions. [2022-07-22 22:00:51,764 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486710963455149 [2022-07-22 22:00:51,764 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2343 transitions. [2022-07-22 22:00:51,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2343 transitions. [2022-07-22 22:00:51,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:51,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2343 transitions. [2022-07-22 22:00:51,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 54.48837209302326) internal successors, (2343), 43 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:00:51,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:00:51,769 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:00:51,770 INFO L186 Difference]: Start difference. First operand has 768 places, 5360 transitions, 162919 flow. Second operand 43 states and 2343 transitions. [2022-07-22 22:00:51,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 810 places, 5657 transitions, 182757 flow [2022-07-22 22:00:59,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 5657 transitions, 180544 flow, removed 1021 selfloop flow, removed 9 redundant places. [2022-07-22 22:01:00,060 INFO L242 Difference]: Finished difference. Result has 817 places, 5530 transitions, 171656 flow [2022-07-22 22:01:00,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160674, PETRI_DIFFERENCE_MINUEND_PLACES=759, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=171656, PETRI_PLACES=817, PETRI_TRANSITIONS=5530} [2022-07-22 22:01:00,066 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 743 predicate places. [2022-07-22 22:01:00,066 INFO L495 AbstractCegarLoop]: Abstraction has has 817 places, 5530 transitions, 171656 flow [2022-07-22 22:01:00,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:01:00,067 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:01:00,067 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:01:00,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 22:01:00,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:01:00,289 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:01:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:01:00,289 INFO L85 PathProgramCache]: Analyzing trace with hash 72955617, now seen corresponding path program 21 times [2022-07-22 22:01:00,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:01:00,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508346130] [2022-07-22 22:01:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:01:00,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:01:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:01:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:00,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:01:00,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508346130] [2022-07-22 22:01:00,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508346130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:01:00,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8647166] [2022-07-22 22:01:00,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 22:01:00,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:01:00,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:01:00,383 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) [2022-07-22 22:01:00,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 22:01:00,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 22:01:00,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:01:00,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 22:01:00,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:01:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:00,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:01:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:00,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8647166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:01:00,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:01:00,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-07-22 22:01:00,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206486476] [2022-07-22 22:01:00,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:01:00,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 22:01:00,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:01:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 22:01:00,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-07-22 22:01:00,738 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 22:01:00,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 5530 transitions, 171656 flow. Second operand has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:01:00,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:01:00,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 22:01:00,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:01:28,857 INFO L129 PetriNetUnfolder]: 4862/11036 cut-off events. [2022-07-22 22:01:28,858 INFO L130 PetriNetUnfolder]: For 498714/498714 co-relation queries the response was YES. [2022-07-22 22:01:29,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156070 conditions, 11036 events. 4862/11036 cut-off events. For 498714/498714 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 101076 event pairs, 22 based on Foata normal form. 4/11025 useless extension candidates. Maximal degree in co-relation 155826. Up to 2899 conditions per place. [2022-07-22 22:01:29,205 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3200 selfloop transitions, 3744 changer transitions 11/6996 dead transitions. [2022-07-22 22:01:29,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 6996 transitions, 231807 flow [2022-07-22 22:01:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 22:01:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-22 22:01:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1887 transitions. [2022-07-22 22:01:29,207 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2022-07-22 22:01:29,207 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1887 transitions. [2022-07-22 22:01:29,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1887 transitions. [2022-07-22 22:01:29,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:01:29,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1887 transitions. [2022-07-22 22:01:29,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.5) internal successors, (1887), 34 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:01:29,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:01:29,211 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:01:29,211 INFO L186 Difference]: Start difference. First operand has 817 places, 5530 transitions, 171656 flow. Second operand 34 states and 1887 transitions. [2022-07-22 22:01:29,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 6996 transitions, 231807 flow [2022-07-22 22:01:40,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 6996 transitions, 231565 flow, removed 71 selfloop flow, removed 12 redundant places. [2022-07-22 22:01:40,434 INFO L242 Difference]: Finished difference. Result has 853 places, 6586 transitions, 222391 flow [2022-07-22 22:01:40,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=171418, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2797, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=222391, PETRI_PLACES=853, PETRI_TRANSITIONS=6586} [2022-07-22 22:01:40,442 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 779 predicate places. [2022-07-22 22:01:40,442 INFO L495 AbstractCegarLoop]: Abstraction has has 853 places, 6586 transitions, 222391 flow [2022-07-22 22:01:40,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:01:40,443 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:01:40,443 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:01:40,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 22:01:40,659 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,SelfDestructingSolverStorable25 [2022-07-22 22:01:40,659 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:01:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:01:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash 816924545, now seen corresponding path program 22 times [2022-07-22 22:01:40,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:01:40,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129521117] [2022-07-22 22:01:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:01:40,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:01:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:01:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:40,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:01:40,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129521117] [2022-07-22 22:01:40,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129521117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:01:40,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270003889] [2022-07-22 22:01:40,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 22:01:40,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:01:40,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:01:40,756 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) [2022-07-22 22:01:40,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 22:01:40,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 22:01:40,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:01:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 22:01:40,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:01:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:41,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:01:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:41,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270003889] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:01:41,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:01:41,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-22 22:01:41,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114414684] [2022-07-22 22:01:41,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:01:41,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 22:01:41,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:01:41,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 22:01:41,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-07-22 22:01:41,149 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 22:01:41,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 6586 transitions, 222391 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 22:01:41,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:01:41,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 22:01:41,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand